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AQUASTAT
AQUASTAT
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waterlogging & salinity

© FAO"Waterlogging" is defined as the state of land in which the subsoil water table is located at or near the surface with the result that the yield of crops commonly grown on it is reduced well bellow for the land, or, if the land is not cultivated, it cannot be put to its normal use because of the high subsoil water table.

"Salinity control" is defined as the physical control, management, and use of water and related land resources in such a way as to maintain or reduce salt loading and concentrations of salt in water supplies.

Drainage of irrigated land is required to reduce waterlogging and soil salinization that inevitably accompanies waterlogging in arid zones. At present, about 20-30 million hectares of irrigated land are seriously affected by salinity.

   
     
   
   
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