基于遥感的黄土丘陵沟壑区人口密度分布模拟——以甘肃省榆中县为例

基于“面向对象”的人口分配原则，通过扩展的城市人口-面积异速生长模型，以SPOT5遥感影像为基本数据源，提取居民地信息；以榆中县为例，建立居民地分类体系，采取城乡人口分割算法，以人口统计数据为总量控制建立了人口分布的反演模型，模拟了榆中县域人口的空间分布。研究方法可为黄土丘陵沟壑区中尺度人口分布模拟的理论与应用研究提供借鉴。

Simulating Population Density Distribution of Loess Hilly-gully Region Based on Remote Sensing:Taking Yuzhong County as a Case Study

Spatial distributing of statistical population data is an effective way to integrate statistical data and natural factors. With Yuzhong County in Lanzhou as research unit,this paper makes an elementary study for simulating spatial distribution of population density in small scale. Based on the statistical population data, this research analyses the relationship between population density and land use in Yuzhong County. Then,taking GIS software and SPSS statistical software as tools,established the model of population distribution by means of regres-sion analysis. Basing on the principia of object-oriented population distribution, this paper extends the model of allometrie growth of urban population-area study, bring forward model of rural and urban population -area. Classification system of residential points was built up, infor-mation of residential area was extracted from SPOT5 remote sensing images and population distribution in the urban and rural region of Hilly-gully was simulated by using the method of "detaching urban-rural population" based on above the models. The method used in this pa-per can be referenced by the theoretic and applied researches for middle-scale population distribution. The method used in this paper can be referenced by the applied researches for county-scale population distribution. At the same time, the results can provide a theoretieal basis for promoting urbanization process and improving the management of population ,resources and environment in Yuzhong County.