Establishment of undergroundwater quality index (GWQI) and application to Hai Lang district, Quang Tri province
In-Press (Vietnamese)

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1.
Trương TK, Mai TTT, Trương QT, Nguyễn VH. Establishment of undergroundwater quality index (GWQI) and application to Hai Lang district, Quang Tri province. hueuni-jns [Internet]. 2024Oct.9 [cited 2024Dec.2];133(1C). Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/7301

Abstract

In this study a Ground Water Quality Index (GWQI) was established and applied to Hai Lang district in Quang Tri province. Ten basic water quality parameters selected for establishment of the GWQI consisted of: pH, TDS, hardness (HARD); SO4, COD, N-NH4, N-NO3, Fe, Mn and Total coliform (TC). Principal component analysis (PCA) was applied to the monitoring data set of the period 2015-2018 in the district to determine the weights (wi) of the parameters. The linear sub-index functions (qi) were set up basing on the allowable limits of the parameters specified in the National Technical Regulation on Domestic Water Quality (QCVN 01-1:2018/BYT) issued by the Ministry of Health. Three (3) different methods were used to calculate index GWQIM (multiplicate form), GWQIA (additive form) and GWQIRef (reference form) for the water quality data set. The indexes were all funtions of sub-index qi and weights wi. The obtained results show that the index GWQIM is more suitable than GWQIA and GWQIRef in reflecting the groundwater quality. Applying the GWQIM to the water quality data set of the period 2019 - 2021 in the district indicated that there are 89% of GWQIM values classified as Very good or Good water quality, 7% as Medium 1% as Poor and 3% as Very poor (or Unfit for drinking).

https://doi.org/10.26459/hueunijns.v133i1C.7301
In-Press (Vietnamese)
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