持续强降雨天气下地质危险区灾害特征提取

采用当前方法在持续强降雨环境下提取地质危险区的灾害特征时,不能准确的计算特征因子对应的权重,提取到的特征精准度较低。基于此,提出持续强降雨天气下地质危险区灾害特征提取方法,选取坡度、起伏度、地表切割密度、地表切割深度、河网密度、植被因子和降雨因子作为持续强降雨天气下地质危险区的灾害特征因子。基于专家权重系数通过群组AHP聚类分析法计算个体差异系数和群体一致度系数,采用线性加权法结合个体差异系数和群体一致度系数获得特征因子对应的最终权重,选取权重较高的特征因子作为地质危险区的灾害特征,实现持续强降雨天气下地质危险区灾害特征的提取。实验结果表明,所提方法可准确的计算特征因子对应的权重,特征提取精准度高。

Study on Disaster Feature Extraction in Geological Hazard Area under Continuous Heavy Rainfall

The current method can not accurately calculate the corresponding weight of the characteristic factors when extracting the disaster characteristics of geological hazard areas under the continuous heavy rainfall environment, and the accuracy of the extracted features is low. Based on this, a method to extract the hazard characteristics of geological hazard zones under continuous heavy rainfall is proposed. Slope, fluctuation, surface cutting density, surface cutting depth, river network density, vegetation factor and rainfall factor are selected as the hazard characteristics of geological hazard zones under continuous heavy rainfall. Based on expert weight coefficient, individual difference coefficient and group consistency coefficient are calculated by group AHP clustering analysis method. The final weight corresponding to characteristic factors is obtained by combining individual difference coefficient and group consistency coefficient with linear weighting method. Higher weighted characteristic factors are selected as disaster characteristics of geological hazard areas to achieve the purpose of holding. Extraction of disaster characteristics in geological hazard areas under continuous heavy rainfall weather. The experimental results show that the proposed method can accurately calculate the corresponding weights of feature factors, and the accuracy of feature extraction is high.