基于模糊综合评价法和熵值法的泥石流危险度评价

Risk Evaluation of Debris Flow Based on Fuzzy Comprehensive Evaluation and Entropy Method

泥石流危险度评价是当前国内外地质工程领域的重要研究方向之一,也是泥石流研究中的重点与难点。本文将模糊综合评价法与熵值法相结合,选取了流域面积、主沟长度、流域最大相对高差、主沟纵坡降、泥石流最大冲出量、松散物储量、植被覆盖率、24h最大降雨量8个影响因素作为评价因子,建立了模糊综合评价模型,对岷县的8条泥石流沟进行了危险度评价。结果表明:评价结果与实际情况基本吻合,从而验证了该方法在泥石流危险度评价中的合理性和可靠性。

Debris flow risk assessment is an important research direction in geological engineering field at home and abroad in current years, and it is also important and difficult in the study of debris flow. This pa- per establishes a model based on fuzzy comprehensive evaluation and entropy method and chooses 8 evalua- tion factors, such as the basin area, the length of the main gully, the relatively maximum elevation differ- ence in the basin, the longitudinal slope of the main gully, the maximum volume of debris flow and so on, to evaluate the risks of 8 debris flow gullies in Min County. The results show that evaluation results are consistent with the actual situation and the method is rational and valid in the risk evaluation of debris flow.