兰州市城镇化水平与其生态用地的供求关系

城市生态用地研究能够为土地资源利用与规划及城市生态安全调控提供科学方法与决策依据。通过构建城镇化综合发展水平指标体系,采用熵值法定量评价了1999—2008年兰州市的城镇化综合发展水平,利用碳氧平衡法分析了兰州市城市生态用地时间序列供求关系。基于定量研究结果,采用灰色关联模型评价了城镇化水平与城市生态用地供求的耦合关系。研究结果表明,经济城镇化与生态用地需求的灰色关联度最大,其次为人口城镇化;人口、经济城镇化发展与生态用地理论需求的趋势变化基本上同步。

Relationship Between Urbanization Level and Ecological Land Demand and Supply in Lanzhou City

Studies regarding urban ecological land can provide scientific methods and information for decisionmaking in land resource use and planning.Urbanization level of Lanzhou City during 1999—2008is evaluated using entropy method along with integrated urbanization index system.Furthermore,the supply and demand of urban ecological land was estimated based carbon-oxygen equilibrium theory.The coupling relationship between urbanization level and ecological land supply and demand was investigated by applying grey correlation analysis.The results show that the grey correlation degree between economic-urbanization and ecological land supply and demand was the biggest,followed by population-urbanization.The changing trend of economic-population-urbanization was highly consistent to that of ecological land supply-demand.