吉林省中部地区后备城镇建设用地潜力及空间分布研究

后备城镇建设用地潜力及空间分布研究是科学制定区域空间发展战略和优化城镇发展格局的基础。以吉林省中部地区为例,主要利用GIS空间分析方法,综合考虑地形、土地利用类型、基本农田分布、土地利用规划、人口及城镇发展等因素,对区域后备城镇建设用地极限潜力和有效潜力的数量及空间分布进行分析。研究表明:(1)吉林省中部地区后备城镇建设用地极限潜力规模为14 913.32 km~2,丰富程度由北向南呈降低趋势,主要受行政区规模、气候条件和地理环境特征的影响;(2)极限潜力利用优势度指数为0.467 8,偏北区域利用优势度整体高于偏南区域,空间分布格局与地形和城镇密集程度密切相关;(3)有效潜力规模为2 214.91 km~2,丰富程度为中间区域高,西北和西南区域低,东部边缘区域为中等水平,空间分布格局与城镇化水平和城镇密集程度联系紧密;(4)人均有效潜力规模为106.65 m~2/人,丰富程度整体为中间区域高,西部边缘区域低,北部、东部及南部3个地区的边缘区域为中等水平,空间分布格局除受城镇化水平和城镇密集程度的影响外,与人口分布特征也有一定关系。

Research on Potential and Spatial Distribution of Reserved Urban Construction Land in Central Jilin Province

Research on potential and spatial distribution of reserved urban construction land is the basis for scientifically formulating regional spatial development strategy and optimizing urban development pattern. This paper takes central Jilin Province as a case study to analyze the quantity and spatial distribution of limit potential and effective potential of reserved urban construction land mainly with spatial analysis methods on GIS platform, considering the factors of terrain, land use type, distribution of basic farmland, land use planning, population and urban development. The results show that: (1) the limit potential of reserved urban construction land in central Jilin Province amounts to 14 913.32 km², the values tend to decrease from north to south, which is mainly affected by the administrative region size, climate conditions and geographical environment characteristics; (2) the limit potential utilizing dominance degree index of central Jilin Province is 0.467 8, the values of north parts are higher than that of the south parts, which is closely related with terrain and urban density; (3) the effective potential of reserved urban construction land in central Jilin Province amounts to 2 214.91 km², the major trend of spatial distribution shows that values are high in the middle part, low in the northwest and southwest parts, and medium in the eastern edge part, which is closely related to urbanization level and urban density; (4) the effective potential of reserved urban construction land per capita is 106.65 m² per person, the values are high in the middle part, low in the western edge part, and medium in the edge region of northern, eastern and southern parts, which is mainly affected by urbanization level and urban density, and also has a certain relationship with the population distribution characteristics.