Research On The Evaluation Of The Control Effect Of Groundwater Overexploitation In Hebei Province

Due to the shortage of surface water resources,the Beijing-Tianjin-Hebei region has long relied on over-exploitation of groundwater to support economic and social development,resulting in serious overexploitation of groundwater and causing ecological and environmental geological problems such as land subsidence and ground fissures.The state attaches great importance to the treatment of groundwater overexploitation in the Beijing-Tianjin-Hebei region.In 2014,it launched a pilot project for comprehensive treatment of groundwater overexploitation in Hebei Province.Mining problems.Hebei Province,as an important part of the BeijingTianjin-Hebei region,dynamically tracks and scientifically evaluates the effect of groundwater over-exploitation control in Hebei Province,which is useful for deepening the control of groundwater over-exploitation in Hebei Province,effectively solving the problem of groundwater over-exploitation in Beijing-Tianjin-Hebei,and ensuring the safety of regional water supply.Significance.Based on the national key research and development project "Xiongan New Area Multi-source Joint Allocation and Groundwater Protection",this article carried out the groundwater overexploitation control effect evaluation research in Hebei Province.The main content and results are as follows.(1)On the basis of summarizing the relevant research results of the groundwatereconomic society-ecological environment system,the interaction relationship between the groundwater-economic society-ecological environment system is clarified,and the effect of overexploitation on the groundwater-economic society-ecological environment system is analyzed.Systematic summary of groundwater overexploitation control measures,starting with groundwater over-exploitation control measures,in-depth analysis of the impact of over-exploitation control on the groundwater-economic society-ecological environment system,and excavated factors affecting the effect of groundwater over-exploitation control.(2)Based on the analysis results of the influencing factors of groundwater overexploitation control effect,and following the principle of index system construction,the over-exploitation control effect evaluation index system covering the groundwatereconomic society-ecological environment system has been constructed,and the“ single index quantification-multi-index integration has been introduced.-Multicriteria integration ”(SMI-P)comprehensive evaluation method,established a quantitative evaluation model of groundwater over-exploitation control effect,proposed a multi-element coupling groundwater over-exploitation control effect evaluation method,and developed a fast,efficient,reliable,visualized,etc.Characteristic evaluation system of groundwater overexploitation control effect.(3)According to the status,control measures and implementation of groundwater overexploitation in Hebei Province,the evaluation index system of groundwater overexploitation control effect in Hebei Province was established,and the evaluation index threshold of groundwater overexploitation control effect in Hebei Province was reasonably determined;groundwater overexploitation based on development The governance effect evaluation system evaluated the groundwater overexploitation control effect in Hebei Province and various cities from 2014 to 2019,and analyzed the change trend and main reasons of the groundwater overexploitation control effect in Hebei Province and various cities.The evaluation results show that during the period2014 to 2019,the effect of groundwater over-exploitation control in Hebei Province has shown an overall upward trend,and the over-exploitation control effect has been upgraded from a poor level in 2014 to a good level in 2019;groundwater,economic,social,and ecological environment systems The effect of over-exploitation control is on the rise.Among them,the over-exploitation control effect of groundwater system has been raised from the poor level in 2014 to the medium level in 2019,the overextraction control effect of the economic and social system has been raised from the passing level to the medium level,and the ecological environment system has exceeded the level.The effect of mining control has been raised from a pass level to a good level;the control effect of groundwater over-extraction in various cities is generally on the rise.In 2019,the over-extraction control effect of Qinhuangdao City is excellent,with Baoding,Cangzhou,Handan,Langfang,Shijiazhuang,Tangshan,Zhangjiakou and other cities have achieved good over-exploitation control effects,while Hengshui and Xingtai cities have medium-level over-exploitation control effects.(4)Put forward countermeasures and suggestions for the in-depth implementation of groundwater over-exploitation control in Hebei Province,including promoting water-saving efficiency in agriculture,accelerating industrial water-saving and emission reduction,strengthening urban water-saving and loss-reducing and other key areas to save water,and reducing groundwater extraction;Channels increase water supply,improve unconventional water utilization engineering systems;carry out ecological replenishment of rivers and lakes to improve the ecological environment;strict groundwater management,and deepen water resource tax and water rights and water pricing reforms.