Study on Seepage Control Measures of Plain Reservoirs Based on Soil Salinization after Dam

Abstract

Agricultural ecosystem is fragile exceedingly in northwest arid area, the areas of land salinization and desertification account for more than one-third of the country, which is further increasing.However, reservoirs in mountain areas are further from farmland, whats more, high cost of conveyance and great loss need to build considerable the type of plain in injection reservoirs to meet the development of industry and agriculture, such is the case that the number of constructing many plain reservoirs has gone up to 578 so far in Xinjiang. But plain reservoirs shallow water depth, length of spur, high permeable depth of foundation, evaporation and leakage are both high.Plain reservoir leakage lifted the underground water level of the dam after large area of land, salt with water, the land salinization dam after ecological problems, such as more and more serious. As the An Jihai set reservoir as an example, for more than 50 years of operation, the down stream of the dam over 50kilometers of land are white the salinization of sights, many cultivated lands have been deserted.Therefore, we need to improve and solve the problems existing in the plain reservoir from the source to solve the leakage caused groundwater problems is necessary.