干旱区生态环境知识资源中心(Arid): Runoff sediment characteristics affected by erosive rainfall patterns in a small watershed in karst areas of southwest China

Arid

DOI	10.1016/j.catena.2022.106591
	Runoff sediment characteristics affected by erosive rainfall patterns in a small watershed in karst areas of southwest China
	Yang, Pingping; Li, Rui; Gu, Zaike; Qin, Li; Song, Tao; Liu, Zhongxian; Gao, Jiayong; Yuan, Jiang
通讯作者	Li, R
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	219
英文摘要	Few studies have focused on observing long-term localized runoff and sediment yield at a small watershed scale in karst areas in southwest China. In addition, the study of soil erosion mechanisms have also been unsatisfactory. Using hydrological data from 2014 to 2019, this study investigated the rainfall, runoff, and sediment yields in the Mahuangtian small watershed, where covered an area of 2.26 km(2). The results showed mean values of 124 t/(km(2).a) and 13.8 mm for the sediment modulus and runoff depth, respectively. Using the K-medoids clustering method, 112 erosive rainfall events were classified into three types of rainfall patterns based on duration (T-R), rainfall depth (R), and maximum 30-minute rainfall intensity (I-30). Pattern A was characterized by the shortest TR, lowest R, and highest I30; pattern B was characterized by medium T-R, R, and I-30; and pattern C was characterized by the longest T-R, highest R, and lowest I-30. Pattern B caused the largest runoff and sediment yield in the watershed, implying that further attention should be focused on this rainfall pattern to control soil and water loss. In addition, hysteretic loop analyses of suspended sediment concentration and flood discharge suggest that complex and clockwise loops were dominant for all events. This study found that the deposition stored in the subterranean river was the main source of sediment for the watershed. The results of this study provide useful information regarding the relationship between rainfall and runoff sediment in a small karst watershed and advance research on soil erosion mechanisms in karst areas.
英文关键词	Karst Sediment yield Runoff Rainfall pattern Hysteresis loops
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000855189000003
WOS关键词	SOIL-EROSION ; ROCKY DESERTIFICATION ; LAND-USE ; BASIN ; DEPRESSION ; CATCHMENT ; DYNAMICS ; IMPACT ; RATES ; HYSTERESIS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392118
推荐引用方式 GB/T 7714	Yang, Pingping,Li, Rui,Gu, Zaike,et al. Runoff sediment characteristics affected by erosive rainfall patterns in a small watershed in karst areas of southwest China[J],2022,219.
APA	Yang, Pingping.,Li, Rui.,Gu, Zaike.,Qin, Li.,Song, Tao.,...&Yuan, Jiang.(2022).Runoff sediment characteristics affected by erosive rainfall patterns in a small watershed in karst areas of southwest China.CATENA,219.
MLA	Yang, Pingping,et al."Runoff sediment characteristics affected by erosive rainfall patterns in a small watershed in karst areas of southwest China".CATENA 219(2022).