基于GIS与USLE的汕尾市土壤侵蚀特征研究

Research on Soil Erosion Characteristics of Shanwei City Based on GIS and USLE

采用通用土壤流失方程和GIS空间分析技术,研究了汕尾市土壤侵蚀强度的空间分布特征及与土地利用的关系,结果显示:汕尾市土壤侵蚀以自然侵蚀为主,主要分布在西部山区、南部沿海部分地区,侵蚀程度轻度。侵蚀面积最大的为陆丰市,其次为海丰县,再次为城区,陆河县土壤侵蚀面积最小。自然侵蚀主要分布在有林地,其他林地、果园、裸地等土地利用类型也有少量侵蚀。研究成果可为汕尾市进行水土保持规划、合理开发利用水土资源提供决策参考。

This paper selected Shanwei City as the research region,based on USLE and spatial analysis technology of GIS,studied the spatial distribution characteristics of soil erosion intensity in Shanwei City and its relationship with land use.The results showed that soil erosion in Shanwei City was dominated by natural erosion,distributed in the mountainous areas of the west and parts of the southern coast,among them;mild erosion was the main type of natural erosion.In terms of spatial distribution of soil erosion,the largest erosion area was Lufeng City,followed by Haifeng County,the urban area was third,and Luhe County had the smallest soil erosion area.Judging from the relationship between soil erosion and land use,natural erosion was mainly distributed in forest,and other forest land,orchard,bare land also had small amount of erosion.This paper can provide decision-making reference for water and soil conservation planning in Shanwei City,to promote rational development and utilization of water and land resources in this region.