| 摘要: |
| 作为城市关键的景观结构要素，绿色廊道具有保护生物多样性、过滤污染物、防止水土流失、改善生态环境等功能。它将离散的生境斑块进行连通，实现生态物质、能量、信息的交换，对于维护和构建城市生态安全具有重要作用。以南昌市为例，运用“源-汇”理论，借助GIS空间分析技术，以最小累积阻力模型规划构建城市绿色廊道系统，以引力模型进行优化，确定南昌市廊道建设尺度，并进行安全评价。结果表明：构建的绿色廊道系统以林地、耕地为主，形成城乡生态安全屏障，廊道安全宽度应达100m，其连接度、闭合度、点线率高，建设成本比低。该结论能为城市生态建设实际提供理论参考。 |
| 关键词: 风景园林 绿色廊道 生态安全 源-汇理论 最小累积阻力模型 宽度 |
| DOI： |
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| 基金项目: |
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| Urban Green Corridor System Planning Based on Ecological Security—Taking Nanchang City as the Example |
| LIU Huabin,YANG Mei,LI Baoyong,GUO Shiyun,GU Xinren |
| Abstract: |
| As a key landscape structural element of the city, the green corridor has the functions of protecting biodiversity, filtering pollutants, preventing soil erosion and improving the ecological environment. It connects discrete habitat patches to realize the exchange of ecological materials, energy and information, which plays an important role in maintaining and constructing urban ecological security. Taking Nanchang City as the example, using the "source-sink" theory, using GIS spatial analysis technology, the urban green corridor system is planned with the Minimum Cumulative Resistance model, and the gravitation model is optimized to determine the construction scale of Nanchang city corridor and to conduct safety evaluation. The results show that the green corridor system is mainly composed of forest land and agricultural land, forming an urban and rural ecological security barrier. The safe width of the corridor should be 100m, the connection degree, the degree of closure, the point line rate are high, and the construction cost ratio is low. This conclusion has certain theoretical value and reference significance for urban ecological construction. |
| Key words: landscape architecture green corridor ecological security source-sink theory minimum cumulative resistance model width |
