Evaluation of Benefits of Comprehensive Management of Groundwater Over-exploitation
Comprehensive management of over-exploitation of groundwater is a major decision-making deployment to strengthen the construction of ecological civilization in the new era and safeguard national water security,and it is a strate-gic project to lay a foundation for long-term benefits.The effectiveness of its governance is related to the effectiveness of the advancement of the governance work,which is the key to measure the level of comprehensive governance of groundwater overdraft.In order to quantitatively evaluate the comprehensive management benefit of groundwater over-exploitation area,a multi-level evaluation system of ″target,criterion,and index″ was constructed based on the ″eight criteria″ and 18 required indicators and 12 alternative indicators.Combined with analytic hierarchy process(AHP)and entropy weight method to de-termine the index weight,the method of ″single index quantification,multi-index synthesis,multi-criteria integration″ is ap-plied to calculate the comprehensive governance benefit Index(GGI)of groundwater over-exploitation.The comprehensive treatment level of groundwater overextraction was quantitatively evaluated,and the case study of comprehensive treatment benefit evaluation of groundwater overextraction was carried out in Hua County,Neihuang County and Tangyin County of Henan Province.The results are as follows.The comprehensive benefit index of groundwater over-exploitation in Hua County,Neihuang County and Tangyin County is sound.The main restricting factors are the change amplitude of groundwater level,the standard of groundwater quality and the number of carriers of water culture inheritance.Based on the results of the study,the author puts forward some improvement measures such as increasing water supply through multiple channels,optimizing agricultural planting structure,reforming and upgrading production technology of enterprises,and strengthening publicity and education.The results show that the evaluation system can truly reflect the effect of comprehensive treatment of ground-water over-exploitation,and can provide reference for comprehensive treatment of groundwater over-exploitation.
comprehensive management of groundwaterbenefit evaluationevaluation systemevaluation indexevalua-tion method
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