黑河上中游流域梯级库区夏季重金属汇源解析

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Abstract To explore impacts of a cascade reservoir on the spatial distribution of heavy metals in rivers, we collected samples (including water, sediment and shoreside soil) from the trunk and tributaries of the upper and middle reaches of the Heihe River in August 2019 to determine the contents of Cr, Cu, Ni, Pb, Zn, Cd, Mn and As elements. The spatial distribution and sources of these heavy metals were analyzed through inverse distance weighting and principal component analysis. The result show that these elements were still in the "sink" stage in the middle and upper reaches. Damming for impoundment had the "interception effect" due to the different migration and release capacities of various heavy metals. A small portion of heavy metals was "intercepted" in the middle reservoir area and a significant enrichment in the trunk stream and its tributaries due to the hydraulic characteristics of their confluences. Furthermore, As, Cd, Pb, Zn and Cu were mainly resulted from mineral exploitation, while Mn, Cr and Ni from industrial production, urban sewage and natural factors, respectively. According to the horizontal characteristics of Cu concentration, sediments and soils on the shores indicated mineral exploitation near the sections. The findings could provide a reference to the control and effective management of heavy metals in the cascade damming reaches of China.

Key words： Heihe River heavy metals cascade reservoir distribution source

Received: 01 September 2022

PACS:

X171

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	Articles by authors
	WANG Yu
	ZHU Jia-le
	FENG Qi
	LIU Wei
	HE Yu-hua
	WANG Xu
	LIU Kai-qing

Cite this article:

WANG Yu,ZHU Jia-le,FENG Qi等. Distribution characteristics and aggregating and releasing of heavy metals during Summer in a cascade Reservoir of the upper and middle reaches of the Heihe River[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(4): 1895-1905.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I4/1895

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