干旱区生态环境知识资源中心(Arid): Spatiotemporal variation of hydrological connectivity and its threshold effects on flood dynamics: An examination in the arid and semi-arid regions, China

Arid

DOI	10.1016/j.scitotenv.2024.173406
	Spatiotemporal variation of hydrological connectivity and its threshold effects on flood dynamics: An examination in the arid and semi-arid regions, China
	Deng, Chun; Jiang, Xiaohui; Tan, Zhuting; Nie, Tong
通讯作者	Jiang, XH
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	935
英文摘要	Hydrological connectivity, a critical indicator of underlying surface changes, plays a pivotal role in the generation and evolution of floods. This study focuses on examining hydrological connectivity and its significant impact on flood dynamics. The Hekou-Longmen section (HL) is used as a case area because of its frequent flooding, which is typical of arid and semi -arid zone. By employing the modified hydrological connectivity index ( IC ), this study evaluated the hydrological connectivity and examined its spatiotemporal variation of the HL. Based on 1131 Annual Maximum Instantaneous Streamflow ( AMS ) data of 21 sub -basins in the HL, a panel threshold regression model was used to reveal threshold effect of IC on flood dynamics. The results showed that the annual mean IC showed a decreasing trend, with spatial variation dominated by significant decreases and no change. Furthermore, it was found that the magnitude of the effect of extreme precipitation ( EP ) on AMS increased with increasing IC thresholds. The threshold effect of EP on AMS were found to exist during the 1990s, 2000s, and 2010s, with thresholds of 2.84, 3.27, and 3.37, respectively. This research established a quantitative framework for comprehensively evaluating the impact of underlying surface changes on flood, providing important reference for the study of flood mechanisms in similar arid and semi -arid regions globally.
英文关键词	Floods Hydrological connectivity Threshold effects Panel threshold regression model The Hekou-Longmen section
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001245906900001
WOS关键词	SEDIMENT CONNECTIVITY ; LOESS PLATEAU ; RUNOFF ; COVER ; PRECIPITATION ; CATCHMENTS ; PROBABILITY ; TOPOGRAPHY ; IMPACTS ; AREAS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405504
推荐引用方式 GB/T 7714	Deng, Chun,Jiang, Xiaohui,Tan, Zhuting,et al. Spatiotemporal variation of hydrological connectivity and its threshold effects on flood dynamics: An examination in the arid and semi-arid regions, China[J],2024,935.
APA	Deng, Chun,Jiang, Xiaohui,Tan, Zhuting,&Nie, Tong.(2024).Spatiotemporal variation of hydrological connectivity and its threshold effects on flood dynamics: An examination in the arid and semi-arid regions, China.SCIENCE OF THE TOTAL ENVIRONMENT,935.
MLA	Deng, Chun,et al."Spatiotemporal variation of hydrological connectivity and its threshold effects on flood dynamics: An examination in the arid and semi-arid regions, China".SCIENCE OF THE TOTAL ENVIRONMENT 935(2024).