Evolution and Control of Groundwater Environment in the Qingnigou Area

Exploiting groundwater excessively engenders karst collapses in the Qingnigou area;man-made pollution has caused the shortage of fresh water.Based on an analysis of chemical environment and dynamic environment evolution of groundwater system,the allowable yield of karst water resources is estimated to be 41 000 m3/d through the numerical model of groundwater currents and this paper also provides countermeasures and decisions to prevent karst collapses and other water environment problems,such as controlling waste water,reducing and decentralizing exploitation of groundwater.