| In recent decades, with development of exploitation level of groundwater resource, in many intensitive groundwater pumping areas, geo-environment problems due to groundwater over-exploitation, such as groundwater level decline, groundwater contamination, land subsidence, have appeared. Therefore, for sustainable development of groundwater resource, the protection of such resource is extremely important. The study of vulnerability of groundwater quality is an effective implement to prevent groundwater contamination, protect groundwater resource and realize sustainable development of groundwater resource, and it is.In this thesis, based on summarizing current development of groundwater vulnerability evaluation and application, according to specific conditions and problems in Jining City, with thorough analysis of impact mechanism of each elements on groundwater vulnerability, 6 indexes were selected to establish evaluation system for vulnerability of groundwater quality: groundwater depth, net recharge to aquifer, groundwater conductivity, groundwater exploitation intensity, and current condition of groundwater quality. Integrative Index Method and Fuzzy Method were applied to evaluate groundwater quality, Visual MODFLOW was used to establish numerical simulation model of groundwater flow and solute transport, and then spatial distribution of net recharge to aquifer and conductivity was obtained.Spatial distribution and rating maps of each index according to observed and simulation result were drawn with GIS, and then comprehensive evaluation of groundwater vulnerability in study area was made. Finally, combined with "South-to-North Water Delivery" and Artificial Recharge Program, prediction project was designed. Using groundwater exploitation intensity and groundwater depth of prediction result of designed schemes, integrated evaluation on vulnerability of groundwater quality was made again, which provide importantbasis for the implementation and constitution of groundwater resource management, land utilization and city environment management guidelines. |
