基于GIS的广东省水土流失潜在危险度评价  

Assessment on Potential Danger Degree of Soil and Water Loss in Guangdong Province Based on GIS

作　　者：郑国权[1] 张晓远[1] 刘协亭[1] 

机构地区：[1]广东省水利电力勘测设计研究院,广东广州510635

出　　处：《水土保持通报》2014年第2期139-141,145,共4页Bulletin of Soil and Water Conservation

摘　　要：以GIS为支撑,选取整个广东省为研究区域,基于对自然界潜在水土流失强度的客观认识,综合考虑区域内坡度、坡长、土壤、降雨及地质等因子,通过空间叠加分析,对区域水土流失潜在危险度进行了度量和评价,生成了广东省水土流失潜在危险度分布图。分析结果表明,广东省水土流失潜在危险分布区以无险、轻险型区为主,其面积占全省面积的80%以上,主要分布在平原区;重险型区域面积占该省面积的18.3%,主要分布在东部、南部、北部地势较高,降雨量较大的山丘区,区内植被一旦遭到破坏,极易发生流失,是水土保持工作中的重点预防保护区域。The degree of soil and water loss in Guangdong Province was studied by using GIS technology.Factors relating to the degree of soil erosion,such as slope steepness,slope length,soil,rainfall and geological lithology,were considered.By the method of spatial overlay analysis,the potential danger degree of soil and water loss in Guangdong Province was measured and assessed,and finally a map of its distribution was generated.Analysis results show that most of the soil erosion potential danger areas in Guangdong Province were no risk or light risk areas,which covered more than 80% of the whole province area,mainly distributed in the plains.It is worth noting that the heavy risk areas are the key prevention and protection areas in soil and water conservation,which covered 18.3%of the whole province area and was mainly scattered in hilly areas with higher relief and larger rainfall.Once the vegetation in these areas is destroyed,they are prone to erosion.

关 键 词：GIS 水土流失 潜在危险度 广东省 

分 类 号：S157.1[农业科学—土壤学]