文章浏览阅读55次。本文基于A流域65km河道洪水模拟案例，系统阐述HEC-RAS中稳定流与非稳定流的协同建模流程：先以稳定流校核地形、糙率及断面参数，再迁移至非稳定流开展洪水过程演进模拟。重点涵盖DEM预处理、断面布设原则、糙率分区策略、边界条件设定、Courant数控制、热启动初始条件、干湿 ...

本文围绕HEC-RAS在防洪评价中的核心实践，系统阐述稳定流与非稳定流的适用场景判别逻辑、几何构建关键要点（含DEM预处理、断面切割与无效流动区设置）、边界条件与曼宁系数分区取值方法、非稳定流数值稳定性调控（时间步长、Theta系数、结构物收敛）、以及从报错日志出发的标准化排查链路 ...

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Lana Millard Waneka is a water resources engineer at RTI. She specializes in hydrologic forecasting, hydrologic and hydraulic modeling, and flood-risk assessment to support operational and long-term ...