气候变化领域集成服务门户(CCPortal): Application of source-sink theory and MCR model to assess hydrochemical change risk in Lhasa River basin, Tibet, China

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DOI	10.1016/j.eiar.2023.107124
	Application of source-sink theory and MCR model to assess hydrochemical change risk in Lhasa River basin, Tibet, China
	Mao, Guozhu; Duan, Xingxing; Niu, Ziniu; Xu, Jiping; Xiao, Xiao; Huang, Xiang; Chen, Hulin; Mehr, Faryal; Moti, Rijal; Qiao, Zhi
发表日期	2023
ISSN	0195-9255
EISSN	1873-6432
卷号	101
英文摘要	The Lhasa River, one of the tributaries of the Yarlung Zangbo River on the Tibetan Plateau, provides water for the vast majority of residents in Tibet. The main purpose of this study is to identify regional environmental risk factors that may be affecting the Lhasa River basin. The minimum cumulative resistance (MCR) model was used to determine the source-sink risk pattern of the Lhasa River by identifying the sources of metal ions and trace elements in the basin. The results show that loss of soil ions, climate conditions and environmental factors contribute to the hydrochemical characteristics of the Lhasa River basin. The distribution of soil type greatly overlaps with the likelihood of soil ions loss. The low-risk and high-risk zones mainly consist of calcic soils and litho soils, respectively. In terms of the climate and environmental risk factors, rainfall erosivity poses the greatest risk during the low-flow season, vegetation coverage during the high-flow season, and freeze-thaw erosivity during the normal-flow season. High-risk sources and low-risk sources were identified by the MCR model. The high-risk sources were the vegetated and unused lands, which are vulnerable to weathering of Ca and Mg rich sedimentary and mixed rocks, while low-risk sources were the urban, construction, industrial and mining areas and forest land. This study can contribute to the development of policies for the sustainable management of water resources and the protection of the water environment in the Lhasa River Basin.
关键词	Hydrochemistry Source-sink Risk analysis Minimum cumulative resistance Lhasa River basin
英文关键词	LAND-USE CHANGE; WATER-QUALITY; SPATIAL-DISTRIBUTION; SURFACE-WATER; PATTERNS; PLATEAU; GROUNDWATER; IMPACT; AREA
WOS研究方向	Environmental Studies
WOS记录号	WOS:000988609300001
来源期刊	ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283140
作者单位	Tianjin University; University of Melbourne; Tibet University; Tribhuvan University
推荐引用方式 GB/T 7714	Mao, Guozhu,Duan, Xingxing,Niu, Ziniu,et al. Application of source-sink theory and MCR model to assess hydrochemical change risk in Lhasa River basin, Tibet, China[J],2023,101.
APA	Mao, Guozhu.,Duan, Xingxing.,Niu, Ziniu.,Xu, Jiping.,Xiao, Xiao.,...&Qiao, Zhi.(2023).Application of source-sink theory and MCR model to assess hydrochemical change risk in Lhasa River basin, Tibet, China.ENVIRONMENTAL IMPACT ASSESSMENT REVIEW,101.
MLA	Mao, Guozhu,et al."Application of source-sink theory and MCR model to assess hydrochemical change risk in Lhasa River basin, Tibet, China".ENVIRONMENTAL IMPACT ASSESSMENT REVIEW 101(2023).