Simulation of Artificial Recharge for a Groundwater Reservoir:A Case Study of the Daguhe Groundwater Reservoir

In recent years, many barrages have been founded in the Dagu River, which greatly change the conditions of the exploitation and supply of ground water. On the basis of analyzing the hydrogeological conditions and the water resource utilization of groundwater reservoirs, a quasi-three-dimensional groundwater flow model is built to simulate the groundwater flow through the finite-difference method using Visual Modflow software. The research region is divided into eleven parts after analyzing the hydrogeological conditions. After calibrating and adjusting the parameters using measured data, the calibrated model reflects the actual conditions very well. Using the model, this paper analyzes the recharge capacity of the Rubber Dam for groundwater storage. The results are as follows: (1) the amount of supplemental recharge of the Rubber Dam gradually increases from February to May but decreases gradually from September to December, (2) the ratio of induced recharge to induced withdraw shows an upward trend. Therefore it can be concluded that municipal withdraw near a Rubber Dam will stimulate more surface water to become ground water to ensure the sustainable development of groundwater reservoirs.