高密度人口聚集区与城镇用地的空间差异研究

Spatial Difference Between the High Density Population Aggregation Area and Urban Built-up Area

将人口密度为1500人/km2和人口规模为6万人的区域提取为我国高密度人口聚集区;再运用叠置分析、重心和标准差椭圆分析模型,对高密度人口聚集区与城镇用地的空间分布差异进行定量分析,以期为协调人口与土地资源的合理配置提供参考,为未来人口、土地和经济城市化提供决策依据。结果表明,2000~2015年全国高密度人口聚集区与城镇用地的重叠率不足30%,人口集聚于非城镇用地的现象十分普遍。从区域上来看,沿海地区的人口集聚与城镇用地拓展协调性比内陆好,南部沿海经济区城镇用地拓展与人口集聚不匹配的现象较严重;从分布方向上看,高密度人口聚集区与城镇用地分布均为南北方向分散,东西方向集中;北部城镇用地分布多于高密度人口聚集区,南部则相反,整体上二者的空间分布趋于一致。

In this paper, we extracted the area with high density population aggregation (AHPA), based on the population density and population size at first. Then, we used the overlay analysis and gravity center and standard deviational ellipse method to analyze the spatial differences between the AHPA and urban built-up area (UA) in China from 2000 to 2015. The results show that ①the overlap rate between AHPA and UA in China from 2000 to 2015 is less than 30%, and it is common that population aggregates in non-urban construction land.②The coordination of population aggregation and UA in coastal areas is better than that in inland areas, and in the southern coastal region the AHPA not accompanying with UA is widely distributed.③The dominant direction of AHPA and UA is both north-south, and the UA area are larger than the AHPA area in the north, while the opposite in the south. Overall, their spatial distribution tends to be consistent. This study can provide a reference for coordinating the rational allocation of population and land resource, and provide a decision-making basis for population, land and economic urbanization in the future.