The comprehensive assessment of severity degree of dam failure impact is an important part of dam risk evaluation and management.A comprehensive assessment model based on attribute interval recognition theory was established to analysze the ambiguity and uncertainty of the index system of dam failure impact,and the average efficient was used to transform the attribute interval measure into integrative attribute measure.Then the calculation formula for entropy weight was improved reasonably,and the favorable coefficients of subjective and objective weight were selected to get the combination weight.Finally,the rank and mark of the sample can be calculated by using the assurance criterion,grey close degree and the scoring rubrics.The practical application showed that this model is feasible and credible for the comprehensive evaluation of dam failure impact.
