屋顶绿化的生态效应评估研究

在屋顶绿化领域中开展生态效应评估研究,以层次分析法为主体,采用特尔斐法(Delphi Technique)对屋顶绿化的定性资料进行收集;定量资料的收集则运用遥感技术和地理信息系统(GIS)相结合的方法,使资料收集和整理的速度、精确度都大大提高,为屋顶绿化生态评估的定量化分析奠定了基础;同时确定各项指标的权重。单项指标的量化采用指数加权评估统计方法。在此基础上,对收集到的数据进行规范化的处理,用多元分析方法进一步对这些数据各自作用的大小、相互作用的关系进行综合归纳,系统分析,整合评估。以定性分析为主、定量分析为辅,对屋顶绿化生态效应的评估对象作出全局性、整体性的评价。

Evaluation of Ecological Effect of Roof Greening

To evaluate ecological effect of roof greening, AHP and Delphi Technique were adopted to collect qualitative data of roof greening, RS and GIS to collect quantitative data. These techniques greatly promote the rate and precision of data collection and processing, and lay a founda- tion for quantitative analysis of roof greening evaluation. Moreover, weights of all indexes were specified. Exponential weighting statistical evalua- tion was applied for quantification of single index. On this basis, the collected data were standardized and their role and interaction were analyzed by using multivariate method, integrated and evaluated. Evaluation objects of roof greening ecological effect were appraised comprehensively through qualitative analysis （dominant） and quantitative analysis （secondary）.