基于加权信息量法的涞水县地质灾害易发性评价

Evaluation of Geological Hazard Susceptibility in Laishui County Based on Weighted Information Method

对涞水县全域开展地质灾害易发性评价研究,选取9个评价因子分别为高程、坡度、坡向、构造、水系、地形起伏度、地貌、岩性和植被覆盖度,引入加权信息量模型,根据模型中计算公式得出相应的加权信息量值,对涞水县内地质灾害易发性进行评估,本结果将研究区域划分成三个级别,依次为低易发区、中易发区及高易发区。引入ROC曲线及AUC指标,证明了评价结果的精度为74.74%。该评价方法可以为本区域地质灾害防治工作提供一定的科学依据。

Geological hazard susceptibility evaluation research is carried out by taking the whole Laishui county as the study area.The nine evaluation factors of elevation,slope,aspect,structure,river,topographic undulation,landform,lithology and vegetation coverage are selected and the weighted information model is introduced.On this basis,we obtained the corresponding weighted information value according to the calculation formula in the model,and evaluated the susceptibility of geological disasters in Laishui county.As the result indicates,the study area is divided into three levels,namely high-,moderate-and low-susceptibility areas.By introducing ROC curve and AUC index,it is proved that the accuracy of the evaluation result is 74.74%.This evaluation method can provide a certain scientific basis for the prevention and control of geological disasters in the region.