干旱区生态环境知识资源中心(Arid): Assessment of soil redistribution in a typical karst catchment using 137Cs

Arid

DOI	10.1016/j.jenvrad.2022.107087
	Assessment of soil redistribution in a typical karst catchment using 137Cs
	Li, Yuan; Li, Kaiping; Cai, Lulu; Zhu, Dayun; Liu, Ziqi; Wei, Xingyu
通讯作者	Li, Y
来源期刊	JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
ISSN	0265-931X
EISSN	1879-1700
出版年	2023
卷号	257
英文摘要	An effective assessment of soil erosion and redistribution is a prerequisite for soil erosion control and is critical to achieving sustainable development goals. The most typical landscape in the karst region of Southwest China is found in the peak-cluster depression area, but little attention has been given to the soil redistribution here. A typical karst peak-cluster depression catchment water area in Southwest China was selected, and Cs-137 technology was used to evaluate the soil redistribution rate and soil erosion process along a total transect (hillslope, depression and sinkhole) in the catchment. The results showed that the distribution of Cs-137 had a high spatial variability on the total transect of the catchment (CV = 60.04%), the middle slope was the most severely eroded (highest erosion rate of 13.49 t ha(-1) yr(-1)), and the area between the bottom slope and the depression was the primary sedimentary area on the surface in the catchment. The distribution of soil properties on the hillslope was affected by the process of soil redistribution. According to the distribution of the Cs-137 soil profile, the soil profile of the hillslope was uniform, and signs of historical tillage activities were evident; the historical tillage activities of depressions were in the range of 0-20 cm depth, while the Cs-137 in the sinkhole was mostly distributed in the shallow layers and decreased exponentially with depth, reflecting the depositional characteristics of noncultivated soil. In addition, this study found evidence of underground soil loss in sinkholes since the 1960s; the shallow sediment of these sinkholes mainly came from depressions, with an average deposition rate of 11.77 t ha(-1) yr(-1). Human disturbance and land-use change controlled recent changes in soil redistribution. The soil erosion rate of the hillslopes in catchments was extremely low (average erosion rate of 1.92 t ha(-1) yr(-1)). The rocky desertification of hillslopes occurred before 1960; it was not a short-term contemporary process that occurred only during recent decades. This study showed that underground soil loss mainly occurred through sinkholes for a short period of time (100 years). These research results are of great significance for understanding the evolution of rocky desertification and the process of soil erosion.
英文关键词	Cs-137 Soil redistribution Soil erosion Karst Catchment
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000896962700002
WOS关键词	EROSION RATES ; LAND-USE ; RAINFALL EROSIVITY ; MAGNETIC MEASURES ; SEDIMENT SOURCES ; SOUTHWEST CHINA ; FALLOUT CS-137 ; ORGANIC-MATTER ; CESIUM-137 ; VARIABILITY
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/2XILL650/397307
推荐引用方式 GB/T 7714	Li, Yuan,Li, Kaiping,Cai, Lulu,et al. Assessment of soil redistribution in a typical karst catchment using 137Cs[J],2023,257.
APA	Li, Yuan,Li, Kaiping,Cai, Lulu,Zhu, Dayun,Liu, Ziqi,&Wei, Xingyu.(2023).Assessment of soil redistribution in a typical karst catchment using 137Cs.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,257.
MLA	Li, Yuan,et al."Assessment of soil redistribution in a typical karst catchment using 137Cs".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 257(2023).