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BEFORE THE FLOOD
AFTER THE FLOOD
Management and MaintenancePerennial Problems
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acre-feet acres agricultural land Arid Land Aswan Aswan Dam Aswan High Dam Bank Barton Worthington benefits Biswas Brazil Bruce Stokes building built canal Carl Widstrand caused Chagga construction cost crops cultivation cultural damage deforestation Developing Countries disease drainage earthquakes ecological economic Edward Goldsmith effects Egypt Environment Environmental estimated evaporation farmers farming feddans fertile fish flood control forest Goodland groundwater hectares High Dam hydroelectric Ibid increase India industrial inevitable irrigated land irrigation irrigation agriculture irrigation schemes irrigation system John Waterbury Lake large dams large-scale water loss malaria McGuire Gibson ment meters million hectares Nile peasants percent perennial irrigation plans plants points pollution problem production qanats region reservoir resettlement result salinization salt schistosomiasis sedimentation seepage seismic silt social soil Sonjo Sri Lanka supply tanks Third World tion traditional irrigation Valley village water development schemes water projects waterlogging wildlife World Bank Worldwatch Institute