基于GIS和CF

您所在的位置:网站首页 地质模型怎么做图片 基于GIS和CF

基于GIS和CF

2024-07-14 06:56| 来源: 网络整理| 查看: 265

Abstract:

The evaluation method for the susceptibility of geological hazards has very important practical significance for the prevention and control of geological hazards. This paper takes Huangzhong County, Xining City, Qinghai Province as the research area to investigate the most suitable assessment method for the area’s geological hazard susceptibility. The results show that using seven evaluation factors (including elevation, slope, aspect, topographic undulation, distance from river, distance from fault, and engineering rock group) and the certainty factor and logistic regression model to evaluate the geological hazard susceptibility of Huangzhong County is suitable and reliable. Using the determinant coefficient and logistic regression model, we calculate the probability of geological hazard in each cell. Subsequently, we use the ROC curve and the AUC value to verify the classification accuracy of the model. The AUC value is 0.863, indicating that our method has good applicability for evaluating the susceptibility of geological disasters in the study area. The four factors of high-rise, aspect, distance from river, and engineering rock group have the most significant impacts on geological disasters in the study area. From the perspective of the spatial distribution of geological hazard susceptibility, extremely high and high susceptibility areas calculated using this method are mainly distributed in the low mountain and hilly areas on both sides of the Huangshui River and its main stream, while low susceptibility areas are mainly distributed in the northern and southern regions of the study area. From the perspective of geological hazard evaluation factors, high susceptibility areas are mainly distributed on loose alluvial strata and weak clastic rock strata 500 m away from the river.The research results indicate that the CF-Logistic regression model has strong reference value for evaluating the susceptibility of geological hazards in the study area and can provide theoretical and methodological basis for the prevention and control of geological hazards in the study area.



【本文地址】


今日新闻


推荐新闻


CopyRight 2018-2019 办公设备维修网 版权所有 豫ICP备15022753号-3