Groundwater Quality Evaluation of the Dawu Water Source Area Based on Water Quality Index (WQI): Comparison between Delphi Method and Multivariate Statistical Analysis Method

Water

Zhizheng Liu¹  Xiaowei Cui²  Xiaoyu Luan²  Lu Chen²  Long Zhang²  Zhaojie Cui²  Wei Wang³  Henghua Zhu³ 

[1] Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China;School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China;Shandong Institute of Geological Survey, Jinan 250014, China;

关键词: Dawu water source area;    groundwater quality;    water quality index (WQI);    Delphi method;    multivariate statistical analysis;    entropy weight method;   

DOI  :  10.3390/w13081127

来源: DOAJ

【 摘 要 】

Water quality in the Dawu water source area is primarily studied through the traditional water quality assessment method that measures the chemical parameters of water against the existing standards, which is simple but cannot accurately describe the water quality. Although the water quality index (WQI) proposed by Horton is widely used for comprehensive water quality evaluation, parameter selection and weight determination are primarily based on the Delphi method, which is subjective and random. Moreover, in groundwater evaluation, the focus is primarily laid on general chemical parameters, such as Total Dissolved Solids, hydrogen ion concentration, Electrical Conductivity, and heavy metals, such as Hydrargyrum, Arsenic, and Chromium, with limited consideration for organic pollutants. In this study, WQI technology in combination with the entropy weight method was used to evaluate the groundwater environmental quality of the Dawu water source area, and the scientific results were analyzed by comparing the full index, Delphi, and multivariate statistical analysis methods. The results showed that the groundwater in the Dawu water source area generally had good quality and was potable and that the application of multivariate statistical analysis method was more suitable than the Delphi method in the index selection process.

【 授权许可】

Unknown