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Spatio-temporal variation of heavy metals in fresh water after dam construction: a case study of the Manwan Reservoir, Lancang River

Zhao, Qinghe ; Liu, Shiliang ; Deng, Li ; Yang, Zhifeng ; Dong, Shikui ; Wang, Cong ; Zhang, Zhaoling

Environmental monitoring and assessment, 2012-07, Vol.184 (7), p.4253-4266 [Periódico revisado por pares]

Dordrecht: Springer Netherlands

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Título:
Spatio-temporal variation of heavy metals in fresh water after dam construction: a case study of the Manwan Reservoir, Lancang River
Autor: Zhao, Qinghe ; Liu, Shiliang ; Deng, Li ; Yang, Zhifeng ; Dong, Shikui ; Wang, Cong ; Zhang, Zhaoling
Assuntos: Analysis of variance ; Atmospheric Protection/Air Quality Control/Air Pollution ; Case studies ; China ; Chromium ; Construction ; Contamination ; Dam construction ; Dams ; Earth and Environmental Science ; Ecology ; Ecosystems ; Ecotoxicology ; Enrichment ; Environment ; Environmental economics ; Environmental Management ; Environmental Monitoring ; Fresh water ; Freshwater ; Heavy metals ; Hydroelectric power ; Manganese ; Metals ; Metals, Heavy - analysis ; Monitoring/Environmental Analysis ; Principal Component Analysis ; Principal components analysis ; Reservoirs ; River ecology ; Rivers - chemistry ; Seasons ; Studies ; Surface water ; Water Pollutants, Chemical - analysis ; Water Pollution, Chemical - statistics & numerical data ; Water temperature
É parte de: Environmental monitoring and assessment, 2012-07, Vol.184 (7), p.4253-4266
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: This study investigated temporal heavy metal characteristics over the past 20 years and the spatial variation of heavy metal characteristics at the Manwan Reservoir tail, center, and head in the Lancang River, Yunnan Province, China. The following heavy metals were selected for analysis: Hg, Cd, Pb, Cu, Zn, As, Cr, Fe, and Mn. Multivariate statistical methods, including principal component analysis (PCA) and the Pearson correlation matrix were used to distinguish the main pollution factors and sources before and after dam construction. The results indicate that the average annual values of heavy metals were far lower than the recommended values of the surface water quality standards in China with the exception of Hg. The concentration of metals showed considerable variation by season, where higher levels of metals generally occurred in high flow periods. The results from PCA show that three significant components were extracted, explaining 76.25% of the total variance. The ANOVA results indicate that Pb, Fe, Mn, and Cr had significant spatial variation ( P < 0.05) at the reservoir tail, center and head. The enrichment factor (EF) used to compare the accumulation effect of heavy metals indicated that there was no enrichment (EF < 1) of heavy metals with the exception of Mn, which showed minor enrichment (1 < EF < 3) between the reservoir center and head. The spatiotemporal variation and the accumulation effects of water heavy metals were not distinct due to the construction of the Manwan Reservoir.
Editor: Dordrecht: Springer Netherlands
Idioma: Inglês

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Spatio-temporal variation of heavy metals in fresh water after dam construction: a case study of the Manwan Reservoir, Lancang River

Zhao, Qinghe ; Liu, Shiliang ; Deng, Li ; Yang, Zhifeng ; Dong, Shikui ; Wang, Cong ; Zhang, Zhaoling

Dordrecht: Springer Netherlands

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