基于动态指标的城乡交错带范围界定方法研究——以北京市平原区为例

Research on Division Method Based on Dynamic Index in Urban-rural Fringe——Taking Plain Area of Beijing as an Example

城乡交错带范围的界定是研究城乡交错带土地利用问题的基础。探讨了一种基于动态指标为主,辅以静态指标验证的城乡交错带范围的界定方法,提出了关于城乡交错带土地利用动态度变化趋势的规律性假设,在此基础上分析研究区不同时期TM影像的解译结果,提取出土地利用动态变化度,借鉴断裂点法找出突变点,划出城乡交错带的内缘和外缘,确定城乡交错带范围,并借助景观多样性指数和斑块体的分维数等静态指标对结果进行检验。

Defining boundary of urban- rural fringe was the basis of researching problems on land- use in this area. A kind of method, relying mainly on dynamic index while static index subsidiary was put up to provide reference to define the border quantitatively in this article. First, a regu- laxity assumption on change trend of dynamic degree of land - use in urban - rural fringe was put up. Based on the assumption, this paper analyzed the interpretation results of TM images in different periods of time, and picked up dynamic degree of land - use. Reference to the method of the breaking point,then this paper found the point mutation to determine the inner and outer edges.