Analysis of Groundwater Dynamic Characteristics and Influencing Factors in Xiong'an New Area under Over-Exploitation Control Measures
It is of great significance to find out the dynamic characteristics and influencing factors of groundwater in Xiong'an New Area to ensure the sustainable utilization of groundwater resources and water supply safety in Xiong'an New Area.Based on the annual stratified groundwater level monitoring datum from 2000 to 2021,this paper analyzed the spatial distribution characteristics and evolu-tion law of shallow and deep groundwater level in Xiong'an New Area,and used random forest,numerical simulation and other meth-ods to determine the influencing factors of groundwater dynamic changes.The results show that:(1)Under the comprehensive influence of groundwater overexploitation control measures,the groundwater level in Xiong'an New Area has been steadily rising since 2014.The average annual rise of shallow groundwater level is 0.11 m,and the average annual rise of deep confined water level is 0.64 m since 2017.(2)Groundwater exploitation,precipitation and ecological water supplement of rivers and lakes are the main controlling factors af-fecting the change of groundwater level in Xiong'an New Area.In the past 20 years,the contribution rate of exploitation and precipita-tion to the change of groundwater level is 55％and 42％on average.In addition,large-scale ecological water replenishment has formed effective supply to groundwater resources.(3)Numerical simulation analysis showed that the contribution rate of excessive precipi-tation to the recovery of water level in Xiong'an New Area from 2019 to 2021 is as high as 63％.Deducting the impact of precipita-tion,it is necessary to continuously and deeply promote effective measures such as river and lake ecological environment recovery and water source replacement to consolidate and maintain the achieved governance results.
Xiong'an New Areagroundwater resourcesgroundwater levelinfluencing factors
万方数据
维普
