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VNUHCM Journal of

Science and Technology Development

An official journal of Viet Nam National University Ho Chi Minh City, Viet Nam since 1997

ISSN: 1859-0128
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Sciences of Earth and Environment - Research article Open Access Logo

Comparing the results of water quality assessment by fuzzy comprehensive evaluantion method and the water quality index: a case study in the Dong Nai river

Tran Hoang Bao Le 1, *
Ly Dinh Che 1
Than Hien Nguyen 1

  1. Institute for Environment and Resources, VNU-HCM
Correspondence to: Tran Hoang Bao Le, Institute for Environment and Resources, VNU-HCM. Email: pvphuc@vnuhcm.edu.vn.
Volume & Issue: Vol. 17 No. 2 (2014) | Page No.: 40-49 | DOI: 10.32508/stdj.v17i2.1301
Published: 2014-06-30

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Copyright © 2014 by the author(s).

Copyright The Author(s) 2023. This article is published with open access by Vietnam National University, Ho Chi Minh city, Vietnam. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. 

Abstract

The Dong Nai river is a source of supplying water for Ho Chi Minh city, Bien Hoa city and industrial areas. However, the status of the Dong Nai river has been seriously polluted which were caused by emission sources from urban areas, industrial zones, etc. In this study, the fuzzy comprehensive evaluation model (FCE) based on Entropy weight method was built to calculate pollution levels for 18 monitoring sites of the Dong Nai river with 7 parameters in the period 2005 – 2012. The results of study showed that the water quality of section 1 and section 2 are I level which mean good level. Section 3 is III ranking – medium pollution and section 4 is II ranking – slight pollution. Besides, the study also compared the results of the water quality between FCE and the water quality index (WQI). The results indicated that there isn’t difference between two methods. However, the FCE method is more practical, reasonable and acceptable. FCE was less affected by abnormal values than WQI.

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