天津市宁河县地下水安全AHP模糊评价浅析

由宁河县多年平均各含水组开采状况可知,第Ⅱ含水组开采比例占到了全县地下水总开采量的55%,开采强度在各含水组中也属最大,导致了该层地下水水位的持续下降,引起了地下水水质恶化、地下水资源枯竭、地面沉降等一系列环境地质问题。本文参考前人的研究成果,从地下水的安全内涵出发,构建了包括水质安全、水量安全、含水层安全和生态环境安全的4个一级评价指标,15个二级评价指标的地下水安全评价指标体系,建立了基于AHP的模糊综合评价模型,选取宁河县第Ⅱ含水组10个有代表性采样点进行安全现状分析,并在对地下水环境地质条件深入分析的基础上,量化了地下水安全评价分级标准,取得了与实际较为相符的结果。

Elementary Analysis on AHP Fuzzy Evaluation on Groundwater Sagety in Ninghe County of Tianjin

The artiCle is based on the average exploitation situation of aquifer groups in the past years.The exploitation proportion of the 2nd aquifer group account for 55% of the total groundwater extraction in the whole county and its mining strength is the most comparing with each group,which caused to a series of environment geological issues such as leading to the groundwater level fall continuously,groundwater quality deteriorate,groundwater resources dry up and the floor sedimentation.The artiCle is based on the past studied result and groundwater safety.It sets up four evaluation indexes of Class 1 together with the water quality safety,the water quantity safety,the aquifer safety and eco-environment safety and 15 indexes of Class 2 for groundwater safety evaluation system and establishes the fuzzy comprehensive evaluation model based on AHP.It takes 10 typical samples of the 2nd aquifer group in Ninghe county and carries on the safety analysis.According to the groundwater environment geology condition analysis,it make the groundwater safety evaluation standard quantification and achieves the likely result.