基于DEM的水系对城市化空间格局机制研究--以兰州-西宁区域为例  

The mechanism of water system to urbanization spatial pattern based on DEM——A case of Lanzhou-Xining area

作　　者：刘辉[1,2] 段汉明[3,2] 薛亮[4] 刘芳[1] 

机构地区：[1]长安大学建筑学院,西安710061 [2]西北大学城市与资源学院,西安710127 [3]河南工业大学城市科学与区域发展研究所,郑州450052 [4]陕西师范大学旅游与环境学院,西安710062

出　　处：《干旱区资源与环境》2011年第9期18-24,共7页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金(50678149);国家社会科学基金(05XRK010)联合资助

摘　　要：利用兰州-西宁区域的DEM数据,采用ArcGIS9.3技术,通过水文分析、三维仿真模拟、格网法等空间分析方法和分形模型研究,结果表明河流对兰州-西宁区域城市化空间格局形成的自然机制,包括:地势高低决定了人口城市化空间聚集的方向性;水系的空间形态奠定了城市点-轴分布格局;水系分维和城市体系分形具有相似性,并且水系的分维数大于城市体系的分维数;水系不仅决定各个城市在区域上空间分布形态,而且影响和制约城市建设用地的方向和形态。By using of DEM data in Lanzhou-Xining area,using ArcGIS9.3 technology,and by means of fractal analysis and model results,such as hydrological analysis,three-dimensional simulation and the spatial grid method,we studied the natural mechanisms of the river in the formation of urbanization spatial pattern in Lanzhou-Xining area.Results showed： ①Terrain determines the urbanization direction of the degree of spatial population aggregation.②Spatial form of water establishes the city-axis distribution pattern.③The fractal dimension of water system is similar to that of urban system,and the fractal dimension of water system is greater than that of the urban system.④The water system not only determine the spatial distribution of the cities in the region,but also affects and constraints the direction and shape of the urban construction land.

关 键 词：水系 机制 空间格局 

分 类 号：K928.5[历史地理—人文地理学]