Assessment and Feature Analysis of Soil Erosion in Mountainous Area of Guangdong Province Based on USLE

WEN Ya; LIU Xiao-nan; CHENG Jiong

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Assessment and Feature Analysis of Soil Erosion in Mountainous Area of Guangdong Province Based on USLE

- Assessment and Feature Analysis of Soil Erosion in Mountainous Area of Guangdong Province Based on USLE
- Bulletin of Soiland Water Conservation Vol. 32, Issue 4, Pages: 112-118(2013)
- 作者机构：
  
  1. 中国科学院广州地球化学研究所,广东,广州,510640
  2. 中国科学院大学,北京,100039
  3. 华南农业大学,广东,广州,510642
  4. 广东省生态环境与土壤研究所,广东,广州,510650
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013
- 稿件说明：
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WEN Ya, LIU Xiao-nan, CHENG Jiong. Assessment and Feature Analysis of Soil Erosion in Mountainous Area of Guangdong Province Based on USLE[J]. Bulletin of Soiland Water Conservation, 2013, 32(4): 112-118.
DOI：

WEN Ya, LIU Xiao-nan, CHENG Jiong. Assessment and Feature Analysis of Soil Erosion in Mountainous Area of Guangdong Province Based on USLE[J]. Bulletin of Soiland Water Conservation, 2013, 32(4): 112-118. DOI：

摘要

基于通用土壤流失方程(universal soil loss equation

USLE)、遥感和ArcGIS空间分析技术

通过合理选择USLE模型中各土壤侵蚀因子的计算方法

对广东省山区土壤侵蚀量进行了估算

并对山区土壤侵蚀随土地利用类型、土壤类型、坡度及海拔高度的分布特征进行了分析。结果表明

广东省山区2000年土壤侵蚀总量为1.23×10

年均侵蚀模数为1 080t/(km

·a)

侵蚀强度为轻度。不同土地利用类型中

旱地的侵蚀强度最高

达2 055t/(km

·a)

林地和草地的侵蚀模数较小

分别为908和932t/(km

·a)。不同坡度等级的土壤侵蚀特征表现为坡度越陡

侵蚀强度越大。不同海拔高度的侵蚀特征表现为在0~1 600m高度

侵蚀强度随海拔高度的升高而增大;海拔高于1 600m时

侵蚀强度随海拔高度的升高而下降。

Abstract

Taking reasonable soil erosion factors from remote sensing and GIS spatial analysis

we estimated the soil erosion situation by universal soil loss equation(USLE)in mountain area of Guangdong Province. The spatial changes of soil erosion with laud use

soil type

slope degree and elevations also be analyzed in this paper.The results indicate that the annual average soil erosion amounted to 1.23×108 t with the mean soil erosion modulus of 1 080t/(km2·a)classified as slight degree erosion.Among different types of land use

the strongest soil erosion occurred in dry land with the erosion modulus of 2 055t/(km2·a)and the weakest erosion was in forest and grassland with the erosion modulus of 908and 932t/(km2·a)respectiely. And the soil erosion intensity increased with slope gradient

the greater of the slope gradient

the more intense of the soil erosion.In different elevation zones

the soil erosion intensity increases with the elevation until to 1 600meters

after which the erosion intensity decreased.

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