The Social and Environmental Effects of Large Dams, Volume 2 |
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Page 134
... salt . Even a fresh mountain stream will contain up to 50 parts per million ( ppm ) of salt - admittedly a minute amount compared with the 35,000 ppm found in sea water , but significant nonetheless . ' When the concentration of salts ...
... salt . Even a fresh mountain stream will contain up to 50 parts per million ( ppm ) of salt - admittedly a minute amount compared with the 35,000 ppm found in sea water , but significant nonetheless . ' When the concentration of salts ...
Page 136
... salt must not be added to the soil - for example , by using irrigation water with a high salt content - unless an equal amount of salt can be flushed out of the land . Irrigation schemes throw that delicate water - salt balance dan ...
... salt must not be added to the soil - for example , by using irrigation water with a high salt content - unless an equal amount of salt can be flushed out of the land . Irrigation schemes throw that delicate water - salt balance dan ...
Page 153
... salt balance . Today , with river flow being regulated by storage sys- tems , and with high consumptive use of the released water , there is not enough waste flow left to achieve salt balance . The salt is being stored , in one way or ...
... salt balance . Today , with river flow being regulated by storage sys- tems , and with high consumptive use of the released water , there is not enough waste flow left to achieve salt balance . The salt is being stored , in one way or ...
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