Study On The Comprehensive Treatment Effect Of Groundwater Over Mining Area In Linzhang County

In order to curb the current problem of over exploitation of groundwater in North China and protect groundwater resources,all localities have carried out comprehensive treatment research on over exploitation of groundwater in order to solve the increasingly serious problem of structural water shortage.This thesis selects Linzhang County in North China as the research object,studies the current situation and treatment mode of water resources in this region,summarizes the measures and treatment effect of comprehensive treatment of groundwater overexploitation in Linzhang county from2016 to 2020,and evaluates the comprehensive effect of comprehensive treatment of groundwater overexploitation in Linzhang County by using analytic hierarchy process.This thesis draws the following conclusions:(1)Linzhang county is located in the plain of Taihang Mountains,with an area of744km2,The average total water consumption of the county is 170 million m3.From the specific composition of water consumption,agricultural water consumption reaches 140 million m3,Accounting for more than 86%;From the buried depth,the groundwater in the county is between 8 ? 32 m underground;In terms of exploitation amount,the theoretical exploitable amount of groundwater is 96.42 million m3,The actual mining volume is 144.6 millionm m3,48.18 million has been over mined m3.(2)Linzhang county has implemented comprehensive treatment measures,vigorously developed agricultural water-saving,engineering water-saving and market management water-saving measures,and promoted the treatment of groundwater overexploitation.The pressure recovery from 2016 to 2020 was 22.0489 million m3;The newly added or reconstructed water-saving irrigation area is 221515 mu.Among them,18787800 mu of high standard pipe irrigation,31021 mu of sprinkler irrigation and 2616 mu of micro irrigation.Add 69.48 km of water supply pipe network and its ancillary facilities and crossing works of water supply station.Good water-saving effect has been achieved.(3)Using the analytic hierarchy process,this thesis establishes the relevant index system for the evaluation of comprehensive treatment of groundwater overexploitation in Linzhang County,analyzes the evaluation results of comprehensive treatment of groundwater overexploitation in Linzhang county from the aspects of index selection,standard determination,system establishment,matrix structure and weight determination,and finally calculates the final value of comprehensive treatment of groundwater overexploitation in Linzhang county through comprehensive calculation according to the analytic hierarchy process The score was 81.75,and the treatment effect was good.The comprehensive treatment scheme of groundwater overexploitation in Linzhang county has a good effect,and the constructed effect evaluation system can be popularized and used.