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基于地理设计的城市扩张与生态安全格局的协调优化研究*
黄焕春, 陈逸伦, 许浩
南京林业大学 风景园林学院
摘要:
随着城市化进程的加快,城市扩张的规模增大、速度提高,带来了生态资源锐减、生态环境被破环、动植物生存受到威胁等生态问题。因此本文以天津市滨海新区为例,运用GIS技术综合分析生态安全格局,进而分析历史外推、内生发展和外生发展三种典型情景下城市扩张的利弊,最后提出城市合理扩张优化途径。结果表明:城市扩张不同模式与生态安全格局在冲突过程存在较大差异,可充分利用历史惯性扩张模式的特征进行优势发挥,依靠外生发展模式可以分散城市巨大集聚带来的生态安全问题,有效缓解城市扩张与生态安全之间的矛盾;对城市扩展的模式进行优化,可从结构优化、交通引导、建设永久生态绿地、工业优化、城市增长边界的划定等方面着力。通过本研究以期为城市合理扩张提供参考,为促进城市与生态协调发展及建设生态型城市提供新的方法论实践。
关键词:  城市扩张  生态安全格局  地理设计
DOI:
分类号:
基金项目:国家自然科学基金资助项目(31600571), 国家社科基金重大项(13&ZD162) ,江苏高校品牌专业建设工程项目(PPZY2015A063)
Study on optimization of urban expansion based on ecological security pattern using Geo-design: A case study for Tianjin Binhai area.
huanghuanchun, chenyilun, xu hao
nanjing forestry university
Abstract:
With acceleration of urbanization, enlargement of urban scale and improvement of urban expansion speed, ecological problems such as sharp decrease of ecological resources, destroying of ecological environment, threat to habitats for plants and animals are caused. Therefore, taking the area of Binhai District, Tianjin City as an example, by using GIS technology the paper analyzes ecological security pattern, and then analyzes advantages and disadvantages of urban expansion under three special conditions of history extrapolation, endogenous development and exogenous development and poses optimization method of reasonable urban expansion. The results show that :the different modes of urban expansion and the ecological security pattern are quite different at the conflicting point. The characteristics of the historical inertial expansion mode can be fully utilized to undertake advantageous development. The exogenous development model can disperse the ecological security problems brought by the huge urban agglomeration and effectively alleviate the contradiction between urban expansion and ecological security pattern. Optimization of urban expansion mode should focus on structure, transportation, construction of permanent ecological green space, industrial migration guidance, and urban growth boundary demarcation, etc. Through studies, the paper hopes to provide reference for reasonable urban expansion and ideas to coordinate development between city and ecology and build ecological cities.
Key words:  Urban expansion  Ecological security pattern  Geo-design