干旱区生态环境知识资源中心(Arid): Combining Cs-137 with GeoWEPP Model to Study Short-term Soil Erosion on Slopes in Karst Areas in Southwestern China

Arid

DOI	10.18494/SAM.2021.3418
	Combining Cs-137 with GeoWEPP Model to Study Short-term Soil Erosion on Slopes in Karst Areas in Southwestern China
	Yin, Chuan; Xiong, Kai; Ji, Hongbing; Du, Mingyi
通讯作者	Ji, HB (corresponding author)，Univ Sci & Technol Beijing, Beijing 100083, Peoples R China.
来源期刊	SENSORS AND MATERIALS
ISSN	0914-4935
出版年	2021
卷号	33 期号:12
英文摘要	The geological and geomorphic environment is complex in karst areas in southwest China, which has seriously hampered the study of soil erosion in these areas. For this reason, the Cs-137 tracer method, remote sensing, and Geographic Information System (GIS) technology based on high-precision digital elevation model (DEM) data are used to estimate the soil erosion rate from a point to the surface and for the comprehensive evaluation of the spatial distribution and erosion mechanism of soil erosion on a karst slope. The average Cs-137 areal activity of nine sampling sites reached 875 Bq/m(2) (background value of 960 Bq/m(2)), the uncultivated land profile of Cs-137 was obtained in the topsoil layer of 0-6 cm, and the cultivated land profile of Cs-137 was obtained in the topsoil layer of 0-20 cm. The soil erosion intensity in the investigation area was dominated by micro-degree and moderate erosion, and the average soil erosion modulus of uncultivated land was higher than that of cultivated land. The intensity of soil erosion at the slope top was lowest and increased continuously along the slope direction on a hillslope with a short slope and a steep gradient, whereas for a hillslope with a long slope and a low gradient, soil was easily deposited at the slope toe. The area ratio of the slope gradient range of 17-23 degrees was 31.9%, the erosion ratio was 32.2%, and the deposition ratio was 32.9%. On the uncultivated land, the erosion prediction results of the geo-spatial interface for the Water Erosion Prediction Project (GeoWEPP) model were consistent with the estimation results of the Cs-137 moving boundary model, but on the cultivated land, the erosion prediction results of the former were larger than those of the latter. Overall, the methodology combining Cs-137 and GeoWEPP is favorable for monitoring and assessing regional soil erosion in uncultivated land of a moderately rocky desertification area, but for cultivated land, GeoWEPP gives relatively poor results and must be improved and optimized.
英文关键词	Cs-137 GeoWEPP soil erosion karst
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000737427700001
WOS关键词	RATES ; WEPP
WOS类目	Instruments & Instrumentation ; Materials Science, Multidisciplinary
WOS研究方向	Instruments & Instrumentation ; Materials Science
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376027
作者单位	[Yin, Chuan; Du, Mingyi] Beijing Univ Civil Engn & Architecture, Sch Geomat & Urban Spatial Informat, Beijing 102616, Peoples R China; [Xiong, Kai] Beijing Municipal Res Inst Environm Protect, Beijing 100037, Peoples R China; [Ji, Hongbing] Univ Sci & Technol Beijing, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Yin, Chuan,Xiong, Kai,Ji, Hongbing,et al. Combining Cs-137 with GeoWEPP Model to Study Short-term Soil Erosion on Slopes in Karst Areas in Southwestern China[J],2021,33(12).
APA	Yin, Chuan,Xiong, Kai,Ji, Hongbing,&Du, Mingyi.(2021).Combining Cs-137 with GeoWEPP Model to Study Short-term Soil Erosion on Slopes in Karst Areas in Southwestern China.SENSORS AND MATERIALS,33(12).
MLA	Yin, Chuan,et al."Combining Cs-137 with GeoWEPP Model to Study Short-term Soil Erosion on Slopes in Karst Areas in Southwestern China".SENSORS AND MATERIALS 33.12(2021).