The Nile in 1904

by Sir William Willcocks

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	„

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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