干旱区生态环境知识资源中心(Arid): Creep leakage process of remaining soils in near-surface fissures in a karst area with bedrock outcrops

Arid

DOI	10.1016/j.catena.2022.106802
	Creep leakage process of remaining soils in near-surface fissures in a karst area with bedrock outcrops
	Cen, Longpei; Peng, Xudong; Dai, Quanhou; Li, Changlan; Yi, Xingsong
通讯作者	Peng, XD
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	221
英文摘要	As a global ecological environmental problem, rocky desertification is derived from the exposure of large areas of bare rock on slopes, and soil remains only between rock exposures and in fissures. These remaining soils are crucial to vegetation growth and the amelioration of rocky desertification, but they are prone to leakage loss. This study aimed to reveal soil creep displacement (SCD) and the characteristics, process and mechanism of soil particle leakage in fissures on sloping land in karst areas. Six fissures on the karst plateau of Guizhou were studied by paint marking and soil particle analysis techniques, and SCD was monitored during three rainfall periods (cumulative rainfall of 104.5, 151.2 and 332.7 mm). The results showed that for 104.5 mm of rainfall, the SCD of the fissures was 1.0 similar to 2.5 cm and accounted for more than 62.5% of the displacement observed after a total of 332.7 mm of precipitation. Additionally, the SCD was 0.2 similar to 0.3 cm at 181.5 mm of rainfall. Therefore, rainstorms or downpours are a key factor driving soil fissure leakage, and the leakage form is mainly soil creep. Under three rainfall observation periods, the particle content with different particle sizes at soil-rock interfaces and soils in six fissures showed that fissure soils do not show uniform downward leakage; instead, some particles in the soil layers or at soil-rock interfaces randomly leak to lower layers during the process of creep leakage loss. Hence, the occurrence of soil layers and particles is random, and the soil particles at the soil-rock interfaces and in soil layers in fissures may leak downward. The results indicate that soil creep leakage in fissures is a complex process that depends on both internal factors and external factors (such as rainfall).
英文关键词	Underground soil leakage Karst fissure Soil-rock interface Sloping land Karst plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000892273300001
WOS关键词	ROCKY DESERTIFICATION ; AGGREGATE STABILITY ; RAINFALL EROSIVITY ; BARE SLOPES ; LAND-USE ; EROSION ; RUNOFF ; BASIN ; ERODIBILITY ; FRAGMENTS
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/2XILL650/395661
推荐引用方式 GB/T 7714	Cen, Longpei,Peng, Xudong,Dai, Quanhou,et al. Creep leakage process of remaining soils in near-surface fissures in a karst area with bedrock outcrops[J],2023,221.
APA	Cen, Longpei,Peng, Xudong,Dai, Quanhou,Li, Changlan,&Yi, Xingsong.(2023).Creep leakage process of remaining soils in near-surface fissures in a karst area with bedrock outcrops.CATENA,221.
MLA	Cen, Longpei,et al."Creep leakage process of remaining soils in near-surface fissures in a karst area with bedrock outcrops".CATENA 221(2023).