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以福建省为研究区域,结合“3S”技术与野外调查,提取土地利用、植被覆盖度和坡度分级等信息,生成2007年水土流失现状图,并采用凸壳模型进行水土流失核心区划分。结果表明:福建省水土流失核心区共有“四大片”(汀江片、晋江片、九龙江片与赛江片)和“六小片”(涉及邵武、顺昌、南平、古田、罗源、大田、德化和永泰等县、市、区)。将水土流失核心区与前人划定的严重水土流失区和重点治理区相比较,“四大片”的主体范围较为一致,但是严重水土流失区和重点治理区以行政区域为单元,划分指标为各类水土流失面积占土地总面积的比例,而水土流失核心区直接确定水体流失严重的地域,更加详细具体。
Taking Fujian Province as the research area and the “3S” technology and field investigation, the information of land use, vegetation coverage and slope grade was extracted to generate the current situation map of soil and water loss in 2007, and the convex hull model was used to divide the core area of soil and water loss . The results show that the core area of soil and water loss in Fujian Province consists of “four major films” (Tingjiang film, Jinjiang film, Jiulongjiang film and Saijiang film) and “Six small films” (involving Shaowu, Shunchang, Nanping, Gutian , Luoyuan, Daejeon, Dehua and Yongtai counties, cities and districts). Comparing the core area of soil and water loss with the serious water and soil loss areas and key control areas demarcated by the predecessors, the scope of the main body of the “Four Major Areas” is relatively consistent. However, the serious water and soil loss areas and key control areas are divided into administrative areas, Indicators are the proportions of all types of soil erosion areas in the total area of the land, while the core area of soil erosion directly determines the areas where water loss is serious, which is more detailed and specific.