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区域景观格局优化对提升生态系统的功能及价值、限制城市格局无序蔓延具有重要意义。以成都市为研究区,应用RS与GIS技术,运用景观指数和生态服务功能评价方法深入分析研究区景观格局时空变化特征和区域生态功能空间差异,并在此基础上辨识生态源地的空间分布,以“田园城市”理念为指导,应用累积耗费距离模型,构建区域生态廊道和生态节点,探索现代田园城市景观格局优化的途径。结果表明:在城市化建设中,有大量的耕地被转化成了建设用地;区域生态功能强度空间差异性显著;生态源地主要分布在龙门山、邛崃山、长丘山和龙泉山一带;根据研究区实际情况构建了“四环六射”的道路生态廊道、河流廊道以及圈层农业廊道;形成了交汇点、湿地和森林公园为主的生态节点。该研究方法及结果对成都市建设世界现代田园城市及解决中国大都市发展中的“大城市病”问题具有重要的参考依据。
The optimization of regional landscape pattern plays an important role in enhancing the function and value of ecosystems and limiting the disorderly spread of urban pattern. Taking Chengdu as the research area, RS and GIS technologies were applied to analyze the temporal and spatial variation of landscape pattern and the spatial differences of regional ecological functions by using the landscape index and ecological service function evaluation method. On the basis of this, the spatial distribution of ecological sources was identified Guided by the concept of “Garden City”, this paper applies the cumulative distance model to construct regional ecological corridors and ecological nodes and explores ways to optimize the modern urban landscape pattern. The results showed that a large amount of arable land was transformed into construction land in the urbanization. There was significant spatial difference in regional ecological function intensity. The ecological sources were mainly distributed in Longmen Mountain, Mount Qionglai, Changqiu Mountain and Longquanshan Mountain. According to the research The actual situation of the district constructs the road ecological corridors, river corridors and agricultural corridors in the circle, and forms the ecological nodes mainly including junctions, wetlands and forest parks. The research methods and results have important reference for the construction of modern garden city in Chengdu and the solution to the “big city disease” in the development of China's metropolis.