干旱区生态环境知识资源中心(Arid): Coupling Changes in Runoff and Sediment and Their Relationships with Erosion Energy and Underlying Surface in the Wuding River Basin, China

Arid

DOI	10.3390/land13040496
	Coupling Changes in Runoff and Sediment and Their Relationships with Erosion Energy and Underlying Surface in the Wuding River Basin, China
	Yang, Qiannan; Gao, Haidong; Han, Yong; Li, Zhanbin; Lu, Kexin
通讯作者	Gao, HD
来源期刊	LAND
EISSN	2073-445X
出版年	2024
卷号	13 期号:4
英文摘要	Investigating the changes in the runoff and sediment coupling relationship in the Middle Yellow River Basin of China can not only deepen the understanding of soil loss control in arid areas, but also help solve key issues of regional ecological protection. Since the 1960s, soil- and water-conservation projects have been implemented in the Middle Yellow River Basin, inducing a significant reduction in runoff and sediment and changes in the relationship between runoff and sediment. The study identified the change points of coupling relationship between runoff and sediment in the Wuding River Basin (WRB) by constructing a diagnostic method based on coupling coordination degree and the Pettitt test; the study validated this using the Copula function and analyzed the impacts of erosion energy and underlying surface factors. The results showed the following: (1) the method based on coupling coordination degree and the Pettit test could accurately reflect the coupling relationship of runoff and sediment and identify two change points (1971 and 1996); (2) runoff and sediment in the WRB decreased gradually over three periods (P1, 1960-1970; P2, 1971-1995; P3, 1996-2020), with an average annual runoff of 15.34 x 108, 10.72 x 108, and 8.32 x 108 m3 and average annual sediment load of 1.84 x 108, 0.82 x 108, and 0.32 x 108 t, respectively; (3) the maximum possible joint design value of runoff and sediment under different return periods in P1 were all the highest, followed by P2 and P3, and the larger the return period, the higher the maximum possible joint design value; (4) runoff erosion power could promote runoff and sediment in PE (1960-2020), P1, P2 and P3 at a significant level, check dams and terrace could decrease runoff and sediment significantly in PE, and the highest contribution to runoff reduction was check dam (95.4%), while the highest contribution to sediment reduction was REP (93.8%). The study can provide a new way to analyze the changes in the runoff and sediment relationship and provide scientific support for runoff and sediment regulation in the Middle Yellow River Basin.
英文关键词	runoff sediment load copula function runoff erosion power underlying surface
类型	Article
语种	英语
开放获取类型	gold
收录类别	SSCI
WOS记录号	WOS:001210262400001
WOS关键词	LOESS PLATEAU ; CHECK DAMS ; HYDROLOGICAL PROCESSES ; TRANSPORT CAPACITY ; SOIL-EROSION ; LAND-COVER ; STREAMFLOW ; CLIMATE ; IMPACT ; YIELD
WOS类目	Environmental Studies
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/2XILL650/404792
推荐引用方式 GB/T 7714	Yang, Qiannan,Gao, Haidong,Han, Yong,et al. Coupling Changes in Runoff and Sediment and Their Relationships with Erosion Energy and Underlying Surface in the Wuding River Basin, China[J],2024,13(4).
APA	Yang, Qiannan,Gao, Haidong,Han, Yong,Li, Zhanbin,&Lu, Kexin.(2024).Coupling Changes in Runoff and Sediment and Their Relationships with Erosion Energy and Underlying Surface in the Wuding River Basin, China.LAND,13(4).
MLA	Yang, Qiannan,et al."Coupling Changes in Runoff and Sediment and Their Relationships with Erosion Energy and Underlying Surface in the Wuding River Basin, China".LAND 13.4(2024).