摘要
人口容量是河谷型城市发展的战略性议题。在总结相关研究基础上,分析了其主要影响因素,构建基于河谷用地空间、可供水资源及生态环境三个影响因素下的人口容量测算方法。以典型河谷型城市天水市为例,计算出上述三个因素下的各自适度人口容量和最大人口容量分别为:73.5万和109.8万;77.66万和211.39万;73.37万和116.96万。根据木桶原理“最短边”因素发现,现有发展条件下天水市适度人口容量应为73.37万、最大人口容量为109.8万。
Population capacity is a strategic problem of valley - city development. It includes optimal population capacity and maximal population capacity. In this paper main influence factors of population capacity in the valley - city are analyzed. In succession, based on three factors of valley land space, usable water resources and eco - environment, measurable method of population capacity in the valley - city is probed into and introduced principally. Firstly, to the valley land space, the authors mainly analyze per capita land criteria, and then compute the population capacity of valley land space through total usable land areas. Secondly, the problem of usable water resources in the valley - city is discussed according to the criteria of per capita comprehensive use water quantity, and then population capacity might be obtained through the whole usable water resources. Finally, population capacity calculation methods of eco - environment are probed into and summarized by per capita urban greenbelt criteria. Taking Tianshui city as an example, optimal and maximal population capacity are respectively calculated via the methods mentioned. Through population capacity calculation of valley land space, optimal and maximal population in Tianshui city respectively is 0.735 million and 1.098 million; through that of usable water resources, optimal and maximal population is equal to 0.7766 million and 2. 1139 million; and through that of eco - environment, optimal and maximal population is 0.7337 million and 1. 1696 million. According to restriction theorem, the authors draw the basic conclusion that under present conditions optimal population capacity is 0. 7337 million and maximal population capacity is 1.098 million in Tianshui city.
出处
《经济地理》
CSSCI
北大核心
2006年第4期614-618,共5页
Economic Geography
关键词
河谷型城市
人口容量
河谷用地空间
可供水资源
生态环境
天水市
valley - city
population capacity
valley land space
usable water resources
eco - environment
Tianshui city
