A review of water quality index models and their use for assessing surface water quality

The water quality index (WQI) model is a popular tool for evaluating surface water quality. It uses aggregation techniques that allow conversion of extensive water quality data into a single value or index. Globally, the WQI model has been applied to evaluate water quality (surface water and groundw...

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Autores principales:	Md. Galal Uddin, Stephen Nash, Agnieszka I. Olbert
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	water quality index (WQI) Surface water quality Water quality parameters Sub-index Aggregation function Model uncertainty and sensitivity Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/47b5e12a832c492da53427a74e2f147d
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id	oai:doaj.org-article:47b5e12a832c492da53427a74e2f147d
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spelling	oai:doaj.org-article:47b5e12a832c492da53427a74e2f147d2021-12-01T04:39:16ZA review of water quality index models and their use for assessing surface water quality1470-160X10.1016/j.ecolind.2020.107218https://doaj.org/article/47b5e12a832c492da53427a74e2f147d2021-03-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20311572https://doaj.org/toc/1470-160XThe water quality index (WQI) model is a popular tool for evaluating surface water quality. It uses aggregation techniques that allow conversion of extensive water quality data into a single value or index. Globally, the WQI model has been applied to evaluate water quality (surface water and groundwater) based on local water quality criteria. Since its development in the 1960s, it has become a popular tool due to its generalised structure and ease-of-use. Commonly, WQI models involve four consecutive stages; these are (1) selection of the water quality parameters, (2) generation of sub-indices for each parameter (3) calculation of the parameter weighting values, and (4) aggregation of sub-indices to compute the overall water quality index. Several researchers have utilized a range of applications of WQI models to evaluate the water quality of rivers, lakes, reservoirs, and estuaries. Some problems of the WQI model are that they are usually developed based on site-specific guidelines for a particular region, and are therefore not generic. Moreover, they produce uncertainty in the conversion of large amounts of water quality data into a single index.This paper presents a comparative discussion of the most commonly used WQI models, including the different model structures, components, and applications. Particular focus is placed on parameterization of the models, the techniques used to determine the sub-indices, parameter weighting values, index aggregation functions and the sources of uncertainty. Issues affecting model accuracy are also discussed.Md. Galal UddinStephen NashAgnieszka I. OlbertElsevierarticlewater quality index (WQI)Surface water qualityWater quality parametersSub-indexAggregation functionModel uncertainty and sensitivityEcologyQH540-549.5ENEcological Indicators, Vol 122, Iss , Pp 107218- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	water quality index (WQI) Surface water quality Water quality parameters Sub-index Aggregation function Model uncertainty and sensitivity Ecology QH540-549.5
spellingShingle	water quality index (WQI) Surface water quality Water quality parameters Sub-index Aggregation function Model uncertainty and sensitivity Ecology QH540-549.5 Md. Galal Uddin Stephen Nash Agnieszka I. Olbert A review of water quality index models and their use for assessing surface water quality
description	The water quality index (WQI) model is a popular tool for evaluating surface water quality. It uses aggregation techniques that allow conversion of extensive water quality data into a single value or index. Globally, the WQI model has been applied to evaluate water quality (surface water and groundwater) based on local water quality criteria. Since its development in the 1960s, it has become a popular tool due to its generalised structure and ease-of-use. Commonly, WQI models involve four consecutive stages; these are (1) selection of the water quality parameters, (2) generation of sub-indices for each parameter (3) calculation of the parameter weighting values, and (4) aggregation of sub-indices to compute the overall water quality index. Several researchers have utilized a range of applications of WQI models to evaluate the water quality of rivers, lakes, reservoirs, and estuaries. Some problems of the WQI model are that they are usually developed based on site-specific guidelines for a particular region, and are therefore not generic. Moreover, they produce uncertainty in the conversion of large amounts of water quality data into a single index.This paper presents a comparative discussion of the most commonly used WQI models, including the different model structures, components, and applications. Particular focus is placed on parameterization of the models, the techniques used to determine the sub-indices, parameter weighting values, index aggregation functions and the sources of uncertainty. Issues affecting model accuracy are also discussed.
format	article
author	Md. Galal Uddin Stephen Nash Agnieszka I. Olbert
author_facet	Md. Galal Uddin Stephen Nash Agnieszka I. Olbert
author_sort	Md. Galal Uddin
title	A review of water quality index models and their use for assessing surface water quality
title_short	A review of water quality index models and their use for assessing surface water quality
title_full	A review of water quality index models and their use for assessing surface water quality
title_fullStr	A review of water quality index models and their use for assessing surface water quality
title_full_unstemmed	A review of water quality index models and their use for assessing surface water quality
title_sort	review of water quality index models and their use for assessing surface water quality
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/47b5e12a832c492da53427a74e2f147d
work_keys_str_mv	AT mdgalaluddin areviewofwaterqualityindexmodelsandtheiruseforassessingsurfacewaterquality AT stephennash areviewofwaterqualityindexmodelsandtheiruseforassessingsurfacewaterquality AT agnieszkaiolbert areviewofwaterqualityindexmodelsandtheiruseforassessingsurfacewaterquality AT mdgalaluddin reviewofwaterqualityindexmodelsandtheiruseforassessingsurfacewaterquality AT stephennash reviewofwaterqualityindexmodelsandtheiruseforassessingsurfacewaterquality AT agnieszkaiolbert reviewofwaterqualityindexmodelsandtheiruseforassessingsurfacewaterquality
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A review of water quality index models and their use for assessing surface water quality

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