基于改进物元可拓模型的城市洪灾风险评价

发布时间：2018-01-04 00:17

  本文关键词：基于改进物元可拓模型的城市洪灾风险评价　出处：《人民黄河》2017年07期 　论文类型：期刊论文

  更多相关文章： 城市洪灾 风险评价 物元可拓模型 变权理论 贴近度

【摘要】：城市洪灾风险评价是城市制定防洪减灾措施的重要依据,为了克服现有评价模型的局限性,从灾害学的角度考虑,从致灾、孕灾、承灾和减灾4个方面建立了城市洪灾风险评价指标体系,并采用改进物元可拓模型进行分析评价。该模型在一般的物元可拓模型的基础上作出两点改进:其一,用贴近度代替关联度进行等级评定;其二,采用变权法确定指标权重。以丽水市为例进行洪灾风险评价,评价结果为Ⅳ级(较危险),与丽水市实际洪灾风险情况基本相符。
[Abstract]:Urban flood risk assessment is an important basis for cities to formulate flood control and disaster mitigation measures. In order to overcome the limitations of existing evaluation models, from the perspective of disaster science, from the disaster, disaster prevention. The evaluation index system of urban flood risk is established in the four aspects of disaster bearing and disaster reduction, and the improved matter-element extension model is used to analyze and evaluate it. The model is improved on the basis of the general matter-element extension model: first. Using the closeness degree instead of the correlation degree to evaluate the grade; Secondly, the index weight is determined by variable weight method. Taking Lishui City as an example, flood risk assessment is carried out, and the evaluation result is grade 鈪，

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