西部平原城市与山地城市多中心开发的环境绩效比较研究：以成都和重庆为例

我国很多平原城市与山地城市都选择了多中心开发模式，但平原城市大多是人为规划的形态多中心，山地城市往往是自然选择的形态与功能多中心。两种不同的多中心开发模式，将会带来怎样的环境绩效？为此，本项目选择平原城市—成都和山地城市—重庆为例，揭示两者不同的多中心模式及其环境响应。首先，从形态与功能维度建立多中心测度体系，对形态—功能多中心及逻辑关系进行定量表达，揭示平原城市和山地城市不同的多中心演化路径及形成机制；其次，集成定量遥感和多源数据，获取景观破碎、城市热岛、大气污染等环境要素的空间分布，评估多中心开发的环境绩效并识别环境敏感区域；再次，采用空间分析和统计分析，揭示平原城市与山地城市的形态—功能多中心耦合与环境绩效的内在联系；最后，构建CA-ABM模型，以环境绩效提升为目标，模拟和评估形态—功能多中心开发方案，提出多中心优化策略。本项目可丰富城市地理学和生态学研究，为优化多中心规划提供借鉴。

Many Chinese cities on the flatland and mountainous area have adopted the strategy of polycentric urban development. The polycentric urban form is just morphological in many cities on the flatland driven by proactive master plan, whereas the form is generally both morphological and functional in mountainous cities because of natural determinants. What kind of environmental performance will be brought by these two kinds of polycentric forms? To answer this question, we will reveal the difference of polycentric urban development and its impact on environmental performance between cities on the flatland and mountainous area, taking Chengdu and Chongqing as the case. First, we will propose a multi-dimensional measurement of polycentrism and explore their logical relationship between morphological and functional polycentrism. We will reveal the differences of development trajectory and underlying determinants of polycentrism between cities on the flatland and mountainous area. Second, we will extract the indicators of the landscape fragmentation, urban heat island, and air pollution, employing a comprehensive remote sensing model. Based on the indicators, we will assess environmental performance of polycentric cities and identify the environment sensitive areas. Third, we will explore the environmental response to morphological and functional polycentrism among cities on the flatland and mountainous area, through the correlation analysis and response analysis. Finally, we will simulate and assess the scenarios of polycentric urban development and propose adaptive spatial strategy for better environmental performance, using an urban growth model of CA-ABM which incorporates a number of environmental considerations. By doing so, we anticipate to enrich the study of urban geography and urban ecology and provide suggestions to optimize the plan of polycentric city.