中国地质灾害与防治学报2025，Vol.36Issue(6)：95-106,12.DOI:10.16031/j.cnki.issn.1003-8035.202503035
基于FLO-2D的甘肃岷县扎龙沟泥石流灾害风险评价
Risk assessment of debris flow disaster in Zhalong gully,Minxian County,Gansu Province based on the FLO-2D model
摘要
Abstract
Debris flows pose a serious threaten to human safety and ecological stability due to their sudden onset and destructive power.Zhalong gully in Min County,Gansu Province,is prone to frequent debris flow events,highlighting the need for disaster prevention and early warning.Based on the FLO-2D numerical simulation model,rainfall intensity data with return periods of 10 a,20 a,and 50 a were selected.Combined with a high-precision digital elevation model(DEM)and debris flow parameters determined by field investigation,the movement process of debris flow(flow velocity,flow depth,and range)under different rainfall return periods was simulated,and disaster risk zoning was conducted.Buildings,roads,and land within the affected area were selected for vulnerability assessment,and a risk zoning map was generated by combining the results with a risk assessment model.With the increase of rainfall intensity,the peak flow,flow velocity,and flow depth of debris flow increased significantly,and the hazard was the highest under the 50 a return period rainfall.High-risk areas were concentrated in downstream accumulation zones,and the increase in rainfall intensity raised the risk for buildings in low-risk areas.The results of this study are of great significance for debris flow disaster prevention,early warning,and risk management,and provide a foundation for subsequent research on precise and quantitative risk assessment methods.关键词
地质灾害/FLO-2D/风险评价/泥石流/数值模拟/易损性Key words
geological disaster/FLO-2D/risk assessment/debris flow/numerical simulation/vulnerability分类
天文与地球科学引用本文复制引用
张燕,毕远宏,魏洁,冯振,陈亮,田怡帆,刘明学,侯圣山..基于FLO-2D的甘肃岷县扎龙沟泥石流灾害风险评价[J].中国地质灾害与防治学报,2025,36(6):95-106,12.基金项目
国家重点研发计划项目(2023YFC3007205) （2023YFC3007205）
中国地质调查局地质调查项目(DD20230600202) （DD20230600202）
