天津滨海新区生态系统服务评估及空间分级

Assessment and spatial grading of ecosystem services of Tianjin Binhai New Area based on "function equivalent" model

采用提出的"功能当量"相对评估模型,并以RS和GIS为技术平台对2009年天津滨海新区生态系统服务功能进行评估,采用区域网格化空间表达,对研究区进行分级研究.结果表明,滨海新区生态系统单位面积服务功能当量大小依次为湿地、水体、林地、草地、耕地、裸地;2009年滨海新区生态系统服务功能当量总和为1068680.13,III级以上功能当量的单元格比例为71.22%,总体处于较高水平;通过与价值量法结果对比,得出利用"功能当量"相对评估模型对研究区的评估结果与价值量法的评估结果具有显著相关性,证明该评估模型的可行性和合理性.

The relative assessment model of ＂function equivalent＂ was proposed. Based on RS and GIS, the ecosystem services of Tianjin Binhai New Area in 2009 were assessed and the results of the ecosystem services fuction equivalent were classified and expressed in grid. The order of ecosystem services function equivalent in Binhai New Area （from the highest to the lowest ） were： wetland, water, forest, grassland, farmland, bare ground; the sum of the ecosystem services function equivalent of Binhai New Area in 2009 was 1068680.13, the ratio of function equivalent cells above Class Three was 71.22% .Generally, the ecosystem services function in Binhai New Area was relatively high. Finally, a comparison was made between the monetary value method and relative assessment method, there was a high correlation between the two methods. So feasibility and rationality of this relative assessment model was proved.