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Relative water quality index (ReWQI) – a new method for aggregate water quality assessment
Water and Environment Journal Số , năm 2020 (Tập , trang -)
ISSN: 17476585
ISSN: 17476585
DOI: 10.1111/wej.12586
Tài liệu thuộc danh mục: Scopus
Article
English
Từ khóa: Aggregates; Quality assurance; Scales (weighing instruments); Water quality; Arbitrary number; Department of natural resources; Linear functions; Rating scale; United States of America; Water pollution levels; Water quality assessments; Water quality indexes; Water pollution; article; calculation; human; natural resource; rating scale; United States; Viet Nam; water quality
Tóm tắt tiếng anh
Water quality index (WQI) is used for aggregate assessment of water pollution level. The method is used in the United States of America (USA) and some other countries including Vietnam, but it has several limitations: the weight of a parameter is subjectively defined by the experts' criteria; the hierarchical rating scale is self-regulated and fixed; the individual index of WQI is calculated based on the segmented linear function, which are not convenient to apply in reality when expanding to an arbitrary number of selected survey parameters. In addition, in some cases, WQI results in ambiguity and eclipse (collectively called ‘Virtual effect’). To overcome these disadvantages, the author proposes Relative Water Quality Index (ReWQI). ReWQI's calculation is simple and it does not encounter ‘Virtual effect’. Results of ReWQI have been compared with results of the traditional method used by Department of Natural Resources and Environment of Hai Duong in 2016–2018. © 2020 CIWEM
