APPENDICES
Reading edition
Tables Pages
A. I. Areas of the catchment basins of the Nile 119
B. II. Slopes of the Nile in its different reaches 120
C. III and IV. Velocities of the Nile in its different reaches 121
D. V to X. Distances of places on the Nile from each other 123
E. XI and XII. Details of observed discharges 129
F. XIII to XXIII. Observed discharges referred to gauges 131
G. XXIV. Mean discharges of the Nile tributaries in 1902, 1903 and 1904 139
H. XXV. Maximum and minimum discharges in 1902 and 1903 141
I. XXVI. Monthly discharges at Khartoum, Assuân and Cairo 142
J. XXVII to XL. Discharge tables for the different gauges on the Nile 143
K. XLI to LII. Detailed information about the Nile, Assuân to Cairo 153
L. LIII to LXIX. Gauges of the Nile and its tributaries 167
M. LXX and LXXI. Assuân and Cairo gauges, metres corresponding to pics 209
N. LXXII and LXXIII. Table converting cubic metres per day to cubic metres per second and vice versa 211
P. LXXIV. Bombay rainfall referred to the Assuân gauge 213
Q. LXXV to LXXXI. Meteorological data in the Nile Valley 214
N.B.—In Appendix L, the gauges are recorded in two different methods. If the fall or rise of water surface is gradual throughout the year, the gauges are recorded in five daily intervals. If, on the other hand, the rise and fall is gradual for the first four and last three months of the year, but the changes are abrupt in the remaining five months, the gauges are recorded in five daily intervals for seven months and daily for five months.
Appendix A.
Table I.—Areas of Catchment Basins of the Nile.
River. Area in square Kilometres
Area. Total. Grand Total.
Victoria Nile at Ripon Falls 244,000 244,000 ...
Additional area drained into Lake Albert 135,000 ... ...
Albert Nile at outlet of Lake Albert ... 379,000 ...
Albert Nile from Albert Lake to Gondokoro 94,000 ... ...
Albert Nile at Gondokoro ... 473,000 ...
Albert Nile, Gondokoro to above Sobat mouth 202,000 ... ...
Gazelle River 240,000 ... ...
Arab River 231,000 ... ...
673,000
Albert Nile above Sobat River mouth ... 1,136,000 ...
Saubat River 156,000 ... ...
White Nile below Sobat River mouth ... 1,292,000 ...
White Nile, Sobat River to Khartoum 393,000 ... ...
White Nile at Khartoum ... 1,685,000 1,685,000
Blue Nile in Abyssinian Hills and foot hills 247,000 ... ...
Blue Nile foot hills to Khartoum 53,000 ... ...
Total Blue Nile ... 300,000 ...
Nile at Khartoum ... ... 1,985,000
Nile between Khartoum and Atbara junction 54,000 ... ...
Nile above Atbara junction ... ... 2,049,000
Atbara River in Abyssinian hills and foot hills 131,000 ... ...
Atbara River foothills to mouth 106,000 ... ...
Total Atbara River ... 237,000 ...
Nile below Atbara junction ... ... 2,286,000
Lybian Desert from Atbara junction to Sea 335,000 ... ...
Arabian Desert from Atbara junction to Sea 386,000 ... ...
Total Desert Area ... 721,000 ...
Nile from its sources to its mouths ... ... 3,007,000
3,007,000
Appendix B.
Table II.—Slope of the Nile in flood from the Ripon Falls to the Sea.
River. From To Distance in kilomètres. Fall in metres. Slope.
Victoria Nile Ripon Falls Kakoji 64 57 1⁄1200
„ Kakoji Fowera 237 12 1⁄20000
„ Fowera Murchison Falls 68 377 1⁄180
„ Murchison Falls Lake Albert 30 3 1⁄10000
Albert Nile Lake Albert Dufile 218 8 1⁄25000
„ Dufile Fort Berkeley 155 223 1⁄700
„ Fort Berkeley Bôr 206 18 1⁄12000
„ Bôr Gaba Shamba 196 10 1⁄20000
„ Gaba Shamba Lake Nô 380 16 1⁄25000
„ Lake Nô Sobat 134 2 1⁄75000
White Nile Sobat 300 kilom. South of Khartum 538 11 1⁄50000
„ 300 kilom. South of Khartum Khartum 300 3 1⁄100000
The Nile. Khartum Shabluka 86 5 1⁄17000
6th Cataract 18 6 1⁄3000
„ 6th Cataract 5th Cataract 285 17 1⁄17000
„ 160 55 1⁄3000
„ 5th Cataract 4th Cataract 97 9 1⁄11000
„ 110 49 1⁄2250
„ 4th Cataract 3rd Cataract 313 26 1⁄12000
„ 80 11 1⁄7250
„ 3rd Cataract 2nd Cataract 110 17 1⁄6500
„ 200 66 1⁄3000
„ Wadi Haifa 1st Cataract 345 28 1⁄12500
„ 5 6 1⁄800
„ Assuân Barrage 964 75·4 1⁄13000
„ Barrage Mediterranean Sea 236 18·6 1⁄12500
5535 1129 1⁄5000
Appendix C.
Table III.—Velocity of the Nile in its different reaches.
Name of River. From To Dis- tance in kilo- metres. VELOCITY IN METRES PER SEC. VELOCITY IN KILO- METRES PER DAY. TIME IN WHICH THE WATER TRAVELS IN DAYS.
in flood. in low supply. in flood. in low supply. in flood. in low supply.
Victoria Nile. Ripon Falls Kakoji 64 1·2 1·2 100 100 ·7 ·7
„ Kakoji Lake Choga 47 ·7 ·6 60 50 ·8 ·9
Lake Choga 80 .. .. .. .. .. ..
„ Lake Choga Fowera 110 ·7 ·6 60 50 1·8 2·2
„ Fowera Murchison Falls 68 1·2 1·2 100 100 ·7 ·7
„ Murchison Falls Lake Albert 30 ·9 ·7 80 60 ·4 ·5
Lake Albert 10 .. .. .. .. .. ..
Albert Nile. Lake Albert Dufile 218 ·7 ·6 60 50 3·6 4·4
„ Dufile Fort Berkeley 155 ·9 ·7 80 60 1·9 2·6
„ Fort Berkeley Bôr 206 1·2 ·9 100 75 2·1 2·7
„ Bôr Gaba Shamba 196 ·9 ·7 80 60 2·4 3·2
„ Gaba Shamba Lake Nô 380 ·6 ·6 50 50 7·6 7·6
„ Lake Nô Sobat 134 ·35 ·35 30 30 4·5 4·5
White Nile. Sobat 300 kil. South of Khartum. 538 ·6 ·35 50 30 10·7 17·9
„ 300 kil. South of Khartum. Khartum 300 ·35 ·35 30 30 10·0 10·0
The Nile. Khartum Shabluka 86 1·6 ·8 140 70 ·6 1·2
„ 6th Cataract 18 2·3 ·8 200 100 ·1 ·2
„ 6th Cataract—5th Cataract 285 1·6 ·8 140 70 2·0 4·1
„ 5th Cataract 160 2·3 1·2 200 100 ·8 1·6
„ 5th Cataract—4th Cataract 97 1·75 ·85 150 75 ·6 1·3
„ 4th Cataract 110 2·3 1·2 200 100 ·6 1·1
„ 4th Cataract—3rd Cataract 313 1·75 ·85 150 75 2·1 4·2
„ 3rd Cataract 80 2·1 1·0 180 90 ·4 ·9
„ 3rd Cataract—2nd Cataract 110 2·1 1·0 180 90 ·6 1·2
„ 2nd Cataract 200 2·3 1·2 200 100 1·0 2·0
„ Wady Haifa—1st Cataract 345 1·75 ·85 150 75 2·3 4·6
„ 1st Cataract 5 2·3 1·2 200 100 0·02 0·05
„ Assuân—Barrage 964 1·75 ·85 150 75 6·4 13·0
Rosetta Branch. Barrage—Mediterranean Sea 236 1·75 ·85 150 75 1·6 2·2
Table IV.—Time water travels along the Nile.
From To Days Distance in kilo- metres.
in flood. in low supply.
Lake Victoria Lake Choga 2 2 111
Lake Choga .. .. 80
Lake Choga Lake Albert 3 3 209
Lake Albert .. .. 9
Lake Albert Gondokoro 6 7 403
Gondokoro Sobat 16 18 885
Sobat Khartum 21 28 838
Khartum Assuan 11 22 1,804
Assuan Cairo 6 12 945
Lake Albert Cairo 60 87 4,875
Appendix D. DISTANCE FROM THE SEA TO CAIRO, CAIRO TO ASSUAN, ASSUAN TO KHARTUM, KHARTUM TO GONDOKORO AND GONDOKORO TO THE RIPON FALLS, AND BACK.
Tables V and VI.—Distances in kilometres from the Barrage to the sea down the Damietta and Rosetta branches, and vice-versa, measured on the steamer track or Deep Channel in kilometres.
Name of Place. Distance from Barrage. Distance from Sea. Name of Place. Distance from Barrage. Distance from Sea.
Damietta Branch. Rosetta Branch.
Birshams 23 213 Ashmun 23 213
Benha 51 185 Geres 31 205
Mitbera 62 174 Khatatbeh 45 191
Zifta 88 148 Gizaï 63 173
Samanûd 124 112 Tenoub 95 141
Mansurah 142 94 Kafr Zayat 119 117
Sherbin 168 68 Kuddabah 140 96
Ras el Khalig (Station) 182 54 Shibrakhit 154 82
Mit Abu Ghaleb 194 42 Dessouk 168 68
Faraskur 203 33 Fuah 181 55
Damietta 221 15 Atfé 184 52
Sea 236 0 Rosetta 221 15
Sea 236 0
Table VII.—Distances in kilometres from Barrage to Assuan and back in kilometres measured on the steamer track or Deep Channel.—Upper-Egypt.
Name of Place. Distance from Barrage. Distance from Assuan.
Barrage 0 968
Kasr El Nil (Bridge)—Cairo 23 945
Rodah gauge 27 941
Badreshen 46 922
Aiyat 73 895
Wastah 108 860
Beni Suef 143 825
Maghagha 199 769
Minieh 268 700
Rodah 308 660
Derüt Escape 340 628
Manfalut 377 591
Asyut 420 548
Sohag 520 448
Girga 561 407
Baliyana 579 389
Dishna 665 303
Kena 685 283
Luxor 749 219
Armant 768 200
Esna 807 161
Edfou 859 109
Gebel Silsila 898 70
Kom Ombo 925 43
Assuan 968 0
Table VIII.—Distances in kilometres from Assuân to Khartoum and back.
Name of Place. Distance from Assuan. Distance from Khartoum.
Assuan (Shellal) 0 1804
Kalabsha 57 1747
Dekka 109 1695
Korosko 187 1617
Der 209 1595
Ibrim 229 1575
Toski 251 1553
Abu Simbel 283 1521
Wadi Haifa 345 1459
Kaibar 663 1141
Hannek 735 1069
Dongola 795 1009
Abu Hamed 1255 549
Berber 1460 344
Atbara 1484 320
Shendy 1621 183
Shabluka 1700 104
Khartoum 1804 0
Table IX.—Distances in kilometres from Khartoum to Gondokoro and back.
Name of Place. Distance from Khartoum. Distance from Gondokoro.
Khartoum 0 1723
Duem 201 1522
Abou Zeid 336 1387
Gebelain 384 1339
Kaka 639 1084
Kodok 747 976
Tewfikieh 830 893
Sobat 838 885
Mouth of Zeraf 886 837
Lake No 972 751
Hillet Nuer 1177 546
Sudd Block 15 1218 505
Gaba Shambe 1352 371
Bor 1548 175
Lado 1711 12
Gondokoro 1723 0
Table X.—Distances in kilometres from Gondokoro to Ripon Falls and back.
Name of Place. Distance from Gondokoro. Distance from Ripon Falls.
Gondokoro 0 803
Fort Berkeley 31 772
Dufile 186 617
Wadelai 331 472
Lake Albert 403 400
Murchison Falls 434 369
Fowera 501 302
Mruli 611 192
Lake Choga 691 112
Kakogi 739 64
Ripon Falls 803 0
Table XI.—Distances from Khartoum to Rosaires and back along the Blue Nile.
Name of Place. Distance from Khartoum. Distance from Rosaires.
Khartoum 0 615
Kamlin 98 517
Rufaa 151 464
Abu-Haraz 188 427
Rahad mouth 190 425
Wad-Medani 198 417
Dinder mouth 265 350
Sennaar 343 272
Karkoj 462 153
Rosaires 615 0
Appendix E
Table XII.—Details of observed discharges from Sir W. Garstin’s report on the Basin of the Upper Nile.
River. Locality. Gauge. Date. Area of Section. Velocity metres per second. Dis- charge m³ per second.
Victoria Nile Above Ripon Falls ·51 22·1·03 2312·0 0·237 548·0
Murchison Falls .. 20·3·03 894·4 0·65 577·0
Uganda Streams:
Ruizi .. .. 6·2·03 9·0 1·22 11·0
Nyam Gasha .. .. 16·2·03 8·9 0·55 4·9
Lukoku .. .. 24·2·03 5·4 0·53 2·8
Mbuku .. .. 25·2·03 6·1 1·16 7·1
Hima .. .. 25·2·03 1·1 0·70 0·7
Ruimi .. .. 26·2·03 5·8 0·74 4·3
Mpangu .. .. 26·2·03 3·0 0·88 2·6
Msisi .. .. 9·3·03 6·7 0·40 2·7
Ngusi .. .. 12·3·03 12·5 0·50 6·2
Kagera .. .. 26·2·03 412·0 0·35 143·0
Semliki Outlet of Lake Edward .. 18·2·03 130·0 0·70 90·0
„ Inlet of Lake Albert .. 4·3·03 121·0 0·96 116·0
Albert Nile tributaries:
Umi .. .. 22·3·03 15·1 1·20 12·3
Asua .. .. 28·3·03 18·7 0·58 10·8
Kit .. .. .. .. .. 0
Albert Nile Wadeiai ·52 22·3·03 770·9 0·84 646·0
„ Gondokoro ·18 28·3·01 779·0 0·73 566·0
„ „ ·84 9·9·02 1033·0 0·93 960·0
„ „ ·50 1·4·03 615·0 1·07 641·0
„ „ 2·33 9·9·03 1347·0 1·37 1847·0
„ „ ·84 14·5·04 .. .. 1138·0
„ Mongalla (north of Gondokoro) .. 14·9·03 1487·0 1·44 2046·0
„ Bôr .. 16·9·03 770·0 1·14 888·0
„ „ 2·03 12·5·04 .. .. 813·0
„ North of Gaba- .. 4·9·02 498·0 0·80 398·0
„ Shamba .. 18·9·03 669·0 0·80 532·0
Albert Nile Hillet Nûr .. 1·9·03 478·0 0·78 375·0
„ „ .. 13·4·03 392·0 0·88 346·0
„ North of Hillet-Nûr .. 1·4·01 485·0 0·54 262·0
„ „ .. 2·9·02 511·0 0·65 333·0
„ South of Lake Nô .. 14·4·00 262·0 0·84 219·0
„ „ .. 14·4·03 424·0 0·71 285·0
„ „ .. 31·8·03 441·0 0·72 318·0
„ „ .. 22·5·04 .. .. 302·0
Bahr El Gazal 28 kil. from mouth .. 30·8·03 52·0 0·23 12·0
„ 32„ .. 21·9·03 104·0 0·19 20·0
„ 33„ .. 2·4·01 149·0 0·18 27·0
„ 33„ .. 31·8·02 86·0 0·17 15·0
„ 50„ .. 15·4·03 200·0 0·20 23·0
„ 51„ .. 1·4·00 161·0 0·21 34·0
Bahr El Zeraf 8„ .. 22·9·02 240·0 0·40 97·0
„ 14„ .. 29·8·03 180·0 0·61 110·0
„ 19„ .. 3·4·01 138·0 0·24 33·0
„ 20„ .. 16·4·03 179·0 0·30 50·0
„ 20„ .. 22·9·03 232·0 0·66 158·0
„ 96„ .. 25·3·00 91·0 0·35 32·0
Albert Nile Above Sobat junction .. 30·8·02 813·0 0·41 336·0
„ „ .. 22·9·02 1054·0 0·40 419·0
„ „ .. 22·9·03 1034·0 0·44 450·0
„ „ .. 16·4·03 710·0 0·49 349·0
Sobat River 25 kil. from mouth 3·16 26·9·03 1030·0 0·87 895·0
„ 25„ 2·70 26·8·03 .. .. 769·0
„ 40„ ·10 17·4·03 414·0 0·12 45·0
„ 45„ .. 6·4·01 401·0 0·22 87·0
White Nile Tewfikia .. 6·4·01 1081·0 0·28 381·0
„ „ ·24 17·4·03 1068·0 0·35 368·0
„ „ 2·65 26·8·03 2174·0 0·54 1046·0
„ „ 3·38 26·9·03 2332·0 0·56 1304·0
„ „ .. 25·9·02 1983·0 0·66 1272·0
Blue Nile Outlet of Lake Tsana .. 31·1·03 65·0 0·64 41·8
Appendix F.
Table XIII.—Observed discharges of the Victoria Nile referred to the Jinja gauge on Lake Victoria.
1903
Date of Discharge. Locality where taken. Gauge at Jinja Discharge in metres³ per second.
Day of discharge. 10 days before discharge. 15 days before discharge.
22 January Ripon Falls ·51 .. .. 548
20 March Below the Murchison Falls .. ·66 ·70 577
Table XIV.—Observed discharges of the Albert Nile at Wadelai referred to the Wadelai gauge.
1903
Date of Discharge. Gauge. Discharge in metres³ per second. Remarks.
22 March ·52 646
Table XV.—Observed discharges of the Albert Nile referred to the Mongalla gauge.
1903
Locality. Kilo- metres from Gondo- koro. Date. Mongalla gauge (32 kilom. north of Gondokoro) Discharge m³ per second.
5 days before. 4 days before. 3 days before. 2 days before. 1 day before. day of dis- charge. 1 day after.
Gondokoro 0 1 April .. .. .. .. .. 0·83 0·83 [9]693
.. 9 September 2·73 2·85 2·90 3·02 3·16 3·14 3·08 [10]1985
Mongalla 32 14 September 3·14 3·08 2·90 2·84 2·82 2·82 2·82 2046
Derwish Dem 156 16 September 2·90 2·84 2·82 2·82 2·82 2·84 2·92 888
North of Gaba-Shamba 415 18 September 2·82 2·82 2·82 2·84 2·92 3·06 3·12 532
Hillet Nur 538 1 September 2·52 2·52 ? ? ? 2·52 2·45 375
Hillet Nur 542 13 April 0·87 0·89 0·90 0·90 0·87 0·88 0·88 331
South of Lake No 741 14 April 0·89 0·90 0·90 0·87 0·88 0·88 0·89 285
South of Lake No 742 31 August 2·49 2·52 2·52 ? ? ? 2·52 318
1904
Gondokoro .. 14 May 1·89 1·89 1·96 2·03 2·10 2·03 2·07 1138
Bôr 165 12 May 1·89 1·89 1·89 1·89 1·96 2·03 2·10 813
South of Lake No 742 22 May 2·03 2·03 2·03 2·07 2·07 2·17 2·17 302
Table XVI.—Observed discharges of the Bahr El Gazelle referred to the Tewfikia gauge on the White Nile.
Date of discharge. Gauge Discharges m³ per second. Remarks.
Day. 1 day after. 2 days after. 3 days after.
21 September 3·31 3·33 3·35 3·36 20
30 August 2·74 2·75 2·76 2·77 12
Table XVII.—Observed discharges of the Bahr El Zeraf referred to the Tewfikia gauge on the White Nile.
1903
Date of discharge. Gauge Discharge m³ per second. Remarks.
1 day before. Day. 1 day after.
16 April 0·24 0·24 0·24 50
22 September 3·31 3·33 3·35 158
8 May 0·25 0·26 0·26 61
29 August 2·68 2·70 2·72 110 App. gauge
1904
23 May 1·35 1·38 1·40 124
Table XVIII.—Observed discharges of the Albert Nile above the Sobat junction referred to the Tewfikia gauge.
1903
Date of discharge. Gauge Discharge m³ per second.
1 day before. day. 1 day after.
16 April ·24 ·24 ·24 349
22 September 3·31 3·33 3·35 450
Table XIX.—Observed discharges of the Sobat River referred to the Dulaib Hilla gauge.
1903
17 April .. ·10 .. 45
26 August 2·70 2·71 2·74 769
26 September 3·16 3·17 3·19 895
Table XX.—Observed discharges of the White Nile just below the Sobat junction referred to the Tewfikia gauge.
1903
17 April ·24 ·24 ·24 381
26 August 2·64 2·65 2·66 1046
26 September 3·37 3·38 3·40 1304
Table XXI.—Observed discharges of the White Nile at Duem referred to the Duem and Khartoum gauges.
Date. Duem Gauge - Gauge. Khartoum Gauges Dis- charge cubic metres per second.
3 days before. 2 days before. day before. day of dis- charge.
1902
May 13 ·51 -·06 -·07 -·04 -·04 347
June 11 ·95 ·76 ·75 ·77 ·84 650
July 8 1·42 1·70 1·70 1·85 2·03 788
August 5 2·20 3·52 3·62 3·71 3·79 867
September 2 3·48 5·30 5·30 5·20 5·20 330
October 1 3·50 5·03 5·06 5·16 5·14 870
October 28 2·50 3·35 3·30 3·23 3·16 802
December 1 2·00 2·11 2·10 2·08 2·06 930
December 29 2·04 1·54 1·50 1·48 1·45 1518
1903
January 27 1·12 0·90 0·87 0·84 0·83 663
February 24 0·86 0·36 0·32 0·29 0·28 462
March 24 0·46 0·02 0·01 0·01 0·02 559
April 21 0·38 -0·14 -0·12 -0·12 -0·16 415
May 19 0·38 -0·26 -0·23 -0·21 -0·19 447
June 16 1·09 1·41 1·56 1·65 1·75 658
July 1 1·31 1·61 1·54 1·54 1·54 884
„14 1·71 2·55 2·58 2·75 2·80 835
August 4 2·46 3·50 3·80 4·05 4·40 768
„ 11 3·28 4·95 5·06 5·06 5·10 579
„ 18 3·70 5·55 5·70 5·80 5·70 534
„ 23 4·08 5·80 5·90 5·95 6·00 654
„ 28 4·18 6·03 6·08 6·00 6·05 710
September 2 4·33 6·15 6·28 6·24 6·30 571
„ 7 4·43 6·20 6·20 6·15 6·12 737
„12 4·46 6·24 6·14 6·15 6·05 653
„18 4·40 5·86 5·95 5·88 5·88 840
„24 4·28 5·95 6·00 6·10 6·10 763
October 7 3·93 5·57 5·40 5·32 5·10 1588
November 3 3·11 3·90 3·85 3·75 3·65 1563
„ 24 2·44 2·65 2·63 2·63 2·60 1665
December 8 2·06 2·30 2·28 2·20 2·15 1462
„ 22 1·80 1·90 1·90 1·88 1·88 1403
1904
January 6 1·66 1·78 1·78 1·78 1·75 1508
„ 20 1·54 1·48 1·48 1·48 1·55 1466
Table XXII.—Observed discharges of the Blue Nile at Khartoum referred to the Wad-Medani and Khartoum gauges.
1902
Date of Discharge. WAD MEDANI GAUGES Discharge m³ per second. Khartoum gauges. Remarks.
2 days before. 1 day before. Date of dis- charge.
9 May ·39 ·39 ·37 184 -0·05
23 „ ·71 ·61 ·65 194 0·16
6 June 2·07 2·03 1·97 604 0·76
20 „ 2·97 3·27 3·39 695 1·06
27 „ 3·04 3·89 4·29 837 1·30
4 July 3·80 3·70 3·80 1032 1·75
11 „ 4·56 4·38 4·48 1453 2·07
18 „ 4·80 5·10 5·20 1612 2·33
25 „ 5·70 5·66 5·76 1885 2·64
1 August 7·06 7·28 7·56 3420 3·34
8 „ 8·56 8·76 8·86 4880 4·20
15 „ 9·14 9·02 8·96 4720 4·50
22 „ 10·08 10·00 9·66 5540 4·93
29 „ 10·46 10·52 10·32 7180 5·34
5 September 10·42 10·32 10·30 6580 5·27
12 „ 10·40 10·28 10·60 5800 5·35
19 „ 10·32 10·00 10·30 5760 5·30
26 „ 10·00 10·10 9·90 4800 5·10
3 October 9·94 9·88 9·70 4880 5·03
10 „ 8·40 8·20 8·00 3250 3·45
17 „ 7·38 7·48 7·40 2460 3·73
24 „ 6·94 6·88 6·78 2030 3·40
31 „ 6·18 6·14 6·04 1244 3·00
7 November 5·66 5·60 5·50 1272 2·77
14 „ 5·10 5·06 5·00 1035 2·48
21 „ 4·74 4·74 4·70 802 2·23
28 „ 4·56 4·54 4·46 787 2·11
5 December 4·08 4·04 4·00 654 1·94
12 „ 3·73 3·74 3·66 486 1·80
23 „ 3·43 3·32 3·26 476 1·58
1903
2 January 2·90 2·88 2·84 348 1·39
9 „ 2·64 2·60 2·58 270 1·22
16 „ 2·48 2·46 2·44 248 1·09
23 „ 2·34 2·32 2·30 250 0·94
6 February 2·06 2·04 2·04 226 0·60
20 „ 1·86 1·84 1·84 152 0·39
6 March 1·60 1·60 1·58 202 0·18
20 „ 1·36 1·34 1·34 201 0·04
3 April 1·24 1·20 1·20 132 0̅·12
17 „ 1·08 1·04 1·04 154 0̅·16
1 May 0·98 0·98 0·96 121 0̅·16
8 „ 0·88 0·88 0·90 Nil 0̅·23
15 „ 0·88 0·92 0·98 „ 0̅·26
22 „ 1·40 1·66 1·70 „ 0̅·09
28 „ 2·74 1·51 3·43 374 0·53
6 June 4·05 3·61 3·65 970 1·40
19 „ 4·70 4·62 4·52 1500 1·90
26 „ 4·25 4·51 4·31 1089 1·58
3 July 4·71 5·27 5·61 1314 1·78
10 „ 6·45 6·55 6·67 1952 2·48
17 „ 6·74 6·57 6·91 2267 2·75
24 „ 7·97 7·81 7·87 3183 3·40
31 „ 7·77 7·67 7·70 2870 3·45
5 August 9·81 10·11 10·11 7584 4·60
10„ 10·15 9·99 9·89 7100 5·06
14„ 10·59 10·71 10·57 9340 5·65
21„ 10·49 10·73 10·71 9519 5·90
28„ 10·47 10·41 10·61 9544 ?
4 September 10·68 10·44 10·40 8474 6·20
11„ 10·74 10·52 10·46 8385 6·15
18„ 9·94 9·92 9·96 7070 5·88
25„ 10·52 10·46 10·32 8965 6·08
2 October 9·22 9·48 9·36 6581 5·53
9„ 9·14 9·04 8·64 5749 5·15
16„ 7·97 7·94 8·07 3812 4·45
23„ 8·90 8·64 8·54 4198 4·56
30„ 7·53 7·33 7·29 2893 4·00
6 November 6·86 6·68 6·32 2275 3·50
13„ 6·00 5·90 5·70 1790 3·10
20„ 5·71 5·65 5·55 1456 2·65
4 December 4·90 4·88 4·84 1102 2·35
18„ 4·36 4·30 4·28 789 1·90
25„ 3·90 3·88 3·84 722 1·88
1904
1 January 3·60 3·66 3·64 604 1·80
15„ 3·40 3·38 3·36 488 1·59
Table XXIII.—Observed discharges of the Atbara referred to the Khasm El Girba gauge.
1903
Date of Discharge. Gauges Dis- charge m³ per second. Remarks
5 days before. 4 days before. 3 days before. 2 days before. 1 day before. Date of dis- charge.
16 July 2·65 2·31 2·10 2·10 2·65 2·28 381
23 „ 2·37 2·55 2·74 2·83 2·70 2·70 538
27 „ 2·70 2·70 3·00 2·62 2·53 2·60 780
2 August 2·76 2·80 3·29 3·54 4·21 4·00 758
5„ 3·54 4·21 4·00 3·56 3·25 3·35 1448
14„ 3·29 3·72 4·61 4·37 4·53 4·60 2318
15„ 3·72 4·61 4·37 4·53 4·60 4·85 2931
27„ 5·12 4·82 4·54 4·35 4·20 4·80 2632
30„ 4·35 4·20 4·80 4·55 4·55 4·75 3088
5 September 4·45 4·52 4·52 4·60 4·70 4·55 2822
12„ 4·58 4·50 4·15 4·30 3·89 3·95 2091
18„ 3·80 3·84 3·71 3·88 4·36 4·20 1672
25„ 4·12 3·80 4·45 3·30 3·25 3·10 1267
28„ 3·30 3·25 3·10 2·89 3·42 3·10 902
2 October 3·42 3·10 3·13 3·05 2·88 2·78 925
4„ 3·13 3·05 2·88 2·78 2·78 2·90 754
5„ 3·05 2·88 2·78 2·78 2·90 2·75 703
Appendix G. TABLES GIVING MEAN MONTHLY DISCHARGES OF THE NILE AND ITS TRIBUTARIES DURING 1902, 1903 AND 1904.
TABLE XXIV.—Mean discharges of the Nile tributaries in cubic metres per second at the various gauge stations in 1902, 1903, 1904.
1902
Month. Victoria Nile at Ripon Falls. Albert Nile Gazelle river app. Sobat river. White Nile at Tewfikia. White Nile at Khartoum. Blue Nile at Khartoum. Atbara river. Total for: White, Blue and Atbara rivers. Nile at: Halfa = 1st Jan.- 1st July. Assuân = 1st July- 1st Jan. Rosetta branch. Damietta branch.
Wadelai. Gondo- koro. Above Sobat junction.
January 510 620 660 .. .. .. .. 950 280 0 1230 1100 1000 20
February 510 580 640 .. .. .. .. 550 240 0 790 720 290 40
March 500 570 660 .. .. .. .. 420 190 0 610 600 40 40
April 530 540 550 .. .. .. .. 370 190 0 560 530 0 0
May 560 560 630 .. .. .. .. 350 180 0 530 510 0 0
June 550 550 550 .. .. .. .. 600 600 50 1250 550 0 0
July 530 560 600 .. .. .. .. 900 1500 500 2900 1100 0 0
August 520 580 1000 340 .. 570 910 [11]600 5000 1200 6300 3600 800 400
September 510 610 820 420 .. 810 1230 [11]600 6200 1200 8000 6600 2600 400
October 490 640 780 .. .. .. .. 900 2800 80 3780 4950 2500 1300
November 500 710 900 .. .. .. .. 850 1000 0 1850 2400 1400 700
December 490 740 860 .. .. .. .. 1202 500 0 1700 1700 1600 140
Year 520 600 720 .. .. .. .. 690 1560 250 2500 2030 850 340
1903
January 530 710 760 400 0 600 1000 1000 300 0 1300 1300 1300 20
February 610 680 740 370 0 230 600 600 240 0 840 880 500 20
March 630 660 700 350 0 130 480 500 180 0 680 620 100 30
April 650 640 700 360 0 40 400 420 120 0 540 480 0 0
May 740 670 900 390 0 100 490 420 280 0 700 440 0 0
June 800 710 1020 400 0 320 720 600 1200 200 2000 630 0 0
July 840 760 1100 410 10 410 820 [11]700 2500 600 3800 1400 0 150
August 790 820 1600 420 10 680 1100 [11]400 8200 2300 10900 5700 1500 300
September 730 870 2100 430 20 870 1300 [11]600 8200 1500 10300 8600 3300 2000
October 770 970 1900 360 30 1040 1400 1700 4500 0 6200 6300 3500 2200
November 810 1040 1700 350 30 1080 1430 1600 1700 0 3200 3400 2500 1600
December 810 1060 1200 380 30 1080 1460 1450 800 0 2253 2000 1100 800
Year 730 800 1200 390 10 550 940 830 2350 380 3560 2650 1150 590
1902
Month. Victoria Nile at Ripon Falls. Albert Nile Gazelle river app. Sobat river. White Nile at Tewfikia.
Wadelai. Gondo- koro. Above Sobat junction.
January 510 620 660 .. .. .. ..
February 510 580 640 .. .. .. ..
March 500 570 660 .. .. .. ..
April 530 540 550 .. .. .. ..
May 560 560 630 .. .. .. ..
June 550 550 550 .. .. .. ..
July 530 560 600 .. .. .. ..
August 520 580 1000 340 .. 570 910
September 510 610 820 420 .. 810 1230
October 490 640 780 .. .. .. ..
November 500 710 900 .. .. .. ..
December 490 740 860 .. .. .. ..
Year 520 600 720 .. .. .. ..
1902
Month. White Nile at Khartoum. Blue Nile at Khartoum. Atbara river. Total for: White, Blue and Atbara rivers. Nile at: Halfa = 1st Jan.- 1st July. Assuân = 1st July- 1st Jan. Rosetta branch. Damietta branch.
January 950 280 0 1230 1100 1000 20
February 550 240 0 790 720 290 40
March 420 190 0 610 600 40 40
April 370 190 0 560 530 0 0
May 350 180 0 530 510 0 0
June 600 600 50 1250 550 0 0
July 900 1500 500 2900 1100 0 0
August [11]600 5000 1200 6300 3600 800 400
September [11]600 6200 1200 8000 6600 2600 400
October 900 2800 80 3780 4950 2500 1300
November 850 1000 0 1850 2400 1400 700
December 1202 500 0 1700 1700 1600 140
Year 690 1560 250 2500 2030 850 340
1903
Month. Victoria Nile at Ripon Falls. Albert Nile Gazelle river app. Sobat river. White Nile at Tewfikia.
Wadelai. Gondo- koro. Above Sobat junction.
January 530 710 760 400 0 600 1000
February 610 680 740 370 0 230 600
March 630 660 700 350 0 130 480
April 650 640 700 360 0 40 400
May 740 670 900 390 0 100 490
June 800 710 1020 400 0 320 720
July 840 760 1100 410 10 410 820
August 790 820 1600 420 10 680 1100
September 730 870 2100 430 20 870 1300
October 770 970 1900 360 30 1040 1400
November 810 1040 1700 350 30 1080 1430
December 810 1060 1200 380 30 1080 1460
Year 730 800 1200 390 10 550 940
1903
Month. White Nile at Khartoum. Blue Nile at Khartoum. Atbara river. Total for: White, Blue and Atbara rivers. Nile at: Halfa = 1st Jan.- 1st July. Assuân = 1st July- 1st Jan. Rosetta branch. Damietta branch.
January 1000 300 0 1300 1300 1300 20
February 600 240 0 840 880 500 20
March 500 180 0 680 620 100 30
April 420 120 0 540 480 0 0
May 420 280 0 700 440 0 0
June 600 1200 200 2000 630 0 0
July [11]700 2500 600 3800 1400 0 150
August [11]400 8200 2300 10900 5700 1500 300
September [11]600 8200 1500 10300 8600 3300 2000
October 1700 4500 0 6200 6300 3500 2200
November 1600 1700 0 3200 3400 2500 1600
December 1450 800 0 2253 2000 1100 800
Year 830 2350 380 3560 2650 1150 590
1904
Month. Victoria Nile at Ripon Falls. Albert Nile Gazelle river app. Sobat river. White Nile at Tewfikia. White Nile at Khartoum. Blue Nile at Khartoum. Atbara river. Total of: White, Blue and Atbara rivers. Nile at Assuân in flood. At Halfa in low supply. Rosetta branch. Damietta branch.
Wadelai. Gondo- koro. Above Sobat junction.
February .. 1030 1060 430 20 230 660 800 300 0 1100 1300 850 110
March .. 1000 1020 430 20 130 560 520 210 0 730 850 110 250
April .. 1000 1060 430 10 100 530 500 200 0 700 650 0 80
May .. .. 1200 430 0 160 590 500 300 0 800 600 0 10
June .. .. 1200 [11]400 0 290 690 550 500 50 1050 950 0 30
July .. .. .. .. .. .. .. .. 2600 800 .. 1100 30 80
August .. .. .. .. .. .. .. .. 5500 1100 .. 5900 2000 1000
September .. .. .. .. .. .. .. .. .. 700 .. .. .. ..
October .. .. .. .. .. .. .. .. .. .. .. .. .. ..
November .. .. .. .. .. .. .. .. .. .. .. .. .. ..
December .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Year .. .. .. .. .. .. .. .. .. .. .. .. .. ..
1904
Month. Victoria Nile at Ripon Falls. Albert Nile Gazelle river app. Sobat river. White Nile at Tewfikia.
Wadelai. Gondo- koro. Above Sobat junction.
February .. 1030 1060 430 20 230 660
March .. 1000 1020 430 20 130 560
April .. 1000 1060 430 10 100 530
May .. .. 1200 430 0 160 590
June .. .. 1200 [11]400 0 290 690
July .. .. .. .. .. .. ..
August .. .. .. .. .. .. ..
September .. .. .. .. .. .. ..
October .. .. .. .. .. .. ..
November .. .. .. .. .. .. ..
December .. .. .. .. .. .. ..
Year .. .. .. .. .. .. ..
1904
Month. White Nile at Khartoum. Blue Nile at Khartoum. Atbara river. Total of: White, Blue and Atbara rivers. Nile at Assuân in flood. At Halfa in low supply. Rosetta branch. Damietta branch.
February 800 300 0 1100 1300 850 110
March 520 210 0 730 850 110 250
April 500 200 0 700 650 0 80
May 500 300 0 800 600 0 10
June 550 500 50 1050 950 0 30
July .. 2600 800 .. 1100 30 80
August .. 5500 1100 .. 5900 2000 1000
September .. .. 700 .. .. .. ..
October .. .. .. .. .. .. ..
November .. .. .. .. .. .. ..
December .. .. .. .. .. .. ..
Year .. .. .. .. .. .. ..
Appendix H
Table XXV.—Minimum and Maximum Discharges of the Nile and its tributaries in 1902 and 1903.
1902
Name of River. Locality. Minimum Summer Discharge m³ per second Maximum Flood Discharge m³ per second
Date. Discharge. Date. Discharge.
Victoria Nile Ripon Falls December 480 May 580
Albert Nile Wadelaï April 5th 530 Dec. 10th 760
„ Gondokoro April 15th 540 Aug. 24th 1360
„ Above Sobat .. .. .. ..
Sobat Mouth .. .. .. ..
White Nile Tewfikieh April app: 340 .. ..
„ Duem May, 11th 340 Dec. 29th 1500
Blue Nile Khartoum April 15th 180 Aug. 29th 7200
Atbara Mouth .. .. Sept. 8th 2020
Nile Wadi Haifa June 2nd 490 .. ..
Assuân .. .. Sept. 17th 7000
1903
Victoria Nile Ripon Falls January 490 July 830
Albert Nile Wadelaï April 5th 630 December 1070
„ Gondokoro April 10th 680 Sept. 23rd 2600
„ Above Sobat April 430 .. 430
Sobat Mouth April 15th 40 Sept. 15th 1040
White Nile Tewfikieh April 380 Dec. 15th 1470
„ Duem May 9th 400 Nov. 15th 1670
Blue Nile Khartoum May 5th 100 Aug. 28th 9600
Atbara Mouth .. .. Aug. 30th 3100
Nile Wadi Haifa May 21st 420 .. ..
Assuân .. .. Sept. 12th 9000
Appendix I.
Table XXVI.—Table of mean monthly Discharges at Khartoum, Assuân and Cairo, for the maximum, minimum and mean years.
Month 1877-78 Minimum Year 1878-79 Maximum Year Mean of 20 Years
Blue Nile at Khar- toum. Assuân. Cairo. Blue Nile at Khar- toum. Assuân. Cairo. Blue Nile at Khar- toum. Assuân. Cairo.
June 1000 800 600 1000 500 250 1000 750 500
July 2800 2400 1100 3500 2000 900 2800 2200 1100
August 5300 5600 3900 8200 7900 5200 7000 7900 5300
September 4700 5900 4400 12500 12100 8600 8500 9200 7200
October 2500 4000 3900 8000 9300 10300 4500 6000 6900
November .. 2400 2550 .. 4700 6500 .. 3300 3700
December .. 1500 1600 .. 3200 3600 .. 2200 2300
January .. 1200 1300 .. 2400 2600 .. 1600 1600
February .. 800 800 .. 2100 2100 .. 1200 1200
March .. 600 550 .. 1900 1900 .. 850 800
April .. 500 400 .. 1600 1600 .. 700 620
May .. 400 300 .. 1500 1500 .. 600 520
Mean .. 2175 1783 .. 4100 3754 .. 3041 2645
Note.—The very high discharges at Assuân and Cairo in April and May 1879; the minimum discharge of that year was about 1500 cubic metres per second. There has never been any discharge like that since.
Appendix J. DISCHARGE TABLES OF THE DIFFERENT GAUGES OF THE NILE AND ITS TRIBUTAIRIES.
Table XXVII.—Discharges table of the Victoria Nile at the Ripon Falls.
Gauge. Discharge m³ per second. Remarks.
0·0 380 This discharge table is the mean of two alternative tables; one assuming that the width of the sill of the Ripon Falls was 127 metres as stated by Sir William Garstin, the other assuming that only half this width was the working sill, the rest being more or less shallow water. The constant has been taken as ·57. Sir William Garstin makes the width of the sill 70 + 40 + 13 = 127 metres, while Chavanne gives it as 82 + 14 + 55 + 22 = 173 metres. The wider the sill, the quicker is the rise of discharge from the measured discharge at the gauge of ·51.
·1 410
·2 450
·3 480
·4 520
·5 550
·6 580
·7 620
·8 660
·9 700
1·0 740
·1 780
·2 820
·3 860
·4 900
·5 950
·6 990
·7 1040
·8 1090
·9 1140
2·0 1190
Table XXVIII.—Discharge table of the Albert Nile at Wadelaï.
Gauge. Discharge cubic metres per second. Gauge. Discharge cubic metres per second. Gauge. Discharge cubic metres per second.
0·0 520 1·0 780 2·0 1090
·1 544 ·1 810 ·1 1104
·2 568 ·2 840 ·2 1118
·3 592 ·3 870 ·3 1132
·4 616 ·4 900 ·4 1146
·5 640 ·5 930 ·5 1160
·6 668 ·6 962 .. ..
·7 696 ·7 994 .. ..
·8 724 ·8 1026 .. ..
·9 752 ·9 1058 .. ..
Table XXIX.—Discharge Table of the Albert Nile at the Gondokoro gauge.
Gauge. Discharge cubic metres per second. Remarks.
0·0 550 There is a scour of a metre and upwards at this gauge site during a high flood. The pit is apparently filled with sand during a low flood.
·2 600
·4 660
·6 740
·8 820
1·0 900
·2 1060
·4 1220
·6 1380
·8 1540
2·0 1700
·2 1900
·4 2100
·6 2300
·8 2500
3·0 2700
Table XXX.—Discharge table of the Albert Nile at the Mongalla gauge, 32 kilometres north of Gondokoro.
Gauge. Discharge cubic metres per second. Gauge. Discharge cubic metres per second. Remarks.
0·0 500 2·0 1100 This is a better site than Gondokoro.
·2 540 ·2 1300
·4 580 ·4 1500
·6 620 ·6 1700
·8 660 ·8 1900
1·0 700 3·0 2100
·2 780 ·2 2300
·4 860 ·4 2500
·6 940 ·6 2700
·8 1020 .. ..
Table XXXI.—Discharge table of the Sobat river at Dulaib Hilla.
Gauge. Discharge in m³ per second.
0·0 30
·2 58
·4 86
·6 112
·8 142
1·0 170
·2 218
·4 266
·6 314
·8 362
2·0 410
·2 500
·4 590
·6 680
·8 790
3·0 860
·2 950
·4 1040
·6 1130
·8 1220
4·0 1310
This gauge is in backwater when the north end of the Sudd region is flooded.
Table XXXII.—Discharge Table of the White Nile at Tewfikieh downstream of Sobat junction referred to Tewfikia Gauge.
Gauge. Discharge in m³ per second.
-1·0 150
0·0 330
·2 376
·4 422
·6 468
·8 514
1·0 560
·2 616
·4 672
·6 728
·8 784
2·0 840
·2 906
·4 972
·6 1038
·8 1104
3·0 1170
·2 1270
·4 1370
·6 1470
·8 1570
4·0 1670
·2 1770
·4 1870
·6 1970
·8 2070
5·0 2170
Table XXXIII.—Discharge Table of the White Nile at Duem in Winter and Summer when the Blue Nile is low.
Gauge. Discharge in m³ per second. Remarks.
0·0 330 This gauge is in backwater when the Blue Nile is high.
·1 354
·2 370
·3 402
·4 426
·5 450
·6 480
·7 515
·8 555
·9 600
1·0 650
This table is only very approximative.
Table XXXIV.—Discharge table of the Blue Nile at Wad Medani.
Gauge. Discharge in m³ per second
River rising. River Falling and Stationary.
0·0 50 50
·2 80 64
·4 110 78
·6 140 92
·8 170 106
1·0 200 120
·2 240 146
·4 280 172
·6 320 198
·8 360 224
2·0 400 250
·2 450 284
·4 500 318
·6 550 352
·8 600 380
3·0 650 420
·2 720 406
·4 790 512
·6 860 558
·8 930 604
4·0 1000 650
·2 1100 720
·4 1200 790
·6 1300 860
·8 1400 930
5·0 1500 1000
·2 1630 1100
·4 1760 1200
·6 1890 1300
·8 2020 1400
6·0 2150 1500
·2 2320 1620
·4 2490 1740
·6 2600 1800
·8 2830 1980
7·0 3000 2100
·2 3200 2340
·4 3400 2580
·6 3600 2820
·8 3800 3060
8·0 4000 3300
·2 4300 3540
·4 4600 3780
·6 4900 4020
·8 5200 4200
9·0 5500 4500
·2 5900 4840
·4 6300 5180
·6 6700 5520
·8 7100 5860
10·0 7500 6200
·2 8000 6580
·4 8500 6960
·6 9000 7340
·8 9500 7720
11·0 10000 8100
·2 10600 8540
·4 11200 8980
·6 11800 9420
·8 12400 9800
12·0 13000 10300
(1) These discharges include the Rahad river. They represent the discharges below the Rahad river junction referred to the Wad Medani gauge.
(2) During a high flood the river scours, and it silts during a low flood; consequently for exact discharges below 5 metres, the section of the river should be taken annually in December.
Table XXXV.—Discharge Table of the Blue Nile at the Khartoum Gauge.
Gauge. River rising River falling and Stationary
Discharge in m³ per second. Discharge in m³ per second.
- ·2 100 100
+0·0 175 120
·2 260 145
·4 360 170
·6 470 195
·8 580 220
1·0 700 250
·2 860 340
·4 1020 430
·6 1180 520
·8 1340 610
2·0 1500 700
·2 1720 880
·4 1940 1060
·6 2160 1240
·8 2380 1420
3·0 2600 1600
·2 2980 1840
·4 3360 2080
·6 3740 2320
·8 4120 2560
4·0 4500 2800
·2 4980 3180
·4 5460 3560
·6 5940 3940
·8 6420 4320
5·0 6900 4700
·2 7560 5220
·4 8220 5740
·6 8880 6260
·8 9540 6780
6·0 10200 7300
·2 11000 7940
·4 11800 8580
·6 12600 9220
·8 13400 9860
7·0 14200 10500
·2 ... 11140
·4 ... 11780
·6 ... 12420
This gauge is in backwater when the White Nile is discharging more than the Blue Nile.
Table XXXVI.—Discharge Table of the Atbara river referred to the Khasm el Girba Gauge.
Gauge. Discharge.
0·0 0·0
·2 20
·4 40
·6 60
·8 80
1·0 100
·2 150
·4 200
·6 250
·8 300
2·0 350
·2 444
·4 538
·6 632
·8 726
3·0 820
·2 1012
·4 1204
·6 1396
·8 1588
4·0 1780
·2 2078
·4 2376
·6 2674
·8 2972
5·0 3270
·2 3596
·4 3922
·6 4248
·8 4574
6·0 4900
Table XXXVII.—Discharge table for the Assuân, Assiut and Cairo Gauges.
The gauges are in metres and are referred to mean low-water level as zero.
The zero is:
at Assuân R. L. 85·00
at Assiut „ 45·55
at Cairo „ 12·25
N.B.—At Assiut R. L. 45·55, according to the reservoir levels, is R. L. 45·05 according to the 4th Circle levels.
(The discharges are in cubic metres per second.)
This discharge table may be used approximately for any gauge on the Nile north of Assuân with its zero at mean low-water level; adding ·5 to the gauge in Kena Province, and deducting ·5 from the gauge in Minieh and Beni-Suef.
If the river is rising, take the discharge corresponding to the higher gauge; if falling or stationary to the lower one.
Gauge. Discharge.
-1·0 360
- ·8 406
- ·6 452
- ·4 498
- ·2 544
0·0 590
·2 668
·4 746
·6 824
·8 902
1·0 980
·2 1086
·4 1192
·6 1298
·8 1404
2·0 1510
·2 1652
·4 1794
·6 1936
·8 2078
3·0 2220
·2 2408
·4 2596
·6 2784
·8 2972
4·0 3160
·2 3404
·4 3648
·6 3892
·8 4136
5·0 4380
·2 4674
·4 4968
·6 5262
·8 5556
6·0 5850
·2 6150
·4 6450
·6 6800
·8 7200
7·0 7600
·2 8000
·4 8400
·6 8800
·8 9300
8·0 9800
·2 10300
·4 10900
·6 11500
·8 12100
9·0 12800
·2 13600
Table XXXVIII.
Discharge Table of the Wady Halfa Gauge, for use at Assuân when the Assuân Dam is being regulated on, and consequently the Assuân Gauge no longer represents the normal discharge of the Nile. At this stage of the river it may be assumed that the water travels normally between Wady Halfa and Assuân in 3 or 4 days.
Gauge. Discharge cubic metres per second.
0·8 370
1·0 440
·2 516
·4 592
·6 688
·8 804
2·0 920
·2 1048
·4 1176
·6 1314
·8 1462
3·0 1610
·2 1800
·4 1990
·6 2180
·8 2370
4·0 2560
·2 2802
·4 3044
·6 3286
·8 3528
5·0 3770
Table XXXIX.—Discharge of the Rosetta Branch of the Nile referred to the Delta Barrage north of Cairo.
1890
Gauge. Discharge m³ per second.
0·00 0
·25 50
·50 100
·75 150
1·00 200
·25 287
·50 375
·75 463
2·00 550
·25 700
·50 850
·75 1000
3·00 1150
·25 1312
·50 1475
·75 1638
4·00 1800
·25 1975
·50 2150
·75 2325
5·00 2500
·25 2700
·50 2900
·75 3100
6·00 3300
·25 3525
·50 3750
·75 3975
7·00 4200
·25 4450
·50 4700
·75 4950
8·00 5200
·25 5475
·50 5750
·75 6025
9·00 6300
Zero of the gauge R. L. 10·00 metres above mean sea.
Table XL.—Discharge of the Damietta Branch of the Nile referred to the Delta Barrage north of Cairo.
1890
Gauge. Discharge m³ per second.
0·00 0
·25 20
·50 40
·75 60
1·00 80
·25 110
·50 140
·75 170
2·00 200
·25 262
·50 325
·75 388
3·00 450
·25 537
·50 625
·75 712
4·00 800
·25 925
·50 1050
·75 1175
5·00 1300
·25 1450
·50 1600
·75 1750
6·00 1900
·25 2075
·50 2250
·75 2425
7·00 2600
·25 2800
·50 3000
·75 3200
8·00 3400
·25 3625
·50 3850
·75 4075
9·00 4300
Note.—Zero of the gauge R. L. 10·00 metres above mean sea.
Appendix K. TABLES GIVING DETAILED INFORMATION ABOUT THE NILE BETWEEN ASSUÂN AND CAIRO.
Table XLI.—Date of Heights of Minimum gauges in summer and Maximum gauges in flood at Assuan.
Year. Minimum summer Maximum flood
Date. Gauge. Date. Gauge.
1873 5 June -0·37 1 September 7·66
1874 30 May -0·64 6 September 8·97
1875 23 May -0·17 11 September 8·36
1876 15 June +0·13 7 September 8·68
1877 27 May +0·10 20 August 6·40
1878 23 June -0·71 1 October 9·15
1879 23 May +1·88 13 September 8·59
1880 9 June +0·82 4 September 7·82
1881 14 May +0·00 4 September 8·14
1882 23 June -0·55 28 August 8·00
1883 22 June +0·04 17 September 8·18
1884 27 May +0·37 1 September 7·73
1885 21 June -0·44 28 August 8·05
1886 3 June -0·06 22 September 8·04
1887 8 May -0·03 1 September 8·81
1888 8 June -0·08 24 August 7·08
1889 24 June -0·60 2 September 8·36
1890 8 June -0·60 2 September 8·72
1891 19 May -0·21 27 September 7·84
1892 18 June -0·64 20 September 8·88
1893 18 June +0·35 14 September 7·75
1894 16 June +0·06 18 September 8·61
1895 23 June +0·78 10 September 8·68
1896 13 June +0·49 3 September 8·63
1897 31 May +0·62 1 September 7·80
1898 23 June -0·25 29 August 8·63
1899 1 June +0·15 4 September 6·67
1900 15 May -0·93 19 August 7·91
1901 10 May -0·46 6 September 7·82
1902 12 May -0·48 17 September 6·72
1903 16 April -0·68 27 August 7·93
1904 5 June -0·20 13 August 6·97
Zero is R. L. 85·00 metres or mean low water level.
Table XLII.—Table giving areas of cross sections of the Nile, from Assuân to Cairo.
Locality. Length in kilo- metres. MEAN AREA IN SQUARE METRES
Below zero. Below 6 metres. Below 7 metres. Below 8 metres. Below 8.5 metres. Below 9 metres.
Assuân to Ramâdi 81 1024 4930 5808 6754 7337 7993
Ramâdi to Esna 76 674 4554 5461 6398 6966 7695
Esna to Kena 115 852 4476 5336 6221 6726 7363
Kena to Sohâg 158 973 4718 5600 6535 7121 7873
Sohâg to Assiout 98 1037 5220 6305 7705 8683 9749
Assiout to Minia 138 899 5149 6205 7783 8845 9937
Minia to Beni-Suêf 117 915 5035 6007 7315 8196 9140
Beni-Suêf to Koshesha 34 665 5040 6080 7532 8379 9247
Koshesha to Cairo 81 1031 5364 6388 7813 8648 9495
Cairo to the Barrage 24 1402 5414 6628 8346 9258 10184
Assuân to Assiout 528 920 4760 5680 6690 7310 8080
Assiout to Koshesha 289 870 5080 6100 7550 8510 9520
Koshesha to Cairo 81 1030 5360 6380 7810 8640 9490
Assuân to Cairo 898 910 4930 5890 7080 7830 8690
Table XLIII.—Table of the cubic contents of the trough of the Nile from Assuân to Cairo in millions of cubic metres.
Locality. Length in kilo- metres. CONTENTS IN MILLIONS OF CUBIC METRES CONTENTS IN MILLIONS OF CUBIC METRES
Below zero. From zero to 6.0 From 6.0 to 7.0 7.0 to 8.0 8.0 to 8.5 8.5 to 9.0 Below zero. Below 6.0 Below 7.0 Below 8.0 Below 8.5 Below 9.0
Assuân to Ramadi 81 83 316 711 77 47 53 83 399 470 547 594 647
Ramadi to Esna 76 51 295 69 71 43 56 51 346 415 486 529 585
Esna to Kena 115 98 417 99 102 58 73 98 514 614 715 773 847
Kena to Sohag 128 154 592 139 148 83 119 154 745 885 1032 1125 1244
Sohag to Assiout 98 102 410 106 137 96 104 102 512 618 755 851 955
Assiout to Minieh 138 124 586 146 218 147 151 124 710 856 1074 1220 1371
Minieh to Beni Suêf 117 107 482 114 153 103 110 107 589 703 856 859 1069
Beni Suêf to Kushesha 34 23 149 35 49 29 29 23 171 207 256 285 314
Kushesha to Cairo 81 84 351 83 115 68 69 84 434 517 633 700 769
Cairo to the Barrage 28 34 96 29 41 22 22 34 130 159 200 222 244
Assuân to Assiout 528 487 2030 484 534 327 405 487 2517 3001 3535 3862 4267
Assiout to Kushesha 289 254 1217 295 420 278 291 254 1471 1766 2186 2464 2755
Kushesha to Cairo 81 84 351 83 115 68 69 84 435 518 633 701 770
Assuân to Cairo 898 825 3598 862 1069 673 765 825 4423 5285 6354 7027 7792
Table XLIV.—Widths of water surface from Assuân to Cairo.
From. To. Mean width of water surface
0 6·0 7·0 8·0 8·5 9·0
Assuân Ramadi 400 840 880 1030 1270 1400
Ramadi Esna 340 850 890 1030 1260 1620
Esna Kena 350 820 850 940 1120 1400
Kena Sohag 380 870 890 1000 1300 1560
Sohag Assiout 400 1000 1170 1720 2080 2170
Assiout Minieh 390 970 1180 1890 2060 2080
Minieh Beni Suêf 490 960 1300 1550 1800 1840
Beni Suêf Kushesha 500 1000 1390 1690 1720 1730
Kushesha Cairo 450 960 1100 1570 1700 1700
Cairo Barrage 440 940 1460 1840 1860 1890
Assuân Assiout 370 880 940 1140 1410 1630
Assiout Kushesha 460 980 1290 1710 1860 1880
Kushesha Cairo 450 960 1100 1570 1700 1700
Assuân Cairo 430 940 1110 1470 1660 1740
Area of water surface in millions of square metres.
Assuân Assiout 200 470 500 600 740 860
Assiout Cairo 130 280 370 490 540 540
Assuân Cairo 400 840 1000 1320 1490 1560
Table XLV.—Slope of water surface in the Nile. Assuân to Cairo.
From. To. Distance in kilo- metres down the centre line of the flood. Distance in kilo- metres down the summer channel. Slope in flood. Slope in summer.
Assuân Silsila 70 72 1⁄11500 1⁄12600
Silsila Kasr-es-Saad 250 258 1⁄14800 1⁄14800
Kasr-es-Saad Khazindaria 150 159 1⁄12300 1⁄13400
Khazindaria Assiout 60 63 1⁄11800 1⁄14500
Assiout Beni Mazâr 180 196 1⁄11000 1⁄11800
Beni Mazâr Ashmant 90 94 1⁄11000 1⁄11400
Ashmant Cairo 100 106 1⁄11600 1⁄12300
Cairo Barrage 23 25 1⁄10800 1⁄20000
Assuân Cairo 900 948 1⁄12200 1⁄13000
Table XLVI.—Mean low water level of the Nile—Assuân to Cairo.
Distance from Assuân along centre of flood. Name of Locality. R. L. According to reservoir levels. R. L. According to inspectors of irrigation. Distance from Assuân along summer Channel.
0 Assuân 85·0 85·0 0
70 Gebel Silsila 79·3 79·4 72
106 Edfu 76·7 77·0 ..
157 Esna 73·1 72·6 ..
194 Armant 70·1 69·6 ..
213 Luxor 69·0 68·5 ..
272 Kena 65·3 64·8 ..
320 Kasr-es-Saad 61·7 61·2 330
328 Heu 61·2 60·7 ..
333 Naga Hamadi 61·0 60·5 ..
365 Abu Shusha 58·6 58·1 ..
373 Balyana 58·3 57·8 ..
390 Girga 56·9 56·5 ..
429 Sohâg 53·8 53·2 ..
470 Khazindaria 49·9 49·4 489
505 Aboutig Escape 47·7 47·1 ..
530 Assiout[12] 45·55 45·05 552
598 Derut Escape 39·1 38·5 ..
627 Roda 36·3 35·7 ..
666 Minia 32·6 32·0 ..
710 Beni Mazâr 28·9 .. 748
.. Beni Suêf[13] 22·1 21·8 ..
800 Ashmant 20·5 20·2 842
.. Kushesha Escape 18·9 18·6 ..
.. El-Ayât 15·8 15·5 ..
898 Cairo gauge 12·10 12·25 ..
900 Cairo 12·00 12·1 948
Table XLVII.—Discharge table of the Upper Egypt canals.
A low Nile flood is 6·4 metres - at Assuân.
A mean Nile flood is 7·5 „
A high Nile flood is 8·3 „
The discharges of the Upper Egypt canals corresponding to the Assuân gauges are approximately as follows: —
Assuân 6·0 1300
·1 1370
·2 1440
·3 1510
·4 1580 —Low Nile flood.
·5 1650
·6 1620
·7 1790
·8 1860
·9 1930
7·0 2000
·1 2070
·2 2140
·3 2210
·4 2280
·5 2350 —Mean Nile flood.
·6 2420
·7 2490
·8 2560
·9 2630
8·0 2700
·1 2770
·2 2840
·3 2910 —High Nile flood.
·4 2980
·5 3050
·6 3120
·7 3190
·8 3260
·9 3330
9·0 3400
R. L. of zero in R. L. 85·00 metres.
Table XLVIII.—Canal discharges between Assuan and Assiut.
DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1892.
Name of Canal. AUGUST SEPTEMBER
15 20 25 31 5 10 15 20 25 30
Ramadi 55 66 80 76 82 85 89 91 .. ..
Um-Ads 8 9 12 13 16 18 20 .. .. ..
Afsûn 25 29 37 39 42 43 45 .. .. ..
Fadilia 12 26 44 49 52 55 50 .. .. ..
Toukh 10 19 37 42 44 58 60 .. .. ..
Rannan 28 36 53 59 62 67 70 .. .. ..
Dumrania 26 35 56 62 65 70 74 .. .. ..
Rashwania 35 41 58 61 64 70 73 .. .. ..
Kasra 49 62 104 133 138 150 150 .. .. ..
Zarzria 24 30 64 76 77 90 90 .. .. ..
Girgawia 54 59 84 95 96 120 120 .. .. ..
Sohagia 380 386 470 485 492 520 500 .. .. ..
Tahta 44 45 66 75 77 82 85 .. .. ..
Shatura 25 24 39 47 49 45 40 .. .. ..
Ibrahimia 460 440 540 600 640 700 740 .. .. ..
Waladia 6 6 14 20 24 24 24 .. .. ..
Minor Canals 10 15 20 30 30 30 20 .. .. ..
Total left bank 1250 1320 1790 1980 2060 2250 2270 .. .. ..
Kilibia 6 11 17 20 24 28 32 .. .. ..
Maala 5 5 18 22 26 30 32 .. .. ..
Bayadiâ 30 36 62 69 77 85 90 .. .. ..
Shanhuria 46 55 98 108 116 120 125 .. .. ..
Shekhia 5 6 10 11 12 12 12 .. .. ..
Gilasi 19 30 58 64 68 70 72 .. .. ..
Samatha 12 19 41 48 52 60 60 .. .. ..
Tarif 10 15 20 25 25 25 25 .. .. ..
Hawis 15 22 38 41 44 51 56 .. .. ..
Ahaiwia 10 15 20 25 25 25 25 .. .. ..
Isaiwia 35 35 55 60 63 70 70 .. .. ..
Khizindaria 63 62 86 96 98 110 95 .. .. ..
Maanah 35 41 58 67 71 80 85 .. .. ..
Sant 6 7 8 10 10 12 12 .. .. ..
Minor Canals 4 8 12 15 15 15 15 .. .. ..
Total right bank 300 370 600 680 730 800 810 .. .. ..
Total both banks 1550 1690 2390 2660 2790 3050 3080 .. .. ..
Table XLVIII (continued).—Canal discharges between Assiout and Cairo.
DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1892.
Name of Canal. AUGUST SEPTEMBER
15 20 25 31 5 10 15 20 25 30
Beni-Husain 13 16 20 30 35 40 .. .. .. ..
Abu-Bakra 53 38 60 80 85 93 .. .. .. ..
Sultani 18 10 20 37 38 40 .. .. .. ..
Nina 9 5 10 20 20 20 .. .. .. ..
Bahabshin 12 8 14 27 28 33 .. .. .. ..
Magnuna 15 15 22 40 45 45 .. .. .. ..
Kusheha 70 70 70 70 70 70 .. .. .. ..
Zawia 11 7 16 27 28 33 .. .. .. ..
Girza 40 38 70 95 100 100 .. .. .. ..
Zumr 13 12 14 19 20 19 .. .. .. ..
Minor Canals 2 2 4 4 4 4 .. .. .. ..
Total left bank 260 220 320 450 480 500 .. .. .. ..
Aly Bey 14 13 28 33 20 18 .. .. .. ..
Khassâb 19 14 25 35 40 46 .. .. .. ..
Minor Canals 7 6 12 12 14 14 .. .. .. ..
Total right bank 40 30 70 80 80 80 .. .. .. ..
Total both banks 300 250 390 530 560 580 .. .. .. ..
Canal discharges between Assuân and Cairo.
Left bank 1510 1540 2110 2430 2540 2750 .. .. .. ..
Right bank 340 400 670 760 810 880 .. .. .. ..
Total 1850 1940 2780 3190 3390 3630 .. .. .. ..
Assuân gauge 6.7 7.4 8.3 8.3 8.6 8.8 8.7 .. .. ..
Assiout gauge 6.1 5.9 6.8 7.2 7.4 7.7 8.1 .. .. ..
Cairo gauge 5.8 5.5 5.8 6.7 7.0 7.2 7.7 .. .. ..
Table XLIX.—Canal discharges between Assuan and Assiut.
DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1893.
Name of Canal. AUGUST SEPTEMBER OCTOBER
15 20 25 31 5 10 15 20 25 30 5 10 15 25
Ramadi 50 56 58 56 55 60 64 61 64 61 .. .. .. ..
Um-Ads 10 12 12 12 13 14 15 15 15 15 .. .. .. ..
Asfun 28 33 34 33 31 33 35 33 34 33 .. .. .. ..
Fadilia 17 24 26 26 22 24 29 24 22 20 .. .. .. ..
Toukh 19 24 26 27 21 24 24 22 27 26 .. .. .. ..
Rannan 20 26 29 28 25 25 30 27 30 28 .. .. .. ..
Dumrania 33 39 44 43 39 41 46 43 46 44 .. .. .. ..
Rashwania 45 52 60 55 50 53 68 60 65 60 .. .. .. ..
Kasra 70 72 82 79 72 76 87 82 87 82 .. .. .. ..
Zarzuria 38 44 47 46 45 47 52 46 52 46 .. .. .. ..
Gergawia 55 55 59 58 56 56 62 57 62 57 .. .. .. ..
Sohagia 390 380 400 390 350 360 420 390 430 410 .. .. .. ..
Tahta 45 46 47 46 44 45 51 44 52 47 .. .. .. ..
Shatura 20 23 26 25 22 17 28 25 29 28 .. .. .. ..
Ibrahimia 520 520 560 560 540 540 600 580 600 600 .. .. .. ..
Waladia 10 11 12 12 11 11 11 12 12 12 .. .. .. ..
Minor Canals 10 15 20 20 20 20 20 20 20 20 .. .. .. ..
Total left bank 1380 1430 1550 1510 1420 1440 1640 1540 1650 1590 .. .. .. ..
Kilibia 11 13 15 14 14 15 17 16 16 16 .. .. .. ..
Maala 11 12 13 12 13 14 16 16 16 16 .. .. .. ..
Bayadia 36 44 48 46 40 45 52 44 42 30 .. .. .. ..
Shanhuria 56 64 69 63 62 64 70 50 40 30 .. .. .. ..
Shekhia 6 7 9 8 6 6 4 5 6 6 .. .. .. ..
Gilasi 24 32 34 32 29 30 35 31 34 33 .. .. .. ..
Samatha 17 24 27 25 22 24 28 25 27 26 .. .. .. ..
Tarif 12 14 16 15 14 15 17 16 17 16 .. .. .. ..
Hawis 24 27 29 29 27 27 29 27 25 16 .. .. .. ..
Ahaiwia 15 16 16 16 12 12 10 7 4 4 .. .. .. ..
Isawia 30 37 40 37 37 39 40 40 43 40 .. .. .. ..
Khazindaria 60 62 67 66 60 60 66 65 55 50 .. .. .. ..
Maanah 20 30 32 32 29 32 33 34 24 24 .. .. .. ..
Sant 6 6 9 8 7 7 7 7 7 7 .. .. .. ..
Minor Canals 4 7 10 10 10 10 10 10 10 10 .. .. .. ..
Total right bank 340 400 430 410 390 400 430 390 370 320 .. .. .. ..
Total both banks 1720 1830 1980 1920 1810 1840 2070 1930 2020 1910 .. .. .. ..
Table XLIX (continued).—Canal discharges between Assiout and Cairo.
DISCHARGES OF THE CANALS IN UPPER EGYPT IN 1893.
Name of Canal. AUGUST SEPTEMBER OCTOBER
15 20 25 31 5 10 15 20 25 30 5 10 15 20 25
Beni Husain 17 18 19 20 14 12 16 17 17 17 .. .. .. .. ..
Abu-Bakra 63 50 63 64 60 58 68 65 64 64 .. .. .. .. ..
Sultani 17 16 17 17 16 15 17 17 17 17 .. .. .. .. ..
Nina 9 8 9 10 10 9 9 9 9 9 .. .. .. .. ..
Bahabshin 11 9 11 12 12 10 12 11 13 14 .. .. .. .. ..
Magnuna 21 20 20 20 24 23 28 29 30 30 .. .. .. .. ..
Kushâska 70 70 50 30 0 0 0 0 0 0 .. .. .. .. ..
Zawia 11 8 13 12 13 12 13 15 16 17 .. .. .. .. ..
Girza 50 45 50 55 60 60 50 50 40 30 .. .. .. .. ..
Zumr 10 10 10 10 6 6 7 12 14 15 .. .. .. .. ..
Minor Canals 2 2 2 2 2 2 2 2 2 2 .. .. .. .. ..
Total left bank 280 260 260 250 220 210 220 220 220 220 .. .. .. .. ..
Ali bey 16 20 27 28 15 12 15 17 20 20 .. .. .. .. ..
Khassab 20 20 20 22 19 15 19 15 15 18 .. .. .. .. ..
Minor Canals 6 6 6 6 7 7 7 7 7 7 .. .. .. .. ..
Total right bank 40 50 50 60 40 30 40 40 40 50 .. .. .. .. ..
Total both banks 320 310 310 310 260 240 260 260 260 270 .. .. .. .. ..
Canal discharges between Assuan and Cairo.
Left bank 1660 1690 1810 1760 1640 1650 1960 1760 1870 1810 .. .. .. .. ..
Right bank 380 450 480 470 430 430 470 430 410 370 .. .. .. .. ..
Total 2040 2140 2290 2230 2070 2080 2330 2190 2280 2180 .. .. .. .. ..
Assuân gauge 7.0 7.3 7.4 7.3 7.2 7.5 7.6 7.4 7.1 7.3 7.1 7.3 6.9 6.3 6.0
Assiout gauge 6.2 6.2 6.4 6.3 6.2 6.3 6.5 6.5 6.6 6.6 6.4 6.5 6.7 6.7 ..
Cairo gauge 5.8 5.6 5.9 6.0 6.0 5.8 6.0 6.0 6.1 6.3 6.2 6.1 6.4 6.5 2.7
Table L.—Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation.
1874.
Date at Assuân. Gauges at Assuân. Discharges at Assuân. Water con- sumption Assuân to Cairo. Trough of Nile Assuân to Cairo. Discharge at Cairo. Gauges at Cairo. Date at Cairo.
August 5 6·9 7600 -1020 -1000 5580 5·8 10th August.
„ 10 7·4 8600 do do 6580 6·4 15th „
„ 15 8·5 11500 do do 9480 7·8 20th „
„ 20 8·6 11800 do do 9780 7·9 25th „
„ 25 8·7 12100 do do 10080 8·1 31st „
„ 31 8·7 12100 do do 10080 8·2 5th September.
September 5 9·0 12800 do do 10780 8·3 10th „
„ 10 8·8 11800 do 0 10780 8·4 15th „
„ 15 8·7 11500 do +500 10980 8·5 20th „
„ 20 8·4 10600 do do 10080 8·2 25th „
„ 25 8·4 10600 do do 10080 8·2 30th „
„ 30 8·2 10050 do do 9430 7·9 5th October.
October 5 7·9 9300 do do 8780 7·6 10th „
„ 10 7·6 8600 do +700 8280 7·4 15th „
„ 15 7·2 7800 do do 7480 7·0 20th „
„ 20 6·6 6600 do do 6280 6·3 25th „
„ 25 6·2 6000 do do 5680 5·9 31st „
„ 31 5·6 5100 do do 4780 5·3 5th November.
November 5 5·2 4500 do do 4780 4·3 10th „
Table LI.—Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation.
1877
Date at Assuân. Gauges at Assuân. Discharges at Assuân. Water con- sumption Assuân to Cairo. Trough of Nile Assuân to Cairo. Discharge at Cairo. Gauges at Cairo. Date at Cairo.
August 5 4·8 4200 - 800 -300 3100 3·9 10th August.
„ 10 5·4 5100 -1020 do 3780 4·6 15th „
„ 15 5·8 5700 do do 4380 5·0 20th „
„ 20 6·4 6500 do do 5180 5·5 25th „
„ 25 6·1 5800 do do 4480 5·1 31st „
„ 31 6·2 6000 do do 4680 5·2 5th September.
September 5 6·3 6200 do do 4880 5·3 10th „
„ 10 6·1 5800 do +200 4980 5·5 15th „
„ 15 6·1 5700 do do 4880 5·4 20th „
„ 20 6·0 5700 do do 4880 5·4 25th „
„ 25 6·3 6200 do do 5380 5·6 30th „
„ 30 6·1 5800 do do 4980 5·4 5th October.
October 5 5·6 5100 do do 4280 5·0 10th „
„ 10 5·2 4500 do do 3680 4·6 15th „
„ 15 4·9 4200 -950 do 3450 4·4 20th „
„ 20 4·6 3800 -900 do 3100 4·0 25th „
„ 25 4·5 3600 -850 do 2950 3·9 31st „
„ 31 4·0 3100 -800 do 2500 3·5 5th November.
November 5 3·7 2800 -700 do 2300 3·3 10th „
Table LII.—Calculated Cairo gauges corresponding to Assuân gauges if basin irrigation were to be changed into perennial irrigation.
1878
Date at Assuân. Gauges at Assuân. Discharges at Assuân. Water con- sumption Assuân to Cairo. Trough of Nile Assuân to Cairo. Discharge at Cairo. Gauges at Cairo. Date at Cairo.
August 5 5·6 5400 -1020 -800 3580 4·4 10th August.
„ 10 5·3 6500 do do 4680 5·2 15th „
„ 15 7·2 8200 do do 6380 6·3 20th „
„ 20 7·5 8600 do do 6780 6·5 25th „
„ 25 8·1 10000 do do 8180 7·3 31st „
„ 31 7·6 8800 do +800 8580 7·5 5th September.
September 5 8·1 10300 do -600 8580 7·5 10th „
„ 10 8·5 11500 do do 9880 8·0 15th „
„ 15 8·9 12800 do do 11180 8·5 20th „
„ 20 8·9 12500 do do 10880 8·4 25th „
„ 25 9·0 12800 do do 11180 8·5 30th „
„ 30 9·1 13200 do do 11580 8·6 5th October.
October 5 8·9 12100 do +400 11480 8·6 10th „
„ 10 8·5 10900 do +800 10680 8·4 15th „
„ 15 7·9 9300 do do 9080 8·0 20th „
„ 20 7·6 8600 do do 3380 7·4 25th „
„ 25 7·4 8200 do do 7980 7·2 31st „
„ 31 6·8 7000 do do 6780 6·6 5th November.
November 5 6·3 6200 do do 5980 6·1 10th „
Appendix L Gauges of the Nile and its tributaries
Table LIII.—Lake Victoria gauges at Jinja near the Ripon Falls.
Months. 1898 1899 1900 1901 1902 1903 1904
Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean.
January .. .. .. 0·95 0·89 0·90 0·44 0·34 0·39 0·41 0·28 0·35 0·40 0·34 0·38 0·57 0·33 0·42 .. .. ..
February .. .. .. 0·91 0·84 0·87 0·43 0·33 0·39 0·38 0·30 0·36 0·43 0·36 0·39 0·71 0·62 0·68 .. .. ..
March .. .. .. 0·89 0·83 0·85 0·43 0·33 0·38 0·58 0·42 0·48 0·41 0·34 0·37 0·77 0·66 0·71 .. .. ..
April .. .. .. 0·94 0·83 0·84 0·48 0·38 0·42 0·89 0·46 0·66 0·44 0·39 0·43 0·93 0·72 0·78 .. .. ..
May .. .. 1·05 1·05 0·85 0·94 0·48 0·42 0·45 0·95 0·81 0·89 0·60 0·44 0·54 1·10 0·84 1·00 .. .. ..
June .. .. 0·96 1·02 0·86 0·93 0·47 0·41 0·45 0·93 0·74 0·83 0·55 0·45 0·50 1·22 1·07 1·15 .. .. ..
July .. .. 0·99 0·91 0·79 0·86 0·46 0·44 0·45 0·76 0·61 0·68 0·46 0·41 0·44 1·37 1·17 1·24 .. .. ..
August .. .. 0·96 0·85 0·56 0·64 0·46 0·43 0·45 0·64 0·46 0·57 0·45 0·38 0·42 1·22 1·00 1·14 .. .. ..
September 0·99 0·93 0·95 0·56 0·43 0·48 0·43 0·30 0·38 0·51 0·27 0·39 0·41 0·37 0·39 1·03 0·95 0·98 .. .. ..
October 0·98 0·91 0·95 0·43 0·33 0·38 0·30 0·17 0·24 0·51 0·33 0·45 0·40 0·32 0·35 1·17 0·99 1·07 .. .. ..
November 0·99 0·91 0·95 0·36 0·33 0·35 0·19 0·11 0·16 0·36 0·29 0·33 0·41 0·33 0·37 1·27 1·05 1·16 .. .. ..
December 0·99 0·98 0·95 0·38 0·33 0·35 0·38 0·15 0·26 0·43 0·34 0·40 0·43 0·28 0·36 1·24 1·12 1·16 .. .. ..
Mean. .. .. .. .. .. 0·70 .. .. 0·37 .. .. 0·53 .. .. 0·41 .. .. 0·96 .. .. ..
Months. 1898 1899 1900 1901
Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean.
January .. .. .. 0·95 0·89 0·90 0·44 0·34 0·39 0·41 0·28 0·35
February .. .. .. 0·91 0·84 0·87 0·43 0·33 0·39 0·38 0·30 0·36
March .. .. .. 0·89 0·83 0·85 0·43 0·33 0·38 0·58 0·42 0·48
April .. .. .. 0·94 0·83 0·84 0·48 0·38 0·42 0·89 0·46 0·66
May .. .. 1·05 1·05 0·85 0·94 0·48 0·42 0·45 0·95 0·81 0·89
June .. .. 0·96 1·02 0·86 0·93 0·47 0·41 0·45 0·93 0·74 0·83
July .. .. 0·99 0·91 0·79 0·86 0·46 0·44 0·45 0·76 0·61 0·68
August .. .. 0·96 0·85 0·56 0·64 0·46 0·43 0·45 0·64 0·46 0·57
September 0·99 0·93 0·95 0·56 0·43 0·48 0·43 0·30 0·38 0·51 0·27 0·39
October 0·98 0·91 0·95 0·43 0·33 0·38 0·30 0·17 0·24 0·51 0·33 0·45
November 0·99 0·91 0·95 0·36 0·33 0·35 0·19 0·11 0·16 0·36 0·29 0·33
December 0·99 0·98 0·95 0·38 0·33 0·35 0·38 0·15 0·26 0·43 0·34 0·40
Mean. .. .. .. .. .. 0·70 .. .. 0·37 .. .. 0·53
Months. 1902 1903 1904
Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean. Maxi- mum. Mini- mum. Mean.
January 0·40 0·34 0·38 0·57 0·33 0·42 .. .. ..
February 0·43 0·36 0·39 0·71 0·62 0·68 .. .. ..
March 0·41 0·34 0·37 0·77 0·66 0·71 .. .. ..
April 0·44 0·39 0·43 0·93 0·72 0·78 .. .. ..
May 0·60 0·44 0·54 1·10 0·84 1·00 .. .. ..
June 0·55 0·45 0·50 1·22 1·07 1·15 .. .. ..
July 0·46 0·41 0·44 1·37 1·17 1·24 .. .. ..
August 0·45 0·38 0·42 1·22 1·00 1·14 .. .. ..
September 0·41 0·37 0·39 1·03 0·95 0·98 .. .. ..
October 0·40 0·32 0·35 1·17 0·99 1·07 .. .. ..
November 0·41 0·33 0·37 1·27 1·05 1·16 .. .. ..
December 0·43 0·28 0·36 1·24 1·12 1·16 .. .. ..
Mean. .. .. 0·41 .. .. 0·96 .. .. ..
Table LIV.—Wadelai gauges.
Year. Date. Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
1901 1 .. .. .. .. .. .. .. .. .. .. .. 0·74
5 .. .. .. .. .. .. .. .. .. .. .. 0·66
10 .. .. .. .. .. .. .. .. .. .. 0·69 0·66
15 .. .. .. .. .. .. .. .. .. .. 0·69 0·64
20 .. .. .. .. .. .. .. .. .. .. 0·67 0·62
25 .. .. .. .. .. .. .. .. .. .. 0·75 0·58
30 .. .. .. .. .. .. .. .. .. .. 0·74 0·58
Mean .. .. .. .. .. .. .. .. .. .. 0·72 0·63
1902 1 0·58 0·30 0·25 0·13 0·10 0·15 0·10 0·20 0·29 0·33 0·71 0·86
5 0·55 0·32 0·28 0·09 0·13 0·15 0·11 0·19 0·43 0·41 0·71 0·89
10 0·53 0·27 0·25 0·09 0·14 .. 0·08 0·25 0·51 0·38 0·61 0·91
15 0·43 0·22 0·18 0·08 0·16 0·10 0·18 0·18 0·33 0·52 0·81 0·86
20 0·38 0·25 0·20 0·10 0·25 0·08 0·27 0·20 0·33 0·66 0·86 0·85
25 0·36 0·28 0·20 0·11 0·23 0·13 0·20 0·33 0·30 0·51 0·75 0·82
30 0·32 .. 0·13 0·10 0·18 0·10 0·19 0·28 0·33 0·65 0·86 0·76
Mean 0·44 0·26 0·20 0·09 0·17 0·12 0·15 0·24 0·37 0·49 0·76 0·85
1903 1 0·76 0·69 0·58 0·53 0·53 0·56 1·02 1·07 1·07 1·60 1·70 1·93
5 0·76 0·69 0·61 0·51 0·56 0·61 0·84 1·12 1·07 1·60 1·70 1·93
10 0·76 0·67 0·57 0·53 0·56 0·76 0·89 1·07 1·12 1·60 1·83 1·93
15 0·74 0·61 0·56 0·46 0·58 0·79 0·84 1·17 1·37 1·60 1·83 1·93
20 0·74 0·63 0·55 0·51 0·66 0·79 0·89 1·14 1·45 1·57 1·88 1·93
25 0·74 0·61 0·53 0·48 0·61 0·81 1·12 1·12 1·52 1·65 1·90 1·90
30 0·76 .. 0·53 0·53 0·61 1·00 1·07 1·07 1·60 1·68 1·93 1·90
Mean 0·75 0·64 0·56 0·50 0·59 0·77 0·95 1·12 1·32 1·63 1·84 1·92
1904 1 1·90 1·90 1·70 1·70 .. 1·74 .. .. .. .. .. ..
5 1·90 1·90 1·73 1·70 .. .. .. .. .. .. .. ..
10 1·90 1·87 1·69 1·70 .. .. .. .. .. .. .. ..
15 1·90 1·78 1·68 1·71 .. .. .. .. .. .. .. ..
20 1·90 1·73 1·68 1·71 .. .. .. .. .. .. .. ..
25 1·90 1·74 1·68 1·74 .. .. .. .. .. .. .. ..
30 1·90 .. 1·71 1·74 .. .. .. .. .. .. .. ..
Mean 1·90 1·80 1·69 1·71 .. .. .. .. .. .. .. ..
Table LV.—Gondokoro gauges.
1901
Date. Month. Date. May. June. July. Au- gust. Sep- tem- ber. Date. Month.
Jan. Oct.
1 ·22 1 0·34 0·44 0·33 0·34 0·63 1 0·41
5 ·20 2 0·34 0·42 0·33 0·34 0·63 5 0·39
10 ·18 3 0·38 0·43 0·32 0·35 0·64 10 0·51
15 ·17 4 0·40 0·43 0·33 0·34 0·63 15 0·60
20 ·12 5 0·71 0·45 0·33 0·43 0·63 20 0·71
25 ·12 6 0·56 0·43 0·60 0·54 0·69 25 0·67
30 ·12 7 0·52 0·41 0·47 0·44 0·63 30 0·69
Mean ·15 8 0·46 0·41 0·37 0·47 0·67 Mean 0·60
Feb. 9 0·42 0·41 0·59 0·64 0·67 Nov.
1 ·12 10 0·42 0·41 0·39 0·63 0·67 1 0·64
5 ·12 11 0·42 0·41 0·35 0·62 0·65 5 0·67
10 ·12 12 0·56 0·41 0·34 0·46 0·66 10 0·64
15 ·11 13 0·38 0·40 0·34 0·41 0·63 15 0·49
20 ·10 14 0·38 0·40 0·56 0·48 0·63 20 0·57
25 ·10 15 0·40 0·40 0·52 0·46 0·56 25 0·59
28 ·09 16 0·36 0·40 0·56 0·48 0·47 30 0·60
Mean ·11 17 0·34 0·40 0·61 1·09 0·43 Mean 0·61
March 18 0·36 0·40 0·43 1·09 0·41 Dec.
1 ·11 19 0·34 0·40 0·35 0·62 0·39 1 0·61
5 ·10 20 0·34 0·40 0·35 0·46 0·36 5 0·59
10 ·10 21 0·36 0·40 0·36 0·44 0·43 10 0·57
15 ·12 22 0·46 0·40 0·34 0·72 0·45 15 0·53
20 ·26 23 0·40 0·40 0·34 0·52 0·49 20 0·49
25 ·22 24 0·40 0·40 0·35 0·54 0·45 25 0·47
30 ·27 25 0·42 0·36 0·34 0·43 0·45 30 0·45
Mean ·18 26 0·52 0·42 0·36 1·24 0·43 Mean 0·52
April 27 0·42 0·54 0·35 0·67 0·41
1 0·08 28 0·46 0·40 0·35 0·66 0·39
5 0·08 29 0·46 0·34 0·35 0·62 0·41
10 0·14 30 0·46 0·34 0·35 .. 0·41
15 0·32 31 0·46 .. 0·35 .. ..
20 0·44 Mean 0·43 0·40 0·40 0·57 0·53
25 0·42
30 0·30
Mean 0·25
1902
Date. Month. Date. May. June. July. Au- gust. Sep- tem- ber. Date. Month.
Jan. Oct.
1 0·45 1 0·19 0·06 -0·01 0·44 0·54 1 0·48
5 0·43 2 0·20 0·08 0·02 0·36 0·52 5 0·26
10 0·43 3 0·22 0·14 0·02 0·44 0·74 10 0·54
15 0·47 4 0·26 0·11 0·04 0·54 1·04 15 0·79
20 0·45 5 0·24 0·09 0·71 0·49 0·94 20 0·80
25 0·41 6 0·19 0·09 0·34 0·42 0·90 25 0·76
30 0·41 7 0·19 -0·03 0·08 0·48 1·24 30 0·99
Mean 0·43 8 0·14 0·04 0·04 1·54 0·96 Mean 0·71
Feb. 9 0·16 0·09 0·04 1·09 0·84 Nov.
1 0·39 10 0·18 0·06 -0·01 1·52 1·04 1 1·07
5 0·36 11 0·34 0·03 -0·01 1·49 0·99 5 0·77
10 0·35 12 0·60 0·07 0·04 1·44 0·77 10 0·84
15 0·33 13 0·48 0·02 0·04 1·42 0·74 15 —
20 0·33 14 0·44 -0·01 0·24 1·46 0·84 20 1·23
25 0·36 15 0·51 -0·06 0·04 1·42 0·96 25 0·99
28 0·40 16 0·45 -0·03 0·02 1·42 1·28 30 0·96
Mean 0·35 17 0·39 -0·01 -0·01 1·44 0·94 Mean 1·00
March 18 0·53 -0·08 -0·01 1·38 0·94 Dec.
1 0·34 19 0·57 -0·06 0·09 1·32 0·84 1 0·94
5 0·36 20 0·64 -0·03 0·12 1·38 0·89 5 0·94
10 0·38 21 0·46 -0·06 0·40 1·46 0·82 10 0·92
15 0·46 22 0·39 -0·09 0·87 1·52 0·76 15 0·89
20 0·50 23 0·30 -0·14 0·48 1·62 0·62 20 0·85
25 0·34 24 0·27 +0·04 0·30 1·74 0·64 25 0·81
30 0·26 25 0·24 0·01 0·26 1·52 0·91 30 0·74
Mean 0·40 26 0·19 0·02 0·24 0·54 0·66 Mean 0·87
April 27 0·16 -0·06 0·22 0·94 0·62
1 0·14 28 0·14 -0·04 0·22 0·74 0·54
5 0·13 29 0·11 -0·01 0·46 0·70 0·54
10 0·04 30 0·07 -0·02 0·54 0·57
15 -0·01 31 0·04 .. 0·58 0·60 ..
20 0·19 Mean 0·30 0·01 0·19 1·09 0·82
25 0·05
30 0·13
Mean 0·07
1903
Date. Month. Date. May. June. July. Au- gust. Sep- tem- ber. Date. Month.
Jan. Oct.
1 0·74 1 0·72 1·15 1·37 1·55 1·86 1 2·18
5 0·71 2 1·70 1·06 1·38 1·57 1·82 5 2·11
10 0·66 3 0·68 1·06 1·46 1·65 1·90 10 2·12
15 0·63 4 0·68 1·06 1·43 1·65 2·54 15 2·45
20 0·63 5 0·70 1·00 1·39 1·72 2·24 20 2·06
25 0·61 6 0·98 1·10 1·44 1·61 2·23 25 2·20
30 0·63 7 0·92 1·61 1·46 1·73 2·71 30 2·20
Mean 0·65 8 0·85 1·36 1·51 2·16 2·50 Mean 2·16
Feb. 9 0·89 1·35 1·49 2·08 2·33 Nov.
1 0·62 10 1·06 1·10 1·46 2·03 2·29 1 2·20
5 0·61 11 0·80 1·07 1·41 2·50 2·24 5 2·13
10 0·63 12 1·42 1·06 1·45 2·03 2·16 10 2·05
15 0·58 13 1·48 1·09 1·56 2·07 2·09 15 1·92
20 0·59 14 0·85 1·08 1·49 1·86 2·07 20 1·91
25 0·56 15 0·85 1·06 1·35 2·12 2·20 25 1·90
28 0·53 16 0·89 1·55 1·40 1·99 2·23 30 1·77
Mean 0·59 17 0·86 1·47 1·35 1·90 2·37 Mean 1·96
March 18 0·85 1·44 1·40 1·93 2·48 Dec.
1 0·51 19 0·85 1·40 1·40 1·86 2·57 1 1·77
5 0·51 20 0·86 1·44 1·40 1·85 2·70 5 0·89
10 0·51 21 0·86 1·40 1·41 1·90 2·76 10 0·86
15 0·51 22 1·35 1·52 1·52 1·95 2·76 15 0·81
20 0·52 23 1·52 1·40 1·61 1·86 2·96 20 0·79
25 0·51 24 1·02 1·40 1·52 1·82 2·96 25 0·79
30 0·50 25 1·00 1·37 1·55 1·83 2·58 30 0·76
Mean 0·51 26 0·97 1·27 1·56 2·20 2·45 Mean 0·88
April. 27 1·03 1·30 1·67 2·16 2·33
1 0·50 28 1·00 1·32 1·61 2·07 2·23
5 0·48 29 0·90 1·43 1·65 1·82 2·20
10 0·48 30 0·89 1·35 1·63 1·88 2·18
15 0·55 31 0·91 .. 1·52 1·90 ..
20 0·57 Mean 0·95 1·27 1·48 1·91 2·36
25 0·57
30 0·64
Mean 0·53
1904
Date. Month. Date. May. June.
Jan.
1 0·79 1 0·68 0·90
5 0·78 2 0·68 0·90
10 0·78 3 0·70 0·90
15 0·76 4 0·70 0·90
20 0·84 5 0·70 0·90
25 0·84 6 0·70 0·88
30 0·82 7 0·68 0·84
Mean. 0·80 8 0·68 0·80
Feb. 9 0·68 0·76
1 0·82 10 0·68 0·76
5 0·80 11 0·78 0·74
10 0·74 12 0·78 0·72
15 0·72 13 0·84 0·74
20 0·70 14 0·84 0·72
25 0·68 15 0·80 0·72
28 0·74 16 0·80 0·70
Mean. 0·73 17 0·76 0·70
March 18 0·78 0·70
1 0·68 19 0·80 0·74
5 0·70 20 0·80 0·82
10 0·66 21 0·84 0·70
15 0·66 22 0·88 0·70
20 0·66 23 0·88 0·74
25 0·84 24 0·88 0·78
30 0·90 25 1·00 0·74
Mean. 0·71 26 0·88 0·88
April. 27 0·84 0·78
1 0·74 28 0·84 0·84
5 0·72 29 0·84 0·82
10 0·72 30 0·90 0·88
15 0·80 31 .. ..
20 0·84 Mean. 0·79 0·79
25 0·74
30 ..
Mean. 0·77
Table LVI.—Mongalla gauges.
1903
Date. Month. Date. May. June. July. Au- gust. Sep- tem- ber. Date. Month.
January. October.
1 1 1·65 1·93 2·19 2·52 1 2·83
5 2 1·47 1·89 2·50 2·45 5 2·83
10 3 1·47 1·79 2·34 2·58 10 2·81
15 4 1·51 1·86 2·30 2·73 15 2·91
20 5 1·75 1·91 2·28 2·85 20 2·80
25 6 1·96 1·86 2·21 2·90 25 2·80
30 7 1·75 1·82 2·14 3·02 30 2·87
Mean. 8 1·91 1·75 2·12 3·16 Mean. 2·83
February. 9 1·89 1·84 2·59 3·14 Nov.
1 10 1·89 1·84 2·63 3·08 1 2·84
5 11 1·58 1·82 2·73 2·90 5 2·81
10 12 1·58 1·75 2·73 2·84 10 2·81
15 13 1·61 1·75 2·68 2·82 15 2·79
20 14 1·61 1·93 2·66 2·82 20 2·66
25 15 1·98 1·86 2·63 2·82 25 2·35
28 16 1·98 1·86 2·52 2·84 30 2·27
Mean. 17 2·10 1·89 2·56 2·92 Mean. 2·64
March. 18 2·10 1·82 2·56 3·06 Dec.
1 19 2·10 1·96 2·63 3·12 1 2·26
5 20 1·82 1·93 2·63 3·18 5 2·21
10 21 1·95 2·00 2·59 3·30 10 2·17
15 22 1·89 2·00 2·65 3·40 15 2·14
20 23 1·86 2·05 2·66 3·52 20 2·10
25 24 1·82 2·05 2·63 3·54 25 2·03
30 25 1·75 2·07 2·61 3·42 30 2·02
Mean. 26 1·72 2·07 2·49 3·32 Mean. 2·13
April.
1 0·83 27 1·75 2·12 2·52 3·18
5 0·87 28 1·68 2·13 2·52 3·05
10 0·90 29 1·89 2·16 .. 3·00
15 0·89 30 1·93 2·21 .. 2·92
20 0·96 31 .. 2·21
25 1·14 Mean. 1·82 1·96 2·49 2·97
30 0·99
Mean. 0·92
1904
Date. Month. Date. May. June. July. Au- gust. Sep- tem- ber. Date. Month.
January. October.
1 2·03 1 1·91 2·17
5 2·00 2 1·89 2·24
10 1·98 3 1·89 2·17
15 1·97 4 1·89 2·21
20 1·96 5 1·89 2·17
25 1·92 6 1·96 2·17
30 1·91 7 1·89 2·14
Mean. 1·97 8 1·89 2·10
February. 9 1·89 2·07
1 1·91 10 1·89 2·03
5 1·89 11 1·96 2·00
10 1·86 12 2·03 2·00
15 1·82 13 2·10 2·00
20 1·82 14 2·03 2·00
25 1·82 15 2·07 2·00
28 1·82 16 2·03 1·96
Mean. 1·85 17 2·03 1·96
March. 18 2·03 1·96
1 1·82 19 2·03 2·10
5 1·81 20 2·07 2·03
10 1·79 21 2·07 2·00
15 1·82 22 2·17 1·98
20 1·77 23 2·17 1·98
25 1·79 24 2·17 2·00
30 1·96 25 2·21 2·07
Mean. 1·82 26 2·21 2·07
April.
1 1·93 27 2·17 2·10
5 1·82 28 2·14 2·10
10 1·82 29 2·12 2·07
15 1·93 30 2·10 2·03
20 2·07 31 2·21
25 1·96 Mean. 2·03 2·07
30 1·89
Mean. 1·91
Table LVII.—Sobat River gauges at Nasser.
Year. Date. Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
1903 1 .. .. .. .. .. .. .. .. .. .. 6·30 ..
5 .. .. .. .. .. .. .. .. .. .. 6·30 ..
10 .. .. .. .. .. .. .. .. .. .. 6·28 ..
15 .. .. .. .. .. .. .. .. .. .. 6·24 ..
20 .. .. .. .. .. .. .. .. .. .. 6·18 ..
25 .. .. .. .. .. .. .. .. .. 6·46 6·14 ..
30 .. .. .. .. .. .. .. .. .. 6·29 .. ..
Mean .. .. .. .. .. .. .. .. .. .. 6·23 ..
1904 1 5·11 2·02 1·26 2·00 1·96 4·59 .. .. .. .. .. ..
5 4·99 1·92 1·34 2·00 2·26 4·68 .. .. .. .. .. ..
10 4·49 1·82 1·40 1·82 2·88 4·82 .. .. .. .. .. ..
15 3·88 1·60 1·86 1·90 3·42 5·02 .. .. .. .. .. ..
20 2·92 1·50 2·14 2·38 4·10 .. .. .. .. .. .. ..
25 2·24 1·36 1·88 2·38 .. .. .. .. .. .. .. ..
30 2·10 .. 2·00 2·00 .. .. .. .. .. .. .. ..
Mean 3·43 1·64 1·71 2·07 .. .. .. .. .. .. .. ..
Table LVIII.—Sobat River gauges at Dulaib Hilla.
Year. Date. Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
1903 1 .. .. .. .. 0·00 1·11 1·71 2·30 2·80 3·26 3·48 3·52
5 .. .. .. .. 0·09 1·22 1·80 2·39 2·86 3·27 3·48 3·52
10 .. .. .. .. 0·28 1·36 1·87 2·45 2·93 3·36 3·49 3·53
15 .. .. .. .. 0·40 1·53 1·95 2·52 3·05 3·42 3·49 3·54
20 .. .. .. .. 0·62 1·56 2·08 2·57 3·11 3·44 3·50 3·53
25 .. .. .. .. 0·81 1·65 2·18 2·70 3·16 3·45 3·50 3·51
30 .. .. .. .. 1·00 1·70 2·28 2·74 3·26 3·47 3·51 3·45
Mean .. .. .. .. 0·47 1·46 1·99 2·54 3·03 3·40 3·49 3·51
1904 1 3·42 1·92 0·93 0·88 0·81 1·56 2·00 .. .. .. .. ..
5 3·36 1·65 0·87 0·88 0·73 1·65 .. .. .. .. .. ..
10 3·19 1·42 0·88 0·86 0·86 1·67 .. .. .. .. .. ..
15 3·04 1·24 0·91 0·78 0·99 1·72 .. .. .. .. .. ..
20 2·74 1·12 0·97 0·81 1·21 1·83 .. .. .. .. .. ..
25 2·36 1·00 1·00 0·90 1·39 1·90 .. .. .. .. .. ..
30 2·01 .. 0·91 0·84 1·49 1·98 .. .. .. .. .. ..
Mean 2·77 1·30 0·92 0·85 1·08 1·76 .. .. .. .. .. ..
Table LIX.— White Nile gauges at Tewfikieh.
Year. Date. Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
1903 1 .. .. .. .. 0·24 1·19 1·71 2·11 2·76 3·47 3·53 3·56
5 .. .. .. .. 0·24 1·30 1·78 2·15 2·86 3·55 3·54 3·58
10 .. .. .. .. 0·34 1·42 1·88 .. 3·07 3·39 3·54 3·58
15 .. .. .. .. 0·53 1·51 1·89 .. 3·20 3·41 3·55 3·59
20 .. .. .. 0·22 0·74 1·58 2·01 .. 3·26 3·46 3·56 3·59
25 .. .. .. 0·24 .. 1·61 2·09 .. 3·37 3·50 3·55 3·58
30 .. .. .. 0·24 .. 1·69 2·16 .. 3·46 3·52 3·56 3·57
Mean .. .. .. .. .. 1·48 1·94 .. 3·15 3·44 3·55 3·58
1904 1 3·57 2·07 0·97 0·91 0·84 1·56 .. .. .. .. .. ..
5 3·54 1·76 0·91 0·91 0·74 1·67 .. .. .. .. .. ..
10 3·48 1·48 0·92 0·89 0·86 1·69 .. .. .. .. .. ..
15 3·36 1·25 0·94 0·81 1·02 1·74 .. 2·79 .. .. .. ..
20 3·10 1·09 1·00 0·84 1·25 1·87 .. 2·87 .. .. .. ..
25 2·69 1·07 1·03 0·93 1·43 1·94 .. 2·92 .. .. .. ..
30 2·23 .. 0·97 0·84 1·53 2·02 .. 2·98 .. .. .. ..
Mean 3·16 1·37 0·96 0·88 1·11 1·79 .. .. .. .. .. ..
Table LX.—Duem gauges.
Year. Date. Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.
1901 1 .. 0·91 0·66 0·43 0·61 0·59 1·43 2·88 4·10 3·40 2·40 2·12
5 .. 0·90 0·66 0·40 0·64 0·66 1·44 3·18 4·28 3·36 2·35 2·10
10 .. 0·88 0·60 0·46 0·62 0·77 1·54 3·38 4·16 2·90 2·33 2·00
15 .. 0·85 0·51 0·27 0·51 0·91 1·78 3·80 4·22 2·70 2·28 1·86
20 .. 0·80 0·47 0·36 0·52 1·08 1·96 4·12 4·08 2·85 2·30 1·80
25 .. 0·75 0·45 0·46 0·52 1·22 1·98 4·12 3·70 2·38 2·30 1·64
30 .. 0·68 0·45 0·58 0·51 1·32 2·48 4·04 3·46 2·42 2·14 1·46
Mean .. 0·82 0·54 0·42 0·56 0·94 1·80 3·65 4·00 2·84 2·30 1·85
1902 1 1·38 0·78 0·60 0·59 0·56 0·77 1·28 2·12 3·52 3·50 2·36 ..
5 1·24 0·74 0·58 0·62 0·52 0·81 1·40 2·20 3·49 3·48 2·26 ..
10 1·16 0·73 0·51 0·58 0·49 0·95 1·48 2·55 3·62 3·36 2·20 ..
15 1·07 0·66 0·54 0·58 0·54 1·04 1·60 2·82 3·72 3·00 2·14 2·02
20 0·95 0·60 0·60 0·55 0·59 1·08 1·72 2·91 3·72 2·68 2·11 1·99
25 0·90 0·60 0·66 0·61 0·66 1·14 1·89 3·17 3·58 2·57 2·00 2·01
30 0·80 0·60 0·62 0·57 0·74 1·24 2·10 3·52 3·51 2·45 2·00 1·98
Mean 1·07 0·67 0·59 0·58 0·58 1·00 1·64 2·75 3·60 3·00 2·15 ..
1903 1 1·90 1·04 0·72 0·41 0·38 0·74 1·31 1·27 4·33 4·18 3·13 2·34
5 1·90 1·02 0·71 0·40 0·34 0·82 1·34 2·62 4·30 4·01 3·02 2·16
10 1·75 0·99 0·64 0·42 0·33 0·98 1·54 3·18 4·48 3·82 2·82 1·96
15 1·45 0·89 0·55 0·41 0·36 1·07 1·74 3·70 4·38 3·62 2·66 1·92
20 1·39 0·88 0·48 0·38 0·41 1·20 1·80 3·84 4·18 3·36 2·56 1·84
25 1·20 0·80 0·47 0·37 0·52 1·28 2·03 4·12 4·28 3·40 2·42 1·76
30 1·06 0·77 0·42 0·37 0·61 1·33 2·24 4·22 4·22 3·41 2·36 1·70
Mean 1·52 0·90 0·57 0·40 0·42 1·06 1·70 3·42 4·30 3·70 2·70 1·95
1904 1 1·70 1·38 0·88 0·26 0·19 0·24 0·50 2·00 2·64 .. .. ..
5 1·66 1·32 0·66 0·30 0·18 0·30 0·51 2·90 2·80 .. .. ..
10 1·62 1·28 0·50 0·28 0·16 0·40 0·70 3·40 3·00 .. .. ..
15 1·60 1·20 0·35 0·25 0·15 0·41 0·95 3·15 .. .. .. ..
20 1·54 1·14 0·30 0·22 0·14 0·48 1·30 2·70 .. .. .. ..
25 1·46 1·00 0·28 0·21 0·22 0·49 1·55 2·45 .. .. .. ..
30 1·40 0·94 0·26 0·19 0·24 0·50 1·90 2·64 .. .. .. ..
Mean 1·57 1·18 0·46 0·24 0·18 0·40 1·06 2·75 .. .. .. ..
Table LXI.—Wad Medani gauges.
1901
Date. Month. Date. May. June. July. Au- gust. Sept. Date. Month.
January .. .. .. .. .. .. October.
.. .. .. .. .. .. 1 ..
.. .. .. .. .. .. 5 ..
.. .. .. .. .. .. 10 ..
.. .. .. .. .. .. 15 ..
.. .. .. .. .. .. 20 ..
.. .. .. .. .. .. 25 ..
.. .. .. .. .. .. 30 ..
.. .. .. .. .. .. Mean. ..
February .. .. .. .. .. .. Novemb.
.. .. .. .. .. .. 1 4·49
.. .. .. .. .. .. 5 4·19
.. .. .. .. .. .. 10 3·85
.. .. .. .. .. .. 15 3·53
.. .. .. .. .. .. 20 3·25
.. .. .. .. .. .. 25 3·07
.. .. .. .. .. .. 30 3·01
.. .. .. .. .. .. Mean. 3·58
March .. .. .. .. .. .. Decemb.
.. .. .. .. .. .. 1 2·89
.. .. .. .. .. .. 5 2·67
.. .. .. .. .. .. 10 2·47
.. .. .. .. .. .. 15 2·33
.. .. .. .. .. .. 20 2·19
.. .. .. .. .. .. 25 2·05
.. .. .. .. .. .. 30 1·91
.. .. .. .. .. .. Mean. 2·33
April .. .. .. .. .. ..
1902
Date. Month. Date. May. June. July. Au- gust. Sept. Date. Month.
January. October.
1 1·89 1 0·39 1·59 3·80 7·56 9·62 1 9·94
5 1·81 2 0·33 2·11 3·80 7·86 10·12 5 9·30
10 1·69 3 0·33 2·11 3·70 7·94 10·42 10 8·00
15 1·61 4 0·37 2·07 3·80 8·32 10·32 15 7·38
20 1·55 5 0·39 2·03 4·16 8·42 10·30 20 7·08
25 1·49 6 0·41 1·97 4·46 8·56 10·10 25 6·68
30 1·39 7 0·39 1·91 4·68 8·76 10·40 30 6·14
Mean. 1·62 8 0·39 1·97 4·64 8·86 10·50 Mean. 7·65
February. 9 0·37 2·25 4·56 9·00 10·40 Nov.
1 1·37 10 0·35 2·15 4·38 9·10 10·40 1 5·90
5 1·31 11 0·41 2·00 4·48 9·14 10·28 5 5·66
10 1·21 12 0·48 1·77 4·28 9·16 10·60 10 5·24
15 1·13 13 0·51 1·67 4·56 9·14 10·70 15 4·94
20 1·07 14 0·61 1·61 4·70 9·02 10·48 20 4·74
25 1·03 15 0·77 1·65 4·86 8·96 10·28 25 4·60
28 0·99 16 0·89 1·99 4·80 8·66 10·32 30 4·28
Mean. 1·15 17 0·87 2·57 5·10 8·66 10·32 Mean. 5·02
March. 18 1·01 2·97 5·20 8·96 10·00 Dec.
1 0·98 19 0·95 3·27 5·40 9·48 10·30 1 —
5 0·91 20 0·93 3·39 5·48 10·08 10·26 5 4·00
10 0·79 21 0·71 3·39 5·42 10·00 10·00 10 3·73
15 0·87 22 0·61 3·19 5·66 9·66 9·80 15 3·54
20 1·01 23 0·65 3·04 5·70 9·46 9·80 20 3·40
25 0·84 24 0·61 2·94 5·66 9·52 10·00 25 3·18
30 0·67 25 0·57 3·04 5·76 9·92 10·10 30 2·94
Mean. 0·87 26 0·61 3·89 5·74 10·26 9·90 Mean. 3·51
April.
1 0·63 27 0·65 4·29 5·72 10·46 9·95
5 0·55 28 0·71 4·24 6·36 10·52 10·00
10 0·43 29 0·91 4·24 6·79 10·32 10·26
15 0·43 30 0·11 4·28 7·06 10·02 10·26
20 0·51 31 0·21 7·28 9·72
25 0·57 Mean. 0·56 2·65 5·09 9·21 10·20
30 0·41
Mean. 0·50
1903
Date. Month. Date. May. June. July. Au- gust. Sept. Date. Month.
January. October.
1 2·88 1 0·96 3·15 4·71 7·75 11·02 1 9·48
5 2·70 2 0·96 3·25 5·27 9·11 10·68 5 8·84
10 2·56 3 0·94 3·85 5·61 9·81 10·44 10 8·42
15 2·46 4 0·92 4·05 5·81 10·11 10·40 15 7·94
20 2·36 5 0·90 3·61 5·85 10·11 10·50 20 8·84
25 2·26 6 0·88 3·65 6·10 10·07 10·64 25 8·25
30 2·16 7 0·88 3·49 6·23 10·21 10·56 30 7·33
Mean. 2·42 8 0·90 3·41 6·45 10·15 10·50 Mean. 8·41
February. 9 0·86 3·63 6·55 9·99 10·74 Nov.
1 2·12 10 0·82 3·79 6·57 9·89 10·52 1 7·19
5 2·04 11 0·84 3·90 6·81 10·19 10·46 5 6·68
10 2·00 12 0·86 4·20 7·03 10·59 10·40 10 6·12
15 1·90 13 0·88 4·30 7·13 10·71 10·06 15 5·70
20 1·84 14 0·92 4·42 6·77 10·57 9·96 20 5·55
25 1·72 15 0·98 4·64 6·74 10·32 9·92 25 5·14
28 1·70 16 1·02 4·82 6·57 10·49 9·94 30 4·96
Mean. 1·91 17 1·06 4·70 6·91 10·41 9·92 Mean. 5·83
March. 18 1·14 4·62 7·05 10·49 9·96 Dec.
1 1·68 19 1·26 4·52 7·05 10·49 10·12 1 4·92
5 1·60 20 1·40 4·32 7·39 10·73 10·32 5 4·80
10 1·52 21 1·66 4·30 8·01 10·71 10·42 10 4·54
15 1·44 22 1·76 4·28 7·97 10·71 10·56 15 4·40
20 1·34 23 1·92 4·28 7·81 10·47 10·52 20 4·10
25 1·32 24 2·06 4·25 7·87 10·39 10·46 25 3·84
30 1·30 25 2·20 4·51 7·75 10·39 10·32 30 3·60
Mean. 1·44 26 2·74 4·31 7·77 10·47 10·18 Mean. 4·28
April. 27 1·51 4·21 7·80 10·41 9·72
1 1·24 28 3·43 4·17 7·73 10·61 9·42
5 1·10 29 3·39 4·13 7·77 10·67 9·24
10 1·10 30 3·34 4·41 7·67 10·80 9·22
15 1·08 31 3·25 7·70 10·92
20 1·04 Mean. 1·50 4·10 6·92 10·28 10·23
25 0·98
30 0·98
Mean. 1·06
1904
Date. Month. Date. May. June. July. Au- gust. Sept.
January.
1 3·64 1 1·50 2·36 4·24 9·60 9·50
5 3·56 2 1·48 2·50 4·58 10·30 9·58
10 3·48 3 1·66 2·88 4·82 10·10 9·50
15 3·36 4 1·66 3·32 5·22 9·90 9·50
20 3·15 5 1·64 3·40 5·52 9·70 9·40
25 3·08 6 1·64 3·28 5·52 9·60 9·30