佛山市高明区生态安全格局和建设用地扩展预案
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广州地理研究所,广州地理研究所,广州地理研究所,广州地理研究所,中国科学院广州地球化学研究所,中国科学院广州地球化学研究所,广州地理研究所,广州地理研究所

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国家自然科学基金项目(41001385;40771218);广东省科技计划项目(2011B031100003)


The ecological security patterns and construction land expansion simulation in Gaoming
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Guangzhou Institute of Geography,Guangzhou Institute of Geography,Guangzhou Institute of Geography,Guangzhou Institute of Geography,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou Institute of Geography,Guangzhou Institute of Geography

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    摘要:

    城市生态环境问题已上升到生态安全的层面。以人类生存安全和理想人居环境为目标,基于空间数据和统计资料,利用景观安全格局原理和地理信息系统空间分析方法,构建了包含基本保障格局-缓冲格局-最优格局3个级别的水安全格局、地质灾害安全格局、大气安全格局、生物保护安全格局和农田安全格局,叠加得到高明区综合生态安全格局,在此基础上提出了高明区建设用地扩展最优方案和生态功能分区。结果显示,并非生态安全格局水平越高,城乡发展模式越优,缓冲生态安全格局下的高明区建设用地扩展模式,最可能实现生态安全保护与城镇扩展的和谐发展。综合生态安全格局明确了区域的生态环境敏感区和生态服务功能重要区,为区域生态功能分区提供了新的思路。

    Abstract:

    High intensity of human activities and inappropriate land-use modes bring an enormous pressure on the susceptible urban ecosystem. Recently, urban ecological and environmental problems have risen to the urban ecological security level in China, especially in economic-developed regions, such as the Changjiang Delta regions and Pearl River Delta regions. So, construction of a good regional ecological security pattern has become an effective means to protect the urban and rural ecological security, to create an optimum urban development mode for such regions and to control the rapid and disordered urban expansion. Aiming to protect the subsistence security of human beings and create an ideal human settlement, we firstly indentified the key points (sources) and ecological processes (landscape-resistance surfaces) for the regional ecological security pattern using the landscape security pattern theory and GIS spatial analysis method on the basis of the terrain, land-use and statistical data. Then, we built five ecological security patterns (the water, geological disasters, air, the biology and the farmland safety pattern), which contain three-level security patterns such as the Basic protection ecological security, the Buffer ecological security and the Optimum ecological security pattern for each element. Next, we overlaid the five ecological security patterns and developed a comprehensive three-level ecological security patterns for Gaoming district of Foshan City. Furthermore, we simulated four urban expansion patterns separately under the Inertial urban development pattern and the three-level ecological security patterns. Results showed that the urban regions always spread along the road and the original urban regions randomly. Open spaces, such as the farmlands and woodlands, were always firstly occupied due to the disordered urban expansion under the inertial development pattern. So the ecosystem security under the Inertial urban development pattern can not be basely protected. While under the Basic, the Buffer and the Optimum ecological security patterns, the integrity and connectivity of the whole ecological system can be progressively improved and the connectivity among towns will be progressively reduced. Integrating from different simulation results, the urban development pattern of Gaoming under Buffer ecological security pattern was the best one to protect the ecological safety and meet the needs of urban expansion simultaneously. It indicated that higher level of ecological security pattern did not mean a more optimum urban and rural development model. On the basis of the Buffer ecological security pattern simulation, we then divided the region of Gaoming into three ecological zones (the ecological zone with low mountains and hills, the eastern plains ecological zone along the Xijiang River, and the tableland-valley agriculture and forestry ecological zone). We further subdivided the three ecological zones into 12 sub-ecological zones and 12 ecological function zones using the hierarchical classification method. Then, the three-level ecological function zone patterns (ecological zones, ecological sub-zones and ecological function zones) of Gaoming were finally developed. It can be clearly seen that the comprehensive ecological security pattern of Gaoming clarified the most sensitive area of the ecology and environment and the most important regions of the ecological functions. Hence, the comprehensive ecological security pattern provided a new method for regional ecological function zoning.

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苏泳娴,张虹鸥,陈修治,黄光庆,叶玉瑶,吴旗韬,黄宁生,匡耀求.佛山市高明区生态安全格局和建设用地扩展预案.生态学报,2013,33(5):1524~1534

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