成渝城市群区域生态与城镇发展双网络格局分析及时空演变

协调生态网络格局与城镇网络格局是城市可持续发展的重要课题。基于2000、2010、2020年成渝城市群3期土地利用数据，应用形态空间格局分析(MSPA)、景观格局指数、景观连通性、最小累计阻力(MCR)模型等方法构建研究区生态源地与生态廊道、经济社会源地与交通廊道形成的区域生态网络格局与城镇发展网络格局，分析节点、廊道、源地、网络等“点、线、面、网”4类空间要素特征与演变趋势，探讨区域双网络格局空间关系与干扰时空变化情况。结果表明：(1)2000—2020年，研究区生态源地与生态廊道受到不同程度城镇化影响，两者总面积分别减少2660.26 km²、1169.9 km²,经济社会源地与交通廊道总面积则分别增长4324.19 km²、2392.14 km²;(2)以重庆中部、四川西南部为核心的高密度区生态关键点在2000—2020年间重心呈现先由东至西南迁移，后又向东及东北回移的趋势，数量减少了311,同时2020年生态干扰点数量达到2000年的3倍；(3)2000—2020年交通廊道对生态源地的干扰不...

Regional pattern analysis and spatio-temporal evolution of ecological and urban dual network in Chengdu-Chongqing urban agglomeration

Coordination of ecological network pattern and urban network pattern is an important topic of urban sustainable development. Based on the land use data of Chengdu-Chongqing urban agglomeration in 2000, 2010 and 2020, we applied MSPA analysis, landscape pattern index, landscape connectivity and MCR model, used ecological sources and ecological corridors, economic and social sources and traffic corridors to construct the regional ecological network pattern and urban development network pattern in the study area. This study analyzed characteristics and evolution trends of four types of spatial elements (point, line, plane and network) formed by node, corridor, source and network, and discussed the spatial relationship and spatio-temporal changes of the regional dual network pattern. The results showed that:(1) from 2000 to 2020, the total area of the ecological sources and the ecological corridors in the study area was affected by urbanization to different degrees, and the total area decreased by 2660.26 km² and 1169.9 km² respectively, while the total area of the economic and social sources and the traffic corridors increased by 4324.19 km² and 2392.14 km², respectively. (2) from 2000 to 2020, the center of gravity of the ecological key points in the high density area with central Chongqing and southwest Sichuan as the core moved from east to southwest, and then moved back to east and northeast, and the number of ecological key points decreased by 311. Meanwhile, the number of ecological disturbance points in 2020 increased by three times than that in 2000. (3) from 2000 to 2020, the disturbance of traffic corridors to ecological sources increased, and the percentage of intersecting patches and length of intersecting corridors between them increased by 13.13% and 33.08%, respectively. According to the analysis results, four strategies, including node response, corridor optimization, source protection and network connection, are proposed to provide the basis and reference for the protection of the national ecological space and regional new-type urbanization.