摘要
引入指数功效函数模型测算兰州—西宁城市群的经济社会发展状况,基于InVEST模型评估城市群的生态系统服务水平,并运用耦合协调度模型剖析经济—社会—生态子系统的耦合协调关系及时空变化特征.结果表明:2000-2020年间,兰西城市群经济、社会子系统发展呈典型的“双核心”模式,城市群次中心发展不充分,低水平县区广布特征明显;水源涵养、水土保持和固碳释氧服务均呈增长趋势,且呈不同的空间分异态势;综合生态系统服务呈现从东北向西南递增的阶梯状格局,高值区集中在三江源地区,低值区位于白银市;经济—社会—生态子系统处于高度耦合状态,总体演进趋势一致,互动关系紧密;协调度增长14.63%,高值区位于各市州城市建成区,低值区集中分布于城市群东北部,不同协调度分区滞后子系统不同.
This paper measured the economic and social development of the Lanzhou-Xining urban agglomeration by the exponential efficacy function model.Based on the InVEST model,the level of ecosystem services in the urban agglomeration was assessed and the coupling coordination model was used to analyze the coupling coordination of economic-social-ecological subsystems as well as the spatial and temporal variation characteristics.The results showed that:From 2000 to 2020,the development of economic and social subsystems of the Lanzhou-Xining urban agglomeration showed a typical“double core”pattern,with insufficient development of the sub-centres of the urban agglomeration and a clear distribution of low-level counties.Water conservation,soil and water conservation,and carbon sequestration and oxygen release services were all on the increase and presented different spatial heterogeneity;The integrated ecosystem services showed a stepwise progression from northeast to southwest.The high values were concentrated in the three rivers source area and the low values were in Baiyin City.The economic-social-ecological subsystem was highly coupled,with a consistent overall evolutionary trend and close interaction.The coordination increased by 14.63%.The high-value areas were located in the built-up areas of cities and states,while low-value value areas were concentrated in the northeastern part of the urban agglomeration.In the coordination degree partitions,lag subsystems were different.
作者
赵武生
石培基
ZHAO Wu-sheng;SHI Pei-ji(College of Geography and Environment Science,Northwest Normal University,Lanzhou 730070,China;Land Use and Comprehensive Improvement Engineering Research Center of Gansu Province,Lanzhou 730070,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2023年第4期1883-1894,共12页
China Environmental Science
基金
国家自然科学基金资助项目(41771130)
甘肃省科技计划项目(20JR5RA529)。
关键词
InVEST模型
复合生态系统
耦合协调关系
时空变化
兰西城市群
InVEST model
complex ecosystem
coupling coordination
spatial-temporal variations
Lanzhou-Xining Urban Agglomeration
