摘要
土壤侵蚀是土地退化的根本原因,也是导致生态环境恶化的重要因素。以辽西地区作为研究对象,利用修正的土壤流失方程(RUSLE)计算了辽西地区的土壤侵蚀量,对土壤侵蚀强度进行了分级,同时对不同的土壤侵蚀强度在数量上、空间分布及与土地利用方式的相关性上进行了分析。结果表明:辽西地区的土壤侵蚀强度等级以轻度为主,强度侵蚀、极强度侵蚀和剧烈侵蚀均有发生,但所占百分比不大;朝阳市是辽西地区土壤侵蚀最严重的地区,葫芦岛市次之,锦州市和阜新市土壤侵蚀状况一般;辽西地区的微度、轻度、中度侵蚀主要分布在旱地上,强度、极强度和剧烈侵蚀主要分布在中覆盖度的草地、有林地和疏林地上;增加林地、草地的覆盖度,减少坡耕地的分布是减少辽西地区土壤侵蚀的主要措施。
Soil erosion is the basic reason of land degradation.It is also the important factor resulting in ecological environment deterioration.This paper selects the west of Liaoning province as the research object.It uses revised universal soil loss equation to calculate soil erosion and classify soil erosion intensity.It also analyzes soil erosion quantity,spatial distribution and the relation with land use.Results show that low-level is the main soil erosion level.High-level,ultra-high-level and acute also happen,but their percentages are relative low.Chaoyang city is the most serious city in west of Liaoning province,Huludao city is the second.Jinzhou city and Fuxin city are common.The slight,low-level and medium-level soil erosion distribute mainly in arid land.High-level,ultra-high-level and acute soil erosion mainly distribute in medium covered meadow,forest land and sparse forest land.Increasing vegetation coverage of forest land and meadow and decreasing the distribution of sloping land are the primary measures in controlling soil erosion.
出处
《水土保持研究》
CSCD
北大核心
2008年第4期48-52,共5页
Research of Soil and Water Conservation
基金
国家973项目(2002CB412507)
关键词
土壤侵蚀
通用土壤流失方程
地理信息系统
soil erosion,revised universal soil loss equation（RUSLE）,geographic information system（GIS）
