Analysis On Groundwater Artificial Recharge Based On GIS

In this paper, the necessity of implementation of groundwater artificial recharge is analyzed first, according to current situation and trend of groundwater supply and demand, and feasibility analysis is made based on thorough study of recharge source, storage and dynamic conditions. It is established with Visual MODFLOW software the numerical model of study area, Jining City, and regional water balance is also analyzed. Then four artificial recharge schemes are designed, and corresponding groundwater level and water balance are compared. Finally, it is proposed an evaluation method and indicator system for artificial recharge, spatial distribution of recharge potential is analyzed with ArcGIS software, and general conclusion to groundwater artificial recharge of study area is reached accordingly.As is shown by feasibility analyses, if inducing surface water underground affirmatively, considering the depleted space in aquifer and restrictive hydraulic condition, it is feasible to carry out artificial recharge. It is demonstrated by the water balance analysis of numerical model, that during simulation period, in study area, annual depletion volume of aquifer is 3448×l0~4m~3, and infiltration of precipitation takes a chief part in total recharge, while pumping is a main discharge item. Different schemes, such as restriction of pumping, induced infiltration, recharging during winter, utilization of foreign water, etc. will all enhance groundwater recharge to some degree, and a combined implementation may lead to more effective recovery of aquifer. From artificial recharge potential analysis with index method, it is drawn such conclusion accordant with former analysis that, areas of high potential are city center and middle part of north plain. All the conclusions above are of great significant to artificial recharge and groundwater resource planning and management in the future.