A Study of Potential Factor for Water Erosion on Loess Hillslope Based on DEMs

LIU Ren-jie; ZHU Hong-chun; TANG Guo-an; XIE Yi-qun; ZENG Rui-an

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A Study of Potential Factor for Water Erosion on Loess Hillslope Based on DEMs

- A Study of Potential Factor for Water Erosion on Loess Hillslope Based on DEMs
- Bulletin of Soiland Water Conservation Vol. 31, Issue 5, Pages: 161-165(2012)
- 作者机构：
  
  1. 南京师范大学地理科学学院,江苏,南京,210046
  2. 山东科技大学测绘科学与工程学院,山东,青岛,266590
- 作者简介：
- 基金信息：
- DOI：
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- Published：2012
- 稿件说明：
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LIU Ren-jie, ZHU Hong-chun, TANG Guo-an, et al. A Study of Potential Factor for Water Erosion on Loess Hillslope Based on DEMs[J]. Bulletin of Soiland Water Conservation, 2012, 31(5): 161-165.
DOI：

LIU Ren-jie, ZHU Hong-chun, TANG Guo-an, et al. A Study of Potential Factor for Water Erosion on Loess Hillslope Based on DEMs[J]. Bulletin of Soiland Water Conservation, 2012, 31(5): 161-165. DOI：

摘要

坡面径流对地表的侵蚀

本质上是由于流水重力势能累积作用的结果。从坡面流水的能量累积角度

提出了一种反映原始坡面侵蚀动力的流水侵蚀潜能因子的基本概念及其计算原理;设计了基于高精度数字高程模型(DEM)的流水侵蚀潜能因子的计算方法

完成了多期模拟小流域的流水侵蚀潜能因子的计算

并基于该因子获取了相应的侵蚀动力点结果;分析了侵蚀动力点的空间分布特征

并以此为依据

初步讨论了地形的演化规律。结果表明

运用坡面流水侵蚀潜能因子进行坡面侵蚀强度及其演化规律的研究

具有重要的理论意义和实际的应用价值。

Abstract

The earth's surface erosion by runoff is essentially a result from gravitational potential energy of running water.Started with energy accumulation of slope running water

basic concepts and computational principles of the potential factor for running water erosion reflecting erosive power of original slope were presented.Algorithm of the computation for the potential factor was designed based on the high precision DEM

computation of the potential factor was completed for a simulated multiphase watershed

and the re-sult corresponding to erodent power points was acquired based on the potential factor. The spatial distribu-tion characteristics of erosive power points were analyzed and then

some preliminary discussions on the evo-lution of topography were made.Results showed that the research on slope erosion degree and its evolution in use of the potential factor is of theoretical significance and practical value.

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Related Institution

Department of Urban and Resource Science, Northwest University, Xian

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, College of Natural Resource and Environment, Northwest A&F University, Yangling

Institute of Soil and Water Conservation, Northwest A & F University, Yangling

College of Resources and Environment, Shanxi Agricultural University, Taigu

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