Effects of irrigation on groundwater recharge under deep buried depth condition

In this paper the dynamic changes of the groundwater levels and soil moisture were studied to realize the groundwater recharge. The irrigation recharge coefficient was calculated based on groundwater level and soil moisture and verified by the numerical model with MODFLOW. The average groundwater recharge coefficient was 0.0875 the whole year. With the deep groundwater level in Jinghuiqu Irrigation district the results from changes of groundwater showed that the time of recharge was longer. The soil moisture had a similar trend with the groundwater level. Overexploitation without recharge of groundwater led the decreasing of groundwater level. The research may provide as a reference to increasing the surface water irrigation for development of groundwater ecological environment of the district.