The social and environmental effects of large dams, Volume 2A study of large-scale dams |
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Page 11
He also estimated that the area under irrigation was then increasing at an annual
rate of 2.9 percent. By contrast, the amount of nonirrigated land coming into
production was increasing at only 0.7 percent a year.24 Writing in 1976, Dr.
Roger ...
He also estimated that the area under irrigation was then increasing at an annual
rate of 2.9 percent. By contrast, the amount of nonirrigated land coming into
production was increasing at only 0.7 percent a year.24 Writing in 1976, Dr.
Roger ...
Page 140
2" Waterlogging alone is estimated to have reduced agricultural productivity by at
least 30 percent, although it is claimed, perhaps optimistically, that drainage will
restore productivity. More than 50 percent of the 3.6 million hectares under ...
2" Waterlogging alone is estimated to have reduced agricultural productivity by at
least 30 percent, although it is claimed, perhaps optimistically, that drainage will
restore productivity. More than 50 percent of the 3.6 million hectares under ...
Page 272
The Bureau of Reclamation estimated net irrigation benefits for the dam at
$3,610,000 annually, with costs at $1,987,000. When Parry and Norgaard
analyzed the figures, however, they pointed out: The Bureau of Reclamation
predicted ...
The Bureau of Reclamation estimated net irrigation benefits for the dam at
$3,610,000 annually, with costs at $1,987,000. When Parry and Norgaard
analyzed the figures, however, they pointed out: The Bureau of Reclamation
predicted ...
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Contents
BEFORE THE FLOOD | 17 |
AFTER THE FLOOD | 51 |
Management and MaintenancePerennial Problems | 163 |
Copyright | |
5 other sections not shown
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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