干旱区生态环境知识资源中心(Arid): Exploring the Influences of Stream Network Structure and Connectivity on Water Environment Risk in China

Arid

DOI	10.3390/w14244007
	Exploring the Influences of Stream Network Structure and Connectivity on Water Environment Risk in China
	Chen, Menghan; Xu, Zhicheng; Cheng, Lei; Hou, Qinyao; Liu, Pan; Qin, Shujing
通讯作者	Cheng, L
来源期刊	WATER
EISSN	2073-4441
出版年	2022
卷号	14 期号:24
英文摘要	Stream networks are the transportation channels of pollutants that can significantly influence water environment risk (WER). However, the influences of stream network structure and connectivity (SC) on WER at the national scale and its regional variability have been rarely investigated in China. In this study, the WER was assessed from the grey water footprint of nitrogen and phosphorus in 214 catchments in China. The relationship between WER and SC and its regional variability were analyzed using correlation and grey relational analysis. Results showed that the water environment risk index (RI) in some catchments located in the Hai and Liao River Basins was the highest in China (RI > 0.8). On national scale, longitudinal connectivity (C-l) and cyclical connectivity (C-c) had the strongest influences on WER with grey relational degree index (GRAI) of 0.68 and 0.67, respectively. The average slope (S-r) was the most important in humid zones, whereas C-l and water surface ratio (R-w) had a stronger influence in arid zones. In zones with intensive human activities, C-c, river density (R-d), and the node connection ratio (R-nc) mostly affected WER. The main influenced factors varied significantly among nationwide and different zones, which indicated that climate and human activities played an important role in the spatial variation of the relationship between WER and SC. This study highlights the important role of SC on WER and that the relationship between WER and SC varies with climate and human activities.
英文关键词	water environment risk stream network structure and connectivity regional variability climate human activity intensity grey relational analysis
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000903187300001
WOS关键词	HUAI RIVER-BASIN ; TAIHU LAKE BASIN ; LAND-USE ; ANTHROPOGENIC NITROGEN ; POLLUTION SOURCES ; SPATIAL VARIATION ; SURFACE-WATER ; YANGTZE-RIVER ; QUALITY ; RESOURCES
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394868
推荐引用方式 GB/T 7714	Chen, Menghan,Xu, Zhicheng,Cheng, Lei,et al. Exploring the Influences of Stream Network Structure and Connectivity on Water Environment Risk in China[J],2022,14(24).
APA	Chen, Menghan,Xu, Zhicheng,Cheng, Lei,Hou, Qinyao,Liu, Pan,&Qin, Shujing.(2022).Exploring the Influences of Stream Network Structure and Connectivity on Water Environment Risk in China.WATER,14(24).
MLA	Chen, Menghan,et al."Exploring the Influences of Stream Network Structure and Connectivity on Water Environment Risk in China".WATER 14.24(2022).