洞庭湖上游平原浅层地下水水质综合评价  

Comprehensive evaluation of shallow groundwater quality in upper plain of Dongting Lake

作　　者：袁瑞强[1] 钟钰翔 龙西亭[2] YUAN Ruiqiang;ZHONG Yuxiang;LONG Xiting(School of Environment&Resource Sciences,Shanxi University,Taiyuan 030006,China;The 402 Team,Bureau of Geology and Mineral Resources Exploration of Hunan Province,Changsha 410014,China)

机构地区：[1]山西大学环境与资源学院,山西太原030006 [2]湖南省地质矿产勘查开发局四零二队,湖南长沙410014

出　　处：《水资源保护》2021年第6期121-127,共7页Water Resources Protection

基　　金：国家自然科学基金(41301033)。

摘　　要：采用综合指数法、主成分分析(PCA)法和BP神经网络法对洞庭湖上游平原浅层地下水雨、旱季水质进行了综合评价,并分析了3种方法的适用性。结果表明:洞庭湖上游平原浅层地下水存在大面积地质成因污染和局部人为成因污染;雨季西洞庭湖平原澧水和沅江之间以及南洞庭湖平原资江下游浅层地下水为Ⅳ类水,可用于灌溉,不适宜饮用,雨季后受到降水补给、稀释作用,各指标质量浓度普遍降低。BP神经网络法适合整体水质评价,评价结果最合理;PCA法较简单,水质综合评价的结果与BP神经网络法的结果更接近;综合指数法的评价结果受主要污染指标的影响较大,适用于严苛的水质评价。The comprehensive index method,principal component analysis method,and BP neural network method were used to investigate and evaluate the water quality of shallow groundwater in the upper plain of Dongting Lake in rainy and dry seasons.The applicability of the above methods was also discussed.The results show that the shallow groundwater in the upper plain of Dongting Lake has regional geological pollution and local anthropogenic pollution.In the rainy season,the shallow groundwater between the Lishui and Yuanjiang rivers in the West Dongting Lake Plain and around the Zijiang River in the South Dongting Lake Plain is GradeⅣin water quality,which can be used for irrigation but is not suitable for drinking.After the rainy season,the concentrations of indicators generally decrease due to the dilution induced by precipitation infiltration.The BP neural network method is suitable for comprehensive water quality evaluation,providing the most reasonable result of overall water quality in the study area.The principal component analysis method is relatively simple,with the result being close to that of the BP neural network method.The evaluation result of the comprehensive index method is greatly affected by the most important pollution indicator and is suitable for severe water quality evaluations.

关 键 词：地下水 水质综合评价 综合指数法 主成分分析 人工神经网络 洞庭湖上游平原 

分 类 号：TV213.4[水利工程—水文学及水资源] X824[环境科学与工程—环境工程]