Impact assessment of water diversion project on urban aquatic ecological environment

Water diversion project (WDP) plays an increasingly important role in improving the water quality of urban rivers along the Yangtze Delta megalopolis of China. However, their effects on the water ecological environment has generated extensive debates. Water quality variables and phytoplankton commun...

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Autores principales:	Yanqing Yang, Jianyun Zhang, Wenming Yan, Yi Zhang, Jie Wang, Guoqing Wang, Feng Yan
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	WDP Evaluation model Fuzzy variable theory Matrix norm Water quality Phytoplankton community Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/fcf88d083b594e6791fa6e958fb5c6b1
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spelling	oai:doaj.org-article:fcf88d083b594e6791fa6e958fb5c6b12021-12-01T04:47:22ZImpact assessment of water diversion project on urban aquatic ecological environment1470-160X10.1016/j.ecolind.2021.107496https://doaj.org/article/fcf88d083b594e6791fa6e958fb5c6b12021-06-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21001618https://doaj.org/toc/1470-160XWater diversion project (WDP) plays an increasingly important role in improving the water quality of urban rivers along the Yangtze Delta megalopolis of China. However, their effects on the water ecological environment has generated extensive debates. Water quality variables and phytoplankton community dynamics were tracked and monitored during the summer–winter water diversions to explore the comprehensive effects of WDP on the urban aquatic ecological environment. The multi-index comprehensive evaluation model (MCEM) was adopted for further quantitative assessment, together with a newly proposed progressive degree calculation model (PDCM), which broke the limitations of the traditional ways using Markov chains. The grade evaluation was based on the Environmental Quality Standards for Surface Water (GB 3838–2002) in China. The comprehensive water quality evaluated by MCEM was improved with the largest improvement of two grades after WDP in summer, which on the contrary was worsened because of water transfers in winter by a maximum decrement of one grade. The PDCM evaluation on water quality index indicated that WDP has improved the water quality to some extent but without grade changes. Also, the proportion of Cyanobacteria and Chlorophyta decreased in the phytoplankton community of the three rivers after WDP, whereas the proportion of Bacillariophyta increased, indicating that the community structure was more inclined to the Yangtze River. The comprehensive water pollution situation evaluated by MCEM was improved with the largest improvement from middle pollution to lower pollution (one grade) because of water transfers. The changes in aquatic biological indexes evaluated by PDCM were more obvious than those of water quality indexes, which were improved by one grade.Yanqing YangJianyun ZhangWenming YanYi ZhangJie WangGuoqing WangFeng YanElsevierarticleWDPEvaluation modelFuzzy variable theoryMatrix normWater qualityPhytoplankton communityEcologyQH540-549.5ENEcological Indicators, Vol 125, Iss , Pp 107496- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	WDP Evaluation model Fuzzy variable theory Matrix norm Water quality Phytoplankton community Ecology QH540-549.5
spellingShingle	WDP Evaluation model Fuzzy variable theory Matrix norm Water quality Phytoplankton community Ecology QH540-549.5 Yanqing Yang Jianyun Zhang Wenming Yan Yi Zhang Jie Wang Guoqing Wang Feng Yan Impact assessment of water diversion project on urban aquatic ecological environment
description	Water diversion project (WDP) plays an increasingly important role in improving the water quality of urban rivers along the Yangtze Delta megalopolis of China. However, their effects on the water ecological environment has generated extensive debates. Water quality variables and phytoplankton community dynamics were tracked and monitored during the summer–winter water diversions to explore the comprehensive effects of WDP on the urban aquatic ecological environment. The multi-index comprehensive evaluation model (MCEM) was adopted for further quantitative assessment, together with a newly proposed progressive degree calculation model (PDCM), which broke the limitations of the traditional ways using Markov chains. The grade evaluation was based on the Environmental Quality Standards for Surface Water (GB 3838–2002) in China. The comprehensive water quality evaluated by MCEM was improved with the largest improvement of two grades after WDP in summer, which on the contrary was worsened because of water transfers in winter by a maximum decrement of one grade. The PDCM evaluation on water quality index indicated that WDP has improved the water quality to some extent but without grade changes. Also, the proportion of Cyanobacteria and Chlorophyta decreased in the phytoplankton community of the three rivers after WDP, whereas the proportion of Bacillariophyta increased, indicating that the community structure was more inclined to the Yangtze River. The comprehensive water pollution situation evaluated by MCEM was improved with the largest improvement from middle pollution to lower pollution (one grade) because of water transfers. The changes in aquatic biological indexes evaluated by PDCM were more obvious than those of water quality indexes, which were improved by one grade.
format	article
author	Yanqing Yang Jianyun Zhang Wenming Yan Yi Zhang Jie Wang Guoqing Wang Feng Yan
author_facet	Yanqing Yang Jianyun Zhang Wenming Yan Yi Zhang Jie Wang Guoqing Wang Feng Yan
author_sort	Yanqing Yang
title	Impact assessment of water diversion project on urban aquatic ecological environment
title_short	Impact assessment of water diversion project on urban aquatic ecological environment
title_full	Impact assessment of water diversion project on urban aquatic ecological environment
title_fullStr	Impact assessment of water diversion project on urban aquatic ecological environment
title_full_unstemmed	Impact assessment of water diversion project on urban aquatic ecological environment
title_sort	impact assessment of water diversion project on urban aquatic ecological environment
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/fcf88d083b594e6791fa6e958fb5c6b1
work_keys_str_mv	AT yanqingyang impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment AT jianyunzhang impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment AT wenmingyan impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment AT yizhang impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment AT jiewang impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment AT guoqingwang impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment AT fengyan impactassessmentofwaterdiversionprojectonurbanaquaticecologicalenvironment
_version_	1718405801374121984

Impact assessment of water diversion project on urban aquatic ecological environment

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