基于属性识别模型的区域土地生态安全评价——以徐州市为例

REGIONAL LAND ECOLOGICAL SECURITY EVALUATION BASED ON ATTRIBUTE RECOGNITION MODEL——CASE STUDY IN XUZHOU CITY

土地生态安全评价是土地生态安全研究的前提和基础,而目前土地生态安全评价的方法及评价标准尚处于探索中。以徐州市为例,根据PSR概念模型框架构建区域土地生态安全评价的指标体系,采用层次分析法结合信息熵法确定权重,运用属性识别模型,进行了区域土地生态安全评价方法的探索。结果表明2006年徐州市整体土地生态安全状况处于良好状态,下属县市也都处于良好状态,而市区则处于预警状态,土地生态安全状况较差,基本与当地的实际情况相符合。基于属性识别模型的评价方法能同时实现生态安全等级的分类和排序,在具有评价标准的生态系统综合评价中具有一定的应用价值。

The land ecological security appraisal is the premise and the foundation of the land ecological security research, but at present the method and the evaluation criteria of the appraisal are still in the exploration. Based on the PSR conceptual model frame, this article constructs the indicator system of the regional land ecological securi- ty appraisal, which using the unified method of the analytic hierarchy process and the information entropy to de- termine weights, and establishes the attribute recognition model to carry on the appraisal of the land ecological se- curity condition in Xuzhou city. The result reveals that in 2006 the entire Xuzhou city and the subordinate counties＇ land ecological security condition were both at the good state, but the urban district was at the warning condition and the land ecological security condition was bad, which match with the actual situation basically. The method based on the attribute recognition model could sort and rank the test objects according to their ecological security level, and be applied to the comprehensive evaluation of ecological systems which has the evaluation criteria.