The Social and Environmental Effects of Large Dams, Volume 2 |
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Page 65
... seepage from irrigation canals is also a major contributor to the problem . The extent of seepage varies considerably ac- cording to climate , soil , and the length and type of distribution system . Almost always , however , the extent ...
... seepage from irrigation canals is also a major contributor to the problem . The extent of seepage varies considerably ac- cording to climate , soil , and the length and type of distribution system . Almost always , however , the extent ...
Page 66
... seepage , and extravagance in water utilization equal 17 percent of the water delivered . -In many areas of the Middle East , between 10 and 70 per- cent of the total volume of water conveyed through irrigation ca- nals is lost to seepage ...
... seepage , and extravagance in water utilization equal 17 percent of the water delivered . -In many areas of the Middle East , between 10 and 70 per- cent of the total volume of water conveyed through irrigation ca- nals is lost to seepage ...
Page 247
... seepage losses at Aswan would be far greater than predicted and would in effect cancel out any gains from storing such a large volume of water . He calculated that high winds at the reservoir site could increase annual evaporation ...
... seepage losses at Aswan would be far greater than predicted and would in effect cancel out any gains from storing such a large volume of water . He calculated that high winds at the reservoir site could increase annual evaporation ...
Contents
INTRODUCTION | 1 |
The Problems of Resettlement | 17 |
Management and MaintenancePerennial Problems | 163 |
Copyright | |
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acre-feet acres agricultural land Akawaio Arid Land Aswan Aswan Dam Aswan High Dam Barton Worthington benefits billion m³ 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 large dams large-scale water loss malaria ment meters million hectares Nile peasants percent perennial irrigation plans plants points pollution problem production qanats region reservoir resettlement result Rothé salinization salt schistosomiasis sedimentation seepage seismic silt social soil Sonjo Sri Lanka supply tanks Third World tion traditional irrigation Tucuruí Valley village water development schemes water projects waterlogging wildlife World Bank