干旱区生态环境知识资源中心(Arid): Soil loss through fissures and its responses to rainfall based on drip water monitoring in karst caves

Arid

DOI	10.1016/j.jhydrol.2022.129000
	Soil loss through fissures and its responses to rainfall based on drip water monitoring in karst caves
	He, Jianghu; Cao, Yang; Zhang, Keli; Xiao, Shizhen; Cao, Zihao
通讯作者	Zhang, KL
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2023
卷号	617
英文摘要	Owing to the binary geologic structure, soil loss in the karst region is characterized as a combination of surface erosion and underground soil loss. However, we know little about the process and amount of underground soil loss by now due to the difficulty in observation and identification. To predict soil loss accurately and control rocky desertification effectively, it is urgent to collect data of underground soil loss directly by new ways. In this study, 137Cs tracer technique, high frequency online monitoring and UAV survey were used to investigate soil loss through fissures. The soil samples were collected in five karst caves of Guizhou Province for determining 137Cs activity. In two of these caves, the improved monitoring devices were adopted to monitor drip water online, and the sediment content in drip water was measured once a month. Furthermore, depending on 5 exposed karst sections, the distribution density of fissures was surveyed with UAV to calculate the average underground soil loss modulus in the watershed. The results showed that (1) the soil materials deposited in caves were mainly transported by runoff from the cave entrance, rather than through fissures above the caves. (2) The initial response time and duration of drip water in caves to rainfall were controlled by surface land coverage and the process of precipitation. And the variation of sediment content in drip water kept almost constant with rainfall except at the beginning of the rainy season. (3) The directly measured underground soil loss rate monitored through the fissure above a cave with high bedrock exposure rate and a cave with high vegetation coverage was 2.42 g center dot yr- 1 and 0.36 g center dot yr- 1, respectively. (4) The average underground soil loss modulus in the area with high bedrock exposure rate and with high vegetation coverage was 0.35 t center dot km- 2 center dot yr- 1 and 0.05 t center dot km- 2 center dot yr- 1, respectively. This study is helpful for understanding the process and intensity of underground soil loss.
英文关键词	Underground soil loss Drip water Cave soil Sediment content Karst fissure 137Cs
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000923212100001
WOS关键词	ROCKY DESERTIFICATION ; EROSION ; CHINA ; SLOPES ; RUNOFF ; CATCHMENT ; REGIONS ; AQUIFER ; LEAKAGE ; IMPACT
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397385
推荐引用方式 GB/T 7714	He, Jianghu,Cao, Yang,Zhang, Keli,et al. Soil loss through fissures and its responses to rainfall based on drip water monitoring in karst caves[J],2023,617.
APA	He, Jianghu,Cao, Yang,Zhang, Keli,Xiao, Shizhen,&Cao, Zihao.(2023).Soil loss through fissures and its responses to rainfall based on drip water monitoring in karst caves.JOURNAL OF HYDROLOGY,617.
MLA	He, Jianghu,et al."Soil loss through fissures and its responses to rainfall based on drip water monitoring in karst caves".JOURNAL OF HYDROLOGY 617(2023).