大武岩溶水源地地下水水化学特征及其影响因素

选取北方典型岩溶裂隙含水系统,利用水文地球化学方法和统计学方法分析其地下水水化学特征及其影响因素,结果表明:沿着地下水主径流路径,地下水水化学类型种类逐年增加,除水岩作用外影响水化学类型的Ca~(2+)、Cl~-、Na~+、SO_4~(2-)多来源生活污水、工业废水和生活垃圾,且地下水中挥发性有机污染物的检出及NO_3~-、VOCs时空输入的多变性,表明区内地下水水化学持续受到人类活动的影响;利用比例系数法和因子分析法等获知影响地下水水化学的主要过程为水岩相互作用、阳离子交替吸附作用及溶滤作用,综合分析水化学类型和聚类分析可解译出监测点接收的物质组分及来源、地下水水化学动态变化过程及影响因素。

Hydrochemical characteristics of groundwater and its influencing factors in Dawu karst water source

Karst aquifer medium is usually inhomogeneous, and hydrogeological parameters are hard to obtain. Using a multivariate statistical method, graphic method, ions ratio method combined with karst hydrogeological conditions is an important tool to study hydrogeo chemical evolution and its influencing factors. Atypical karst water source in North China was selected to examine its hydrochemical characteristics and its influencing factors using hydrog eochemical technologies and statistical methods. Along the groundwater flow path, the types of hydrochemistry were increasing year by year. In addition to the role of water and rock, Ca2+ , Cl- , Na+ and SO4 2- multisource domestic sewage, industrial wastewater and domestic garbage affect the hydrochemistry types. The detection of volatile org anic compounds ( VOCs) and the different recharging features of NO3 - , VOCs spatiotemporal indicated that the groundwater hydro chemistry is continuously affected by anthropogenic activities. The main processes influencing groundwater environment in the study ar ea were water-rock interaction, cation exchange and adsorption, lixiviation, and human activities, which can be interpreted by ion r atio, correlation analysis, factor analysis and wastewater sources of groundwater sampling points, dynamic variation processes of gro undwater chemistries and their influencing factors.