土地用途转换表征模型与应用

Representation Model for Land Use Conversion and Its Application

介绍了栅格面积成分数据模型,推导了土地用途转换动态度公式,为区域土地用途转换提供了表征方法与手段。在此基础上,以东北地区土地用途转换为案例,采用栅格面积成分数据模型与土地用途转换动态度公式,提炼了1988～2000年东北地区土地用途转换的特征。研究表明,东北地区土地用途转换导致了各种土地利用类型的收缩与扩张,并体现为水田与旱地相互转换、退耕还林/还草等9种主要转移类型。

Raster-oriented area percentage data model was introduced.The formula of dynamic degree of land use conversion was deduced,which provided the representation methods and ways for the regional land use conversion.On this basis,taking the land use conversion of Northeast China as an example,the characteristics of the land use conversion in Northeast China during 1988-2000 were extracted by using the raster-oriented area percentage data model and land use conversion dynamic degree formula.The research results indicated that the land use conversion in the Northeast China resulted in the dramatic shrinkage and expansion of various kinds of land use type,which was especially characterized by nine kinds of land use conversion including mutual conversions between paddy field and dry farming land,conversions of cultivated land to forest area and grassland cover and so on.