The Social and Environmental Effects of Large Dams, Volume 2 |
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Page 125
... soil together . In addition , the soil , deprived of the forest litter , rapidly loses its structure and becomes very vulnerable to erosion by wind and water . A study quoted by Alan Grainger , of the School of Forestry at Oxford ...
... soil together . In addition , the soil , deprived of the forest litter , rapidly loses its structure and becomes very vulnerable to erosion by wind and water . A study quoted by Alan Grainger , of the School of Forestry at Oxford ...
Page 134
... soil reaches a range of 0.5 to 1.0 percent , the land becomes toxic to plant life . In the dry tropics that problem is particularly acute , since there is not enough rainfall to flush out the salts that accumulate in the soil . Soils in ...
... soil reaches a range of 0.5 to 1.0 percent , the land becomes toxic to plant life . In the dry tropics that problem is particularly acute , since there is not enough rainfall to flush out the salts that accumulate in the soil . Soils in ...
Page 187
... soil's capacity to retain water is lessened and there is more susceptibility to drought . Without reserves of moisture , the soil dries out and the harmattan , or desert wind , can blow it away . This is much less of a problem when ...
... soil's capacity to retain water is lessened and there is more susceptibility to drought . Without reserves of moisture , the soil dries out and the harmattan , or desert wind , can blow it away . This is much less of a problem when ...
Contents
BEFORE THE FLOOD | 17 |
AFTER THE FLOOD | 51 |
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