Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin

A perceptible degradation in water quality complicates safe water supply for drinking and irrigation purposes. Therefore, this study aims at monitoring water quality changes and effective factors in the Dez River Basin, which are required to manage water resources effectively. To this end, the commo...

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Autores principales:	Nariman Mahmoodi, Khaled Osati, Ali Salajegheh, Mohsen Mohseni Saravi
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	climate change dez river basin evaporation seasonal kendall water quality Public aspects of medicine RA1-1270
Acceso en línea:	https://doaj.org/article/c45bb26e3bb24c3cab8baa83689b1c08
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spelling	oai:doaj.org-article:c45bb26e3bb24c3cab8baa83689b1c082021-11-06T05:46:10ZTrend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin1477-89201996-782910.2166/wh.2020.123https://doaj.org/article/c45bb26e3bb24c3cab8baa83689b1c082021-02-01T00:00:00Zhttp://jwh.iwaponline.com/content/19/1/159https://doaj.org/toc/1477-8920https://doaj.org/toc/1996-7829A perceptible degradation in water quality complicates safe water supply for drinking and irrigation purposes. Therefore, this study aims at monitoring water quality changes and effective factors in the Dez River Basin, which are required to manage water resources effectively. To this end, the common influence of flow rate changes on water quality was separated by implementing seasonal Mann–Kendall test on residuals resulting from the LOWESS test. The results show that after adjusting the effects of seasonality and streamflow fluctuations, significant positive trends in most water quality parameters are still observed. It emphasizes the role of other factors controlling river water quality in the basin. Comparison of the trends of modified quality parameter time series (residuals) in different subbasins having natural or mad-made conditions, with or without significant groundwater resources, shows almost the same presented trends in water quality. This supports that, overall, minor changes occurred in land use, groundwater table, and environmental and human factors with no important influences on presented trends in water quality. Our analyses show that overall reduction in precipitation as well as positive trends in temperature and evaporation led to intensified streamflow variations, explaining the main changes in the river water quality of the basin.Nariman MahmoodiKhaled OsatiAli SalajeghehMohsen Mohseni SaraviIWA Publishingarticleclimate changedez river basinevaporationseasonal kendallwater qualityPublic aspects of medicineRA1-1270ENJournal of Water and Health, Vol 19, Iss 1, Pp 159-173 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	climate change dez river basin evaporation seasonal kendall water quality Public aspects of medicine RA1-1270
spellingShingle	climate change dez river basin evaporation seasonal kendall water quality Public aspects of medicine RA1-1270 Nariman Mahmoodi Khaled Osati Ali Salajegheh Mohsen Mohseni Saravi Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
description	A perceptible degradation in water quality complicates safe water supply for drinking and irrigation purposes. Therefore, this study aims at monitoring water quality changes and effective factors in the Dez River Basin, which are required to manage water resources effectively. To this end, the common influence of flow rate changes on water quality was separated by implementing seasonal Mann–Kendall test on residuals resulting from the LOWESS test. The results show that after adjusting the effects of seasonality and streamflow fluctuations, significant positive trends in most water quality parameters are still observed. It emphasizes the role of other factors controlling river water quality in the basin. Comparison of the trends of modified quality parameter time series (residuals) in different subbasins having natural or mad-made conditions, with or without significant groundwater resources, shows almost the same presented trends in water quality. This supports that, overall, minor changes occurred in land use, groundwater table, and environmental and human factors with no important influences on presented trends in water quality. Our analyses show that overall reduction in precipitation as well as positive trends in temperature and evaporation led to intensified streamflow variations, explaining the main changes in the river water quality of the basin.
format	article
author	Nariman Mahmoodi Khaled Osati Ali Salajegheh Mohsen Mohseni Saravi
author_facet	Nariman Mahmoodi Khaled Osati Ali Salajegheh Mohsen Mohseni Saravi
author_sort	Nariman Mahmoodi
title	Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
title_short	Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
title_full	Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
title_fullStr	Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
title_full_unstemmed	Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin
title_sort	trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the dez river basin
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/c45bb26e3bb24c3cab8baa83689b1c08
work_keys_str_mv	AT narimanmahmoodi trendinriverwaterqualitytrackingtheoverallimpactsofclimatechangeandhumanactivitiesonwaterqualityinthedezriverbasin AT khaledosati trendinriverwaterqualitytrackingtheoverallimpactsofclimatechangeandhumanactivitiesonwaterqualityinthedezriverbasin AT alisalajegheh trendinriverwaterqualitytrackingtheoverallimpactsofclimatechangeandhumanactivitiesonwaterqualityinthedezriverbasin AT mohsenmohsenisaravi trendinriverwaterqualitytrackingtheoverallimpactsofclimatechangeandhumanactivitiesonwaterqualityinthedezriverbasin
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Trend in river water quality: tracking the overall impacts of climate change and human activities on water quality in the Dez River Basin

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