Impact of use of drainage on water delivery performance in irrigation networks at the lower Nile Delta
The main problem facing the Nile Delta water supply is shortages at the ends of irrigation networks as well as at the ends of main canals.This problem has become accentuated as water demands have increased over time.The Ministry of Irrigation and Water Resources of Egypt is currently trying to avoid water supply shortages by feeding irrigation canals through an agricultural drainage system.However,there is an oversupply in some months and shortages in others.Therefore,we calculated performance indicators(adequacy,efficiency,dependability and equity)for an area in the Kafr El-Sheikh Governorate under two water supply conditions:(1)water supply from head regulators only(WSHR)and(2)water supply from head regulators supplemented by backflow from agricultural drainage canals(WSHRB).During the summer(May–September)of 2008,WSHR was sufficient during May and September for all branch canals.It was insufficient during June,July and August,and supplemental agricultural drainage backflow was required.During the following winter(October–April),WSHR was sufficient during all months in all branch canals,so there was no need for agricultural drainage backflow during these months.The amount of drainage backflow was more than sufficient to supplement the freshwater shortage during June,July and August.If the quality is sufficiently high,drainage backflow may have the potential to conserve freshwater flowing from canal head regulators or to increase the area under cultivation.
Khater A.El-Hamed Y.Kitamura K.Shimizu Waleed H.Abou El Hassan
The United Graduate School of Agric. Sciences,Tottori University,Tottori 680-8553,Japan Faculty of Agriculture,Tottori University,Tottori 680-8553,Japan Faculty of Agriculture, Tottori University, Tottori 680-8553, National Water Research Center,WMRI,Delta Barrage NWRC Building,13621/5,Egypt
国际会议
The 11th International Conference on Development of Drylands(第十一届国际干旱区大会)
北京
英文
326-333
2013-03-18（万方平台首次上网日期，不代表论文的发表时间）