Study on Net Groundwater Recharge after Ecological Water Conveyance in the Lower Reaches of Tarim River

The groundwater depth was monitored in nine groundwater-monitoring sections and forty monitoring wells during water conveyance for the lower reaches of the Tarim River from 2000 to 2006.This paper analyzed the response of groundwater depth to water conveyance.The results showed that the total net volume of recharged groundwater was 78 248.7×104 m3 after ecological water conveyance,accounting for 35.63% of the ecological inflow water.Among the eight water conveyance processes,the groundwater recharge was positive except the second and the sixth.The transverse influenced range of groundwater has close relation with the water conveyance amount and duration,extending with water conveyance processes.With distance increasing from water source the transverse influenced range of groundwater becomes narrow,showing alienated relation of groundwater recharge with distance from water source.