生态敏感性的灰色关联投影评价模型及其应用

Grey relation projection model for the ecological sensitivity.

生态敏感性分析是生态城市规划的基础分析和重要的规划依据,但是由于评价所涉及的地域复杂性和因素多样性,许多评价方法和体系仍处于不断探索和发展之中.生态环境系统是一个灰色系统,包括了许多具有信息不确知性和不完全性的因素.基于灰色系统理论和矢量投影原理,建立了生态敏感性分析的灰色关联投影模型.该模型将评价样本及各级质量标准视为矢量,分别向同一矢量(理想样本)进行投影.根据投影值的大小,确定样本所属的敏感性级别及样本间的优劣排序.本文以安吉为例,在建立生态敏感性评价指标体系和标准的基础上,运用所建模型对生态敏感性进行了评价.研究表明,灰色关联投影模型对于多指标的生态敏感性分析是科学的、有效的,具有一定的推广和实用价值.

Ecological sensitivity analysis is an important foundation of ecological city planning. Because of the complexity and relative factors diversity in a region, many evaluation methods are being gradual explored and improved. Environment system is almost a grey system owing to the unascertained and imcomplete information of relative factors. A grey relation projection model for ecological sensitivity analysis was established based on grey system theory and vector projection principle. In the model, evaluated samples and classified standards were treated as vector, which projected on the same ideal samples. Then, evaluated samples were classified and arranged according to the projective value. As a case, the grey relation projection model, based on the established criteria and standards of ecological sensitivity evaluation , was used to assess the ecological sensitivity of Anji County. The result shows that this model is scientific and effective for ecological sensitivity evaluation.