GIS和模糊相似贴近度在洪灾安置区评价中的应用

在模糊物元分析的基础上，结合模糊相似贴近度的概念，将基于模糊相似贴近度的模糊物元分析方法应用于洪水灾害避难安置区评价中，并根据GIS中图层叠加方法，利用各种约束条件对方案进行初选，剔除不符合条件的方案，提高了评价效率。在评价指标权重方面，采用层次分析法和熵值法相结合的方法计算各评价指标权重，克服了单一方法在实际应用中得到的可信度存在一定偏差的缺陷，提高了评价结果的精度和可信度。该评价模型被应用到上海市长兴岛的洪灾避难安置区选择综合评价中，取得了较好的效果。该评价模型的建立为防洪避迁决策提供了科学依据

APPLICATION OF GIS AND FUZZY SIMILARITY NEARNESS DEGREE IN EVALUATION OF FLOOD CONTROL RESETTLEMENT AREAS

In combination with the concept of similarity nearness degree,fuzzy similarity nearness degree matter-element model was applied to evaluate the flood control evacuation resettlement area projects based on the fuzzy matter-element analysis.According to GIS in flood disaster evacuation system,the projects that satisfy some limited conditions were selected through the overlay algorithm of hierarchical maps in GIS,with the evaluation efficiency improved.AHP and entropy method were combined together as synthetical evaluation index,which overcame the problem of dependability produced by single method in practice.The model was applied to evaluate the flood disaster evacuation resettlement area in Changxingdao Island of Shanghai,and a good effect was observed.The evaluation model will then serve as a scientific base for decision making in flood control evacuation.