Quantitative Study of Soil Erosion on the Longdong Loess Plateau Using GIS and RS——A Case Study of the Qingcheng Project Area

OUYANG Xue-zhi; PAN Jing-hu

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Quantitative Study of Soil Erosion on the Longdong Loess Plateau Using GIS and RS——A Case Study of the Qingcheng Project Area

- Quantitative Study of Soil Erosion on the Longdong Loess Plateau Using GIS and RS——A Case Study of the Qingcheng Project Area
- Bulletin of Soiland Water Conservation Vol. 25, Issue 5, Pages: 75-78(2006)
- 作者机构：
  
  1. 甘肃省水土保持科学研究所,甘肃,兰州,730000
  2. 西北师范大学地理与环境科学学院,甘肃,兰州,730070
- 作者简介：
- 基金信息：
- DOI：
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- Published：2006
- 稿件说明：
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OUYANG Xue-zhi, PAN Jing-hu. Quantitative Study of Soil Erosion on the Longdong Loess Plateau Using GIS and RS——A Case Study of the Qingcheng Project Area[J]. Bulletin of Soiland Water Conservation, 2006, 25(5): 75-78.
DOI：

OUYANG Xue-zhi, PAN Jing-hu. Quantitative Study of Soil Erosion on the Longdong Loess Plateau Using GIS and RS——A Case Study of the Qingcheng Project Area[J]. Bulletin of Soiland Water Conservation, 2006, 25(5): 75-78. DOI：

摘要

基于SPOT和TM融合遥感影像和GIS技术，采用通用土壤流失方程RUSLE作为评价模型，计算了庆城项目区土壤侵蚀量，并结合土壤侵蚀强度分级标准，生成流域土壤侵蚀强度等级图。结果表明，项目区年平均输沙模数为7058 t/km

，侵蚀级别属强度。研究区62．2％的泥沙来自于占流域面积仅24．8％的极强度和剧烈侵蚀区域。经分析，项目区25°以上的坡度土壤平均侵蚀量大于10168t/km

，是水土流失治理的关键。

Abstract

The amount of soil erosion in the Qingcheng project area was predicted using remote sensing(RS) images

Geographical information system(GIS) technology and the revised universal soil loss equation (RUSLE). The annual average amount of soil erosion in the Qingeheng project area was estimated to be about 7 058 t/km2

belonging to intense erosion.Soil erosion degree map was obtained through soil erosion degree classification.The seriously eroded area(greater than 10 000 t/km2) accounted for 24.8 % of the total area

but contributed 62.2 % of sediment of the whole watershed.The amount of soil loss on the land greater than 25 degree of slope was greater than 10 168 t/km2.Therefore

control of soil loss on the land is the key to the solution of soil erosion in the area. The method of soil erosion investigation will provide quick

quantitative and scientific data for strategies of both soil erosion prevention and soil protection.

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