干旱区生态环境知识资源中心

West china is very arid especially around the Tarim basin. As scarce precipitation and intense evaporation causes water resource shortage in this area, the ground water deeply depends on the conversion of surface water such as rivers, reservoirs, manual channels, and the farms irrigation. Rainfall is not effective to groundwater. Based on the remote sense, the GPS measure, field investigation, geophysical exploration and probe drillings, the total supply of groundwater and the rational pumping yield of the Yarkant basin was determined combining qualitative analysis. The temporal and spatial variation of the groundwater level and the flow fields was forecasted after the new well field was put into use with Visual Modflow. Using Monte-Carlo stochastic method, the recharge was simulated and predicted. The results showed that the yield in the Yarkant valley was about 10.09x10(8) m(3)/a.