兰州市城市化与生态系统服务价值的耦合关系定量研究

Quantitative Coupling Between Urbanization of Lanzhou City and Its Ecosystem Service Value

[目的]定量分析兰州市城市化与生态系统服务价值的耦合关系,以期为兰州市在城市化进程中采取适当的土地利用模式提供科学依据。[方法]在构建兰州市生态系统服务价值和城市化水平2个子系统的基础上,采用熵值法进行标准化处理,建立兰州市2004—2014年城市化与生态系统服务价值的耦合协调模型,测定兰州市城市化与生态系统服务价值的耦合协调状况。[结果](1)兰州市城市化水平从2004年的0.585 1上升到2014年的0.659 6,11a间共上升了0.074 5,年均上升0.006 8,总体上呈上升趋势;(2)兰州市生态系统服务价值从2004年的83.24亿元增加到2014年的95.02亿元,在11a内增加11.78亿元,年均增加1.07亿元,也呈递增趋势。[结论]兰州市2004—2014年城市化与生态服务价值的耦合关系呈现倒U形发展趋势,总体耦合协调度处于中度协调状态之上,在2009—2012年达到协调高峰期。

[Objective] The coupling link between the urbanization of Lanzhou City and ecosystem service value was analyzed quantitatively to provide scientific basis for appropriate land use in the process of urbanization in Lanzhou City. [Methods] The ecosystem service value and urbanization level in Lanzhou City were constructed and the entropy method was adopted to standardize the model. A coupled and coordinated model between urbanization and ecosystem service value was established based on the data collected from 2004 to 2014 in Lanzhou City. The relationship between urbanization and ecosystem service value, as well as the land use pattern of urbanization, were analyzed. [Results] （1） The urbanization level of Lanzhou City increased from 0. 585 1 in 2004 to 0. 659 6 in 2014, with an increment of 0. 074 5 in 11 years, and annual rate of 0. 006 8. And the overall trend of urbanization was increasing. （2） The value of Lanzhou ecosystem services increased from 8. 342 billion yuan in 2004 to 9. 502 billion yuan in 2014, with an increment of 1. 178 billion yuan, and an average annual rate of 107 million yuan, it also showed an increasing trend. [Conclusion] The coupling relationship between urbanization and ecological service value of Lanzhou City in 2004-2014 was an inverted U shape. The overall coupling coordination degree was in moderate coordination state, and the coordination peak occurred in 2009-2012.