GIS支持下的土壤侵蚀强度景观空间结构研究

Study on Spatial Structure of Landscape on Soil Erosion Intensity Based on GIS

从土壤侵蚀角度看 ,自然生态系统景观由微度土壤侵蚀和其它等级土壤侵蚀强度的地域组成 ,其景观基本元素有斑、廊、基。在 GIS支持下研究了宜昌地区土壤侵蚀强度景观的面积对比、多样性指数、优势度指数和多度等参数。通过 RS— GIS一体化的土壤侵蚀遥感调查 ,认为宜昌地区中观尺度的土壤侵蚀强度景观结构类型有 :散置斑块景观、指状交错景观、网络景观。

The natural ecosystem landscape is made of micro soil erosion and different soil erosion intensity district in soil erosion region. The essential elements of the spatial structure of landscape are patch, corridor, matrix by GIS, we study on landscape of soil erosion about following parameter: ratio of area, diversity index, dominance index and multiplicity. According to RS-GIS integrated method, we think that the kinds of spatial structure on landscape of soil erosion is patch sprinkle, intersect like finger, network landscape in Yichang region on middle scale. In the course of soil and water conservation project, we try to use clue of landscape ecology design in order that making the employment of repairing land possess more scientific.