Dynamic analysis of groundwater in Yicheng Basin

Studies on the dynamic characteristic of regional groundwater and exploration of groundwater rule of motion have vital significance to guide rational development and utilization of groundwater resources,and ecological environmental protection.This article has analyzed the groundwater dynamic characteristic of Yicheng Basin,provided important basis for rational development and utilization of groundwater resources.Yicheng Basin is located in the south of Shandong.It's stratum is mainly composed by quaternary clay,cambrian and ordovician limestone.Limestone-rich water is better for the basin's major aquifers.In the bare rock section of the basin surrounding,by analyzing the observed data of underground water in Yicheng Basin,it's known that the promotion and demotion of groundwater level are synchronized with the precipitation,the change extent of groundwater level is great.Since basin abdomen is covered by Quaternary,groundwater table has a lag time to precipitation.According to analysis of the groundwater table contour map,Yicheng basin groundwater flow naturally to the direction of local building river village and assembles to there in 1981,after mining Forest Bridge section in Ten Li Spring Power Plant in 1995,the formation of groundwater depression cone makes basin abdomen groundwater assembles to Linqiao vicinity.After Linqiao mining stopped in 2009,groundwater level recovered gradually,groundwater assembled to the direction of local building river village again.Therefore Yicheng basin groundwater movement is greatly influenced by the precipitation and manual mining.