Natural Drainage of River Valleys

by Hammad Y. Hammad,

Serial Information: Journal of the Irrigation and Drainage Division, 1965, Vol. 91, Issue 2, Pg. 39-50

Document Type: Journal Paper

Abstract: The problem of seepage flow from a river into its valley deposits and visa versa is examined. The valley aquifer is formed of a sand bed topped by a clay cap. If lift irrigation is applied to the valley land, the river water being lower, the river itself may behave as a natural drain to which the excess of irrigation water seeps through the permeable valley deposits. The propagation of a pressure wave in the valley aquifer resulting from a flood wave in the river is studied and water-table fluctuations are determined with the object of fulfilling both drainage requirements, namely, drawdown and leaching. The proposed treatment is applied to the case of the Nile Valley (Egypt) in the pre - and post-High-Dam conditions. The adequacy of the natural drainage process is examined.

Subject Headings: Drainage | Rivers and streams | High-rise buildings | Wave pressure | Aquifers | Wave propagation | River flow | Seepage | Africa | Egypt

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