Year: 2025
Type: article
Abstract: The Groundwater Quality Index (GWQI) was developed and applied to assessment of groundwater quality in Ha Tinh province. This study utilized water quality monitoring data in 2018 - 2020 period at 58 locations with a frequency of 4 times/year in 13 districts, towns and city in the province. Ten (10) parameters were selected (i = 1 - 10) to establish the GWQI, including: pH, total dissolved solids (TDS), hardness (HARD); sulfate (SO4), chemical oxygen demand (COD), ammonium as nitrogen (N-NH4), nitrate as nitrogen (N-NO3), total dissolved iron (Fe), total dissolved manganese (Mn) and total coliform (TC). The weight (wi) of each parameter was based on principal component analysis (PCA) using monitoring data in 2018 and 2019. The sub-index (qi) of each parameter was determined by a linear function, based on the limit value specified in the National Technical Regulation on Domestic Water Quality (QCVN 01-1:2018/BYT). The GWQI as a function of wi and qi was calculated by the multiplicate formula. The results showed that in 2020, in the province 21.1% of GWQI values classified as VERY GOOD or GOOD, 31.9% as AVERAGE, 33.2% as POOR and 13.8% as VERY POOR.
Authors: Truong Trung Kien, Nguyen Dang Giang Chau, Nguyen Van Hop, Truong Quy Tung
Institutions: Hue University, Trường Đại học Khoa học, Đại học Huế
Language: English
Subfield: Water Science and Technology
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4409518890