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Title of Journal: J Mt Sci

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Abbravation: Journal of Mountain Science

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Science Press

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DOI

10.1002/adma.201104361

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1993-0321

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Uncertainty of slope length derived from digital e

Authors: Shijie Zhu Guoan Tang Liyang Xiong Gang Zhang
Publish Date: 2014/09/18
Volume: 11, Issue: 5, Pages: 1169-1181
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Abstract

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 5m 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


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  2. Impact of earthquake-induced landslide on the habitat suitability of giant panda in Wolong, China
  3. The optimal cross-section design of the “Trapezoid-V” shaped drainage canal of viscous debris flow
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  10. Monitoring glacier and supra-glacier lakes from space in Mt. Qomolangma region of the Himalayas on the Tibetan Plateau in China
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  13. Characteristics of viscous debris flow in a drainage channel with an energy dissipation structure
  14. Experimental investigation on the relevance of mechanical properties and porosity of sandstone after hydrochemical erosion
  15. Relief degree of land surface and population distribution of mountainous areas in China
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  17. Non-point-source nitrogen and phosphorus loadings from a small watershed in the Three Gorges Reservoir area
  18. Temporal variations in carbon stock of Pinus roxburghii Sargent forests of Himachal Pradesh, India
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