基于生态安全导向的城市空间扩展模拟与分析

发布时间：2018-04-21 21:48

本文选题：城市空间扩展 + Dyna-CLUE模型　；参考：《地理研究》2017年03期

【摘要】：进行城市空间扩展模拟分析研究,对于城市生态安全格局优化具有重要意义。基于Dyna-CLUE模型进行广州市的城市空间扩展模拟与分析,结果表明:城市化到现阶段,政府采取的土地利用数量调控对城市空间扩展的影响较为重要,空间区划的引导作用相对不明显;建设用地聚集度持续增大,单位面积内的斑块数则先增后减,二者揭示出的景观特征不完全一致;城市空间是外缘、飞地式和内填式三种空间扩展模式共同作用的结果,但在1990-2005年以外缘和飞地式为主,在2005-2020年则以外缘和内填式为主,此时新增斑块与原有斑块的建设用地连成大斑块,单位斑块上的建设用地数量呈降势,前后两个时段内,城市由"摊大饼"外延式逐渐转向集约节约的内填式扩展,城市生态文明建设初显成效。
[Abstract]:It is of great significance for the optimization of urban ecological security pattern to study the simulation of urban spatial expansion. The simulation and analysis of urban spatial expansion in Guangzhou based on Dyna-CLUE model show that: at the present stage of urbanization, the influence of land use quantity adjustment and control adopted by government on urban spatial expansion is more important. The guiding function of spatial regionalization is not obvious, the aggregation degree of construction land continues to increase, the number of patches per unit area increases first and then decreases, the landscape characteristics revealed by the two areas are not completely consistent, and the urban space is the outer edge. The results of the three spatial expansion models of enclave type and inner filling type were combined, but in 1990-2005 the outer edge and enclave type were dominant, and in 2005-2020, the outer edge and inner filling type were the main ones. At this time, the new patch was connected with the construction land of the original patch to form a large patch. The number of construction land per unit patch showed a decreasing trend. In the two periods before and after, the city gradually changed from the extension of "spread the cake" to the intensive and economical expansion of the inner filling, and the construction of urban ecological civilization showed initial results.
【作者单位】：华南农业大学资源环境学院;广州大学地理科学学院;华中农业大学土地管理学院;
【基金】：国家自然科学基金项目(41171070,41671175) 广东高校省级重点平台和重大科研项目(2014KGJHZ009) 广东省高等学校优秀青年教师培养计划资助项目(YQ2015127) 广州市属高校科技计划项目(1201421103)
【分类号】：TU984.113

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