长株潭城市群生态安全综合评价

Ecological Security Assessment of Changsha-Zhuzhou-Xiangtan Urban Agglomeration

结合长株潭城市群区域环境特点及社会、经济发展状况,以2005年、2010年和2014年为评价年,采用模糊综合评价法对长株潭生态安全进行评价,结果表明:长株潭城市群生态安全状况总体上不容乐观,但可持续发展水平在不断提高;研究区域中,长沙县及长株潭3市市区的生态安全水平相对较高,而望城县、湘潭县及株洲县生态安全水平相对较低.运用因子分析法对影响生态安全的主要因子进行分析,土壤重金属面积比例、人口密度、人均水资源占有量、景观破碎度等指标的影响较大,针对评价结果,提出了对策和建议.评价结果与实际情况基本相符合,为其他城市群的生态安全评价可提供借鉴.

On the basis of environmental profiles and development conditions of social and economic characteristics,with year 2005,2010 and 2014 as examples,we systematically evaluated the ecological security of ChangSha-Zhu Zhou-Xiang Tan urban agglomeration with fuzzy comprehensive evaluation method. Our results show that the ecological security condition of this agglomeration is not optimistic in general,though sustainable development level constantly improved. In the regional study,we found that Changsha country,Changsha,Zhuzhou and Xiangtan have relatively high levels of ecological security while Wangcheng country,Xiangtan country and Zhuzhou country are low. From the analysis of major factors effecting ecological security by factor analysis method,we unveiled that the proportion of soil heavy metal area,population density,per capita water resources and landscape fragmentation index are most significant. Suggestions and measures have been proposed according to the above analysis. Generally speaking,evaluation results are in good agreement with the actual situations. We believe that our analysis method can be used for ecological security evaluation in other urban agglomerations.