Open AccessEntropy weight application for calculating groundwater quality index (EWQI) in groundwater quality zoning in Pleistocene aquifer in the Phu My town, Ba Ria – Vung Tau province
Author(s) -
Nguyen Hai Au,
Tran Minh Bao,
Pham Thi Tuyet Nhi,
Tat Hong Minh Vy,
Truong Tan Hien,
Tran Ngoc Hiep,
Luu Khanh Linh
Publication year - 2020
Publication title -
khoa học và công nghệ: trái đất và môi trường
Language(s) - English
Resource type - Journals
ISSN - 2588-1078
DOI - 10.32508/stdjsee.v4i1.533
Subject(s) - groundwater , aquifer , hydrology (agriculture) , irrigation , water quality , environmental science , geology , geotechnical engineering , ecology , biology
Groundwater in Phu My town is exploited essentially in Pleistocene aquifer and, used for many purposes like irrigation, domestic, production and animal husbandry. In this study, Groundwater Quality Index (EWQI) is calculated with Entropy weight method to determine the suitability of groundwater quality in study area. This method demonstrates the objectivity of each parameter calculated based on the degree of variability of each value and depends on the sample data source. The groundwater samples were collected from 17 wells in dry and wet seasons in 2017 with ten water quality parameters (pH, TDS, TH, Cl-, F-, NH4+-N, NO3--N, SO42-, Pb và Fe2+) were selected for analysising. The analysis results indicate groundwater quality is divided into 4 categories in this study area. In particular, over 70% of wells are "very good" water quality in both dry and wet seasons. Only 6% of wells are " water unsuitable for drinking purpose" of the total number of mornitoring wells in the study area.