【摘要】 在土地极其有限、保护与发展压力同样巨大的形势下,科学判别和保护城市扩张的生态底线具有重要战略意义。探讨城市生态底线的科学内涵,提出通过构建生态安全格局保障城市的基本生态系统服务。以北京市为例,运用景观安全格局理论和GIS技术,通过对水文、地质灾害、生物、文化遗产和游憩过程的模拟和分析,判别维护上述过程安全的关键性空间格局,构建不同安全水平的综合生态安全格局,特别是界定最低安全标准下的景观格局。并以生态安全格局为刚性框架,模拟北京城镇扩张格局。结果显示:基于生态安全格局的城镇发展格局,用尽可能少的土地,维护城市的基本生态系统服务,同时为城市发展提供充足的建设用地,是实现精明保护与精明增长的有效途径。更多还原

【Abstract】 With Beijing as an example,the minimum ecological security pattern is defined as the essential spatial pattern safeguarding the basic ecosystem services for the city.First,it defines the basic ecosystem services in Beijing,including hydrological regulation,geological disaster prevention,biodiversity and cultural services.Second,based on the theory of landscape security pattern and GIS models,ecological security patterns are designed to manage urban flood and storm water,prevent geological disasters,conserve biodiversity,and protect cultural heritage and recreation.These patterns are integrated into a comprehensive ecological security pattern with different security levels.The minimum ecological security pattern is then used as the framework to delineate future urban growth patterns.The results show that the ur-ban growth pattern based on ecological security pattern maintain the basic ecosystem services with the least land and provide full construction land for the city.It is an effective way towards the smart protection and smart growth.更多还原