Modification of the Water Quality Index (WQI) process for simple calculation using the Multi-Criteria Decision-Making (MCDM) method: A review

Akhtar, Naseem and Ishak, Muhammad Izzuddin Syakir and Ahmad, Mardiana Idayu and Umar, Khalid and Yusuff, Mohamad Shaiful Md and Anees, Mohd Talha and Qadir, Abdul and Almanasir, Yazan Khalaf Ali (2021) Modification of the Water Quality Index (WQI) process for simple calculation using the Multi-Criteria Decision-Making (MCDM) method: A review. Water, 13 (7). ISSN 2073-4441, DOI https://doi.org/10.3390/w13070905.

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Abstract

Human activities continue to affect our water quality; it remains a major problem worldwide (particularly concerning freshwater and human consumption). A critical water quality index (WQI) method has been used to determine the overall water quality status of surface water and groundwater systems globally since the 1960s. WQI follows four steps: parameter selection, sub-indices, establishing weights, and final index aggregation, which are addressed in this review. However, the WQI method is a prolonged process and applied to specific water quality parameters, i.e., water consumption (particular area and time) and other purposes. Therefore, this review discusses the WQI method in simple steps, for water quality assessment, based on two multi-criteria decision-making (MCDM) methods: (1) analytical hierarchical process (AHP); and (2) measuring attractiveness by a categorically based evaluation technique (MACBETH). MCDM methods can facilitate easy calculations, with less effort and great accuracy. Moreover, the uncertainty and eclipsing problems are also discussed-a challenge at every step of WQI development, particularly for parameter selection and establishing weights. This review will help provide water management authorities with useful knowledge pertaining to water usage or modification of existing indicators globally, and contribute to future WQI planning and studies for drinking, irrigation, domestic, and industrial purposes.

Item Type: Article
Funders: Universiti Sains Malaysia[11800]
Uncontrolled Keywords: Water quality assessment;Physicochemical and biological parameters;Water quality index;Multi-criteria decision-making;Analytical hierarchical process;MACBETH
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QE Geology
Divisions: Faculty of Science
Depositing User: Ms Zaharah Ramly
Date Deposited: 20 Jul 2022 02:52
Last Modified: 20 Jul 2022 02:52
URI: http://eprints.um.edu.my/id/eprint/34032

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