Changes of Soil Erosion Sensitivity by Returning Farmland to Forest Project in Mudanjiang City

GAO Fengjie; ZHANG Bai; WANG Zongming; LEI Guoping; SONG Ge; NING Jing

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Changes of Soil Erosion Sensitivity by Returning Farmland to Forest Project in Mudanjiang City

- Changes of Soil Erosion Sensitivity by Returning Farmland to Forest Project in Mudanjiang City
- Bulletin of Soiland Water Conservation Vol. 29, Issue 5, Pages: 1-6(2010)
- 作者机构：
  
  1. 中国科学院东北地理与农业生态研究所,吉林,长春,130012
  2. 中国科学院研究生院,北京,100039
  3. 东北农业大学资源与环境学院,黑龙江,哈尔滨,150030
- 作者简介：
- 基金信息：
- DOI：
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- Published：2010
- 稿件说明：
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GAO Fengjie, ZHANG Bai, WANG Zongming, et al. Changes of Soil Erosion Sensitivity by Returning Farmland to Forest Project in Mudanjiang City[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 1-6.
DOI：

GAO Fengjie, ZHANG Bai, WANG Zongming, et al. Changes of Soil Erosion Sensitivity by Returning Farmland to Forest Project in Mudanjiang City[J]. Bulletin of Soiland Water Conservation, 2010, 29(5): 1-6. DOI：

摘要

根据通用水土流失方程

选取降雨侵蚀力、土壤可蚀性、地形起伏度、植被覆盖4个自然因子

在遥感和GIS技术支持下完成了牡丹江地区退耕还林前后土壤侵蚀敏感性评价。研究结果表明

(1)研究区土壤侵蚀以轻度敏感和中度敏感为主

退耕还林前后二者面积比例分别为39.61%与29.04%和37.79%与34.03%。(2)在空间分布上

南部地区以不敏感和轻度敏感为主

且退耕后

西南部不敏感面积增加;北部地区以中度敏感为主

退耕前中度敏感、高度敏感和极敏感呈相互镶嵌的格局

退耕后三者的分布呈较强的规律性。(3)退耕前

土壤可蚀性对土壤侵蚀的作用很强

降雨侵蚀力作用一般

但退耕后

特别是极敏感区土壤可蚀性作用大大降低

而降雨侵蚀力作用则明显增强。总体而言

退耕还林使区域土壤侵蚀敏感性有所改善

但在高度敏感和极敏感区域加强水土保持工作仍然迫切。

Abstract

Selecting 4 erosion factors of rainfall erosivity

soil erodibility

topography undulating degree

and vegetation coverage

this paper evaluated the effects of the returning farmland to forest project(RFFP)on the changes of soil erosion sensitivity with the aid of USLE and GIS.Results showed that mild sensitivity and moderate sensitivity were the main sensitivity types and their area proportions were 39.61% and 29.04% before the RFFP and 37.79% and 34.03% after the RFFP

respectively.In the south

non-sensitivity and mild sensitivity were the main sensitivity types and in the southwest

the non-sensitive area increased.In the north

the moderately

highly

and extremely sensitive types embedded each other before the RFFP

but the distribution pattern of them became obviously regular after the RFFP.Before the RFFP

soil erodibility played an important role in erosion sensitivity

while the role of rainfall erosivity was quite ordinary.After the RFFP

the effect of soil erodibility decreased sharply

while the rainfall erosivity increased quit obviously.In a word

the RFFP has improved soil erosion sensitivity.The need for soil and water conservation is still urgent in the highly and extremely sensitive regions.

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