蓟县盘山地区浅层地下水水质分布特征及影响因素识别

Analysis of variation and its influence factors of the shallow groundwater quality in the Panshan area of Jixian,Tianjin

针对天津市蓟县盘山地区官庄镇开展了丰水期(2013年7~9月)与枯水期(2014年3~4月)地下水水质取样与分析。利用多元统计法研究了该区地下水总硬度、SO_4^(2-)、NO_3^-、Cl^-、TDS、Ca^(2+)、Mg^(2+)、Na^+和COD_(Mn)等9项指标的季节变化。采用因子分析法对地下水水质影响因素进行了识别,并通过一元线性回归分析识别地下水水质因子与研究区人口密度、耕地比例、禽类养殖、农家院数量和工业产值等之间的相关性,识别出地下水污染来源。结果显示:丰水期水质劣于枯水期水质,溶滤作用和生活污染是研究区水质的主要影响因素,工业污染和商业服务均对该区地下水造成明显影响。

Water samples are collected in flood season （July, August and September） and average season （March and April） in the Panshan area of Jixian, Tianjin city in 2013. Multivariate statistics analysis are used to study the seasonal variation of the nine indicators of groundwater including of total hardness, SO4^2-,NO3^-,Cl^-,TDS,Ca^2＋,Mg^2＋,Na^＋ and CODMn. Influencing factors of groundwater quality variation are identified by factor analysis. The unitary linearity regression method are used to explore the correlation of groundwater quality and the population density, proportion of cultivated land, the number of livestock breeding, the number of farmyards and industrial production.This article shows the source of groundwater pollution.The results show that water quality in flood season is worse than that in average season. Leaching effect and domestic pollution are main influencing factors. Industrial pollution and commercial services have significant impact to the groundwater.