灾害学2024，Vol.39Issue(4)：200-206,227,8.DOI:10.3969/j.issn.1000-811X.2024.04.029
关中平原与黄土高原过渡带地质灾害危险性耦合评价模型研究——以渭南市富平县为例
A Coupled Model for Geological Hazard Risk Assessment in the Transition Zone between the Guanzhong Plain and the Loess Plateau
摘要
Abstract
Fuping County is located in the transition zone between Guanzhong Plain and Loess Plateau,and its geomorphology is complex and varied,which makes it difficult for a single evaluation model to evaluate the suscepti-bility and hazard in this area.Taking Fuping County as the study area,and selecting eight evaluation factors as eleva-tion,slope,slope direction,degree of relief,distance from river,tectonic fracture,stratigraphic and slope type,the study area is divided into four evaluation zones according to geomorphological conditions;the optimal evaluation factors for the different evaluation zones are screened out using the method of significance and independence,and then a coupling model for evaluating the susceptibility to geologic hazards is constructed by combining the logistic re-gression method and the information value model;ROC curve is adopted to analyze the overall assessment of geolog-ic hazards and the risk assessment.The coupling model is constructed;the ROC curve is used to compare the accura-cy of the overall and sub-regional geohazard susceptibility evaluation results,and the AUC values are 0.842 and 0.893,which indicated that the sub-regional evaluation results are more accurate;the comprehensive geohazard susceptibility evaluation results are combined with the rainfall data,and the geohazard hazard evaluation is carried out for the study area,and the results of the evaluation divided the study area into four subzones:very high hazard area,high hazard area,medium hazard area,and low hazard area.The results of the evaluation classified the study area into four zones:very high hazard zone,high hazard zone,medium hazard zone and low hazard zone,with the very high hazard zone mainly distributed in the northern and northwestern low hills of the study area.The results of the study can provide scientific basis for the prevention and control of geologic hazards in Fuping County.关键词
地质灾害/危险性评价/耦合模型/逻辑回归法Key words
geological hazards/risking evaluation/coupled model/logistics regression分类
资源环境引用本文复制引用
王昱琛,谢婉丽,高帅,刘欣鹏,薛芬芬..关中平原与黄土高原过渡带地质灾害危险性耦合评价模型研究——以渭南市富平县为例[J].灾害学,2024,39(4):200-206,227,8.基金项目
国家自然科学基金项目"基于微观尺度的黄土湿陷耦合模型研究"(41972292)、"降雨诱发黄土挖方边坡多尺度灾变演化机理及其破坏模式"(42372320) （41972292）
陕西省创新能力支撑计划"地质灾害防控数字化研究创新团队"(2021TD-54) （2021TD-54）
陕西省重点研发计划"黄土高原地区边坡失稳机制及绿色生态治理修复技术研发"(2022ZDLSF06-03) （2022ZDLSF06-03）
