土地利用/土地覆盖变化动态方程的建立与分析

Establishment and analysis of dynamic equation used in land use/land cover change.

土地利用/土地覆盖变化研究的一个重要目的是对这种变化进行数量化的描述.该文以大庆市为实例,介绍了以TM卫星影像数据为数据源,提取土地覆盖信息的方法,并以此为基础建立以时间为自变量的三次方程,来描述土地利用类型的数量的动态情况.该文还介绍了方程参数显著性检验的方法,并通过对方程进行多次求导,得到新的方程,来描述研究期间土地利用类型面积的变化速度、加速度以及加加速度.从实例分析的结果来看,所建立的方程可以准确、全面地表达土地利用/土地覆盖变化的动态情况.

One of the important purposes of land use/land cover change(LUCC) research is to show this change in quantity.This paper takes Daqing City of Northeastern China's Heilongjiang Province as an example,and introduces the way of gaining land cover information based on the TM image.Then the cubic equation is established to describe the dynamic situation of account of land use.This paper discusses the method of hypothesis testing on equation parameters,and the way of getting new equations to explain the speed,acceleration and jerk through calculating the differential coefficient of cubic equation.Considering the results of the example,the equation can describe the dynamic situation of LUCC correctly and completely.