Effect Analysis And Process Evaluation Of Restricted Groundwater Over-extraction In Hengshui City,Hebei Province

With the rapid development of the regional national economy,the groundwater over-exploitation phenomenon in Hebei Province has been extended for more than 40 years since the 1970s,and serious ecological and environmental problems have emerged.The state attaches great importance to this situation and has invested a large amount of Manpower and material resources to carry out over-extraction actions.After three years of pilot work to limit groundwater over-exploitation,Hebei Province has achieved initial results.This year,the"North China Regional Groundwater Over-integration Action Plan" was officially launched,which will undoubtedly become a Beijing-Tianjin-Hebei period in the future.A programme of action for comprehensively limiting the work of over-exploitation of groundwater.From the current implementation of measures to limit groundwater over-exploitation and the analysis of the effects of limiting over-exploitation,It can be seen that the "enhanced supervision" of the groundwater over-harvesting process must be implemented quickly.It should not be limited to the initial benefits,but also the actual efficiency of the investment,and the work should be carried out in an orderly and long-term manner.Based on the implementation of measures to limit groundwater over-exploitation in Hengshui City for three years,this paper collects relevant data,analyzes the effects of limiting over-exploitation,studies the schemes that limit groundwater over-exploitation,and regulates the various processes of limiting groundwater over-exploitation.And design a process-based and subject-based evaluation model,using modern information technology to develop a process evaluation system that limits the effects of groundwater over-exploitation.The main research contents are as follows:(1)Review literature,collect data,conduct on-the-spot investigation,analyze the over-exploitation situation of groundwater in the study area,and sort out the measures and schemes for groundwater to limit groundwater over-exploitation,from the dynamic changes of groundwater elements and the temporal and spatial distribution and variation of related characteristic elements.In this aspect,it summarizes the effects of restricting groundwater over-exploitation over the years.(2)The index set for evaluating the effect of limiting groundwater over-exploitation was constructed.The comprehensive index method and grey relational analysis method were selected as the comprehensive evaluation method.In this paper,the measures and schemes for restricting groundwater exploitation are explored,and the process and visual expression of the scheme are explored.The process evaluation model of the effect of groundwater over-extraction is proposed,and the evaluation theme is established based on the problem,and the indicators under different themes are screened.Process evaluation,service process,program method selection and other content.(3)Using the design idea of business componentization,effect process,and program visualization,the process evaluation system for limiting the groundwater over-exploitation in Hengshui,Hebei Province was developed.The development customization and evaluation service of the business components in the development process are described in detail.In the visual evaluation system,the real-time update of the database data ensures that the actual limit over-extraction work is synchronized with the evaluation service;The visual evaluation system can query the implementation of the measures in the process of groundwater over-exploitation and the effect of phased management in real time,and carry out phased evaluation and implementation of action orientation.The procedural evaluation focuses on the evaluation of the topic details and provides timely feedback,which facilitates comprehensive evaluation and annual assessment in various fields.(4)Test the operation of the system service by using the data in the implementation process of Hengshui City.The case evaluation based on the process of limiting the effect of groundwater over-exploitation shows that the“enhanced supervision”that limits groundwater over-exploitation can rely on process evaluation,and the process-based follow-up evaluation is the guarantee for the effective implementation of measures;using principal component analysis and single-index evaluation The method can evaluate and identify the impact factors,and guide and support the improvement of the plan to limit the over-exploitation of groundwater according to the evaluation results.Compared with the traditional evaluation,the new model can be seen to be advanced and efficient.