Yanqi Basin is located in Xinjiang Uygur Autonomous Region. Recently, Plain of the middle and lower reaches of the basin water table generally increased, about 62% of the irrigation area groundwater level is less than 2m, most of the soil in the plains have seriously salinizated; the quantity of the water which flow into the Bosten lake have decreased, the surface of the lake have shrinked; a large number of agricultural drainage flow into the Bosten lake which lies in the southeastern of the base which res...