浅层地下水水质评价及其影响因素分析
2021-11-03邱新义孙林华彭位华陈凯赵祥
邱新义 孙林华 彭位华 陈凯 赵祥



摘 要:了解地下水水质状态及影响因素对于区域水资源管理具有重要意义。为了解宿州市浅层地下水水质及其影响因素,采用WQI饮用评价法对地下水水质进行评价,并通过Gibbs图、离子比值和空间插值对其影响因素进行了分析。结果表明:研究区地下水适合饮用,Mg2+、F-和Na+是影响水质的主要水化学参数。Gibbs图表明地下水离子组成受水岩相互作用控制,进一步通过离子比值分析得出Na+和Mg2+主要来源于硅酸盐矿物的溶解。此外,空间插值显示F-主要来源于含氟矿物的溶解。
关键词:浅层地下水;水质评价;水岩相互作用;影响因素
中图分类号 P597+2文献标识码 A文章编号 1007-7731(2021)19-0136-05
Shallow Groundwater Quality Assessment and Its Influencing Factors
——Take Suzhou City as an Example
QIU Xinyi1,2 et al.
(1School of Earth and Environment, Anhui University of Science & Technology, Huainan 232001, China; 2School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China)
Abstract: Understanding the groundwater quality and its influencing factors are important to manage regional groundwater resources. In this study, the Water Quality Index (WQI), Gibbs diagram, ion relationship and spatial interpolation method were applied for identifying the quality and influencing factors in shallow groundwater of Suzhou city, Anhui province. The results indicated that groundwater was suitable for drinking, and Mg2+, F- and Na+ were the main parameters for affecting the groundwater quality in the study area. Gibbs diagram showed that the hydrochemical composition of groundwater was controlled by water-rock interactions. According to ion relationship method, Na+ and Mg2+ were mainly originated from the weathering of silicate minerals. In addition, spatial interpolation showed that F- was mainly derived from the dissolution of fluorinated minerals.
Key words: Shallow groundwater; Water quality assessment; Water-rock interaction; Influencing factors
1 引言
隨着社会高速发展和人口的不断增加,全球水资源短缺已成为普遍存在的现象[1]。中国作为世界的一部分,也面临同样的问题[2]。华北地区多年平均水资源量仅占全国的4%,人均水资源量仅为全国平均水平的1/7[3]。与此同时,皖北地区人口及耕地分别占全省的45.4%、50.3%,而水资源总量仅占全省的13.68%[4]。
水资源短缺、水资源分布不均、水环境污染等问题日益突出,因此,对水资源的科学利用显得尤为重要。从目前看来,对于水资源利用的研究主要分为水量、水质2个方面[5-6]。在这些研究中,水质评价作为重要的定量化研究手段,在水资源利用方面发挥了极其重要的作用,并主要集中于各种评价方法运用(单因子评价法、内梅罗污染指数法等)[7-10]。与此同时,对于水质影响因素分析也同样至关重要[11-12]。……
