Uncertainty of Slope Length Derived from Digital Elevation Models of the Loess Plateau, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2014 > Vol11 No.5

	Uncertainty of Slope Length Derived from Digital Elevation Models of the Loess Plateau, China
	ZHU Shi-jie ; TANG Guo-an ; XIONG Li-yang ; ZHANG Gang
刊名	Journal of Mountain Science
	2014-09
卷号	11 期号:5 页码:1169-1181
关键词	Slope length Uncertainty Digital Elevation Models (DEM) Loess terrain
通讯作者	TANG Guo-an
英文摘要	Although many studies have investigated slope gradient uncertainty derived from Digital Elevation Models (DEMs), the research concerning slope length uncertainty is far from mature. This discrepancy affects the availability and accuracy of soil erosion as well as hydrological modeling. This study investigates the formation and distribution of existing errors and uncertainties in slope length derivation based on 5-m resolution DEMs of the Loess Plateau in the middle of China. The slope length accuracy in three different landform areas is examined to analyse algorithm effects. The experiments indicate that the accuracy of the flat test area is lower than that of the rougher areas. The value from the specific contributing area (SCA) method is greater than the cumulative slope length (CSL), and the differences between these two methods arise from the shape of the upslope area. The variation of mean slope length derived from various DEM resolutions and landforms. The slope length accuracy decreases with increasing grid size and terrain complexity at the six test sites. A regression model is built to express the relationship of mean slope length with DEM resolution less than 85 m and terrain complexity represented by gully density. The results support the understanding of the slope length accuracy, thereby aiding in the effective evaluation of the modeling effect of surface process.
收录类别	SCI
公开日期	2014-09-17
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/7246]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2014_Vol11 No.5
推荐引用方式 GB/T 7714	ZHU Shi-jie,TANG Guo-an,XIONG Li-yang,et al. Uncertainty of Slope Length Derived from Digital Elevation Models of the Loess Plateau, China[J]. Journal of Mountain Science,2014,11(5):1169-1181.
APA	ZHU Shi-jie,TANG Guo-an,XIONG Li-yang,&ZHANG Gang.(2014).Uncertainty of Slope Length Derived from Digital Elevation Models of the Loess Plateau, China.Journal of Mountain Science,11(5),1169-1181.
MLA	ZHU Shi-jie,et al."Uncertainty of Slope Length Derived from Digital Elevation Models of the Loess Plateau, China".Journal of Mountain Science 11.5(2014):1169-1181.