【摘要】 城市化与生态环境之间存在复杂的相互耦合关系,开展城市扩张的生态环境效应研究是厘清"社会经济发展-土地利用-生态环境"协调发展机制的有效手段。以5期连续遥感解译的土地利用数据为基础数据源,借助"P-S-R"模型构建评价指标体系,综合分析2011～2015年重庆市城市扩张的生态环境效应时空分异特征,运用耦合协调模型及其分类原则揭示二者协调发展格局。研究结果表明:①重庆市城市扩张的社会经济压力和土地状态指数总体较低,生态环境响应指数维持在中等水平。②重庆市城市扩张的生态环境综合效应总体处于较低水平。综合效应指数总体轻微下降,整体和局部变化幅度均不超过10%,且空间差异不显著。原因在于经济社会压力、土地利用状态和生态环境响应三者效益叠加,相互制约和促进。③全市"社会经济-土地-生态"耦合度和耦合协调度皆呈波动下降态势,协调度均值在0.543～0.581之间,处于勉强协调阶段。④主城九区及涪陵、万州、永川城市扩张属于经济先行型发展模式,土地利用严重滞后是制约其系统协调发展的主导因素;除城口外其余25个区县属于生态先行型发展模式,其中渝东南和渝东北经济发展水平严重滞后是导致系统失调的重要因素,主城东和主城西社会经济发展和土地利用均相对滞后的是制约其协调发展重要原因。更多还原

【Abstract】 There is a complex coupling relationship between urbanization and ecological environment. It is an effective mean to clarify the coordinated development mechanism of "social economic development, land use, ecological environment" by studying the ecological environmental effects of urban expansion. Based on the land use data from 2011 to 2015, using "P-S-R" model evaluation index system and the coupling coordination model and its classification principle, this paper comprehensively analyzes the spatial and temporal differentiation characteristics of the ecological environment effect of urban expansion in Chongqing city, and reveals the coordinated development pattern between the urbanization and urban ecological environment. The results showed that:(1) The socio-economic pressure and land status index of urban expansion in Chongqing city were generally low, and the ecological environment response index remained at a medium level.(2) The comprehensive eco-environmental effects of urban expansion in Chongqing city was generally at a relatively low level. During the study period, the overall comprehensive effect index decreased slightly, and the overall and local variation ranges were no more than 10%, and the spatial difference was not significant. The main reason lied in the benefit superposition, mutual restriction and mutual promotion among the socio-economic pressure, land use status and ecological environment response.(3) The coupling degree and coupling coordination degree of "socio-economic, land, ecology" in the whole city declined in volatility. The average coordination degree was between 0.543 and 0.581, which was in the stage of barely coordination.(4) The nine districts in downtown and Fuling, Wanzhou, Yongchuan were in the economy leading model, and the serious lag of land use was the main factor restricting the coordinated development of the main urban system. Except Chengkou County, 25 districts and counties belong to the ecology leading model, in which the serious lag of economic development level in southeast and northeast Chongqing was an important factor leading the imbalance of the system. The backward socio-economic development and land-use in the east and west of the main city were the important reasons restricting its coordinated development.更多还原