The physiography of the river Nile and is basin . 3 71 3-24 228 0-1)83 224 So that the total discharges were Low stagem- (•.;)3 ).04 ;).;). 02 J.! Fliimi stape 10702071 that of 1!)04 being measured ;it a ditfercnt point to the others. Com-paring the volumes discharged, 1903 a year of heavy rainfall, showsthe highest value but that of Angu,st 1904 nnist have been larger asthe gauge readings were higher on account of the much higher levelof lake Albert in this year and consequently the increased dischargefrom the lake as the Wadelai gauge records. Scouring
The physiography of the river Nile and is basin . 3 71 3-24 228 0-1)83 224 So that the total discharges were Low stagem- (•.;)3 ).04 ;).;). 02 J.! Fliimi stape 10702071 that of 1!)04 being measured ;it a ditfercnt point to the others. Com-paring the volumes discharged, 1903 a year of heavy rainfall, showsthe highest value but that of Angu,st 1904 nnist have been larger asthe gauge readings were higher on account of the much higher levelof lake Albert in this year and consequently the increased dischargefrom the lake as the Wadelai gauge records. Scouring of the bed in 1908 to the extent of one metre at the pointwhere the measurements Mere made near Lado has been assumed though it is not clear on what ground, for while the mean depthincreased from 4Mi2 to .^?()0 metres the gauge reading increased from085 to 203 metres, an even greater amount, and the flooding of the islandopposite the Belgian station of Lado fully bears out the exceptional Willcocks. The Nile in 1U04. London, , p. 23. ^. c o — 115 — height of the river. It is probable that deposition of sand andgravel would be greatest at the end of Septeinljer and in Octoberwhen the river commences to fall and waters coming from the reachesupstream wlicic the grade is high would lose nmch of their load inthe first reach of low grade especially on a falling stage. In April1903 the Lado-(i<)ndokor() reach was much more difficult for navigationthan in 1901 although the water level as recorded on the ffaujre atGondokoro was higher. On the basis of the discharges which have been measured near Gon-dokoro a proxisional discharge table was worked out but it cannotbe regarded as reliable. It is based upon three discharges measuredat low stage about the beginning of April in 1901, 1903 and 1904 andon two others measured at flood .stage—1902 and 1903, but these dataare too few to control the values corresponding to intermediate readingsof the gauge between the lowest and
Size: 2296px × 1088px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectwatersupply, bookyear
