Topographic Data and Numerical Debris-Flow Modeling
Topographic Data and Numerical Debris-Flow Modeling
复制标题
地形数据和泥石流数值模拟
DOI：
10.1007/978-3-642-31325-7_75
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Mikoš
中科院分区：
文献类型：
--
作者：
Jost Sodnik;T. Podobnikar;Urška Petje;M. Mikoš
The digital elevation models (classical DEM 5 and DEM 12.5), publically available in Slovenia, have been evaluated as a basis to prepare numerical square grids 5 × 5 m for 2D modeling of possible debris flows on torrential fans, using the model Flo-2D. Also recently available LiDAR data in their original resolution have been used, as well as their decreased resolution to the one of the numerical grid (e.g. 5 × 5 m). From our numerical results it seems obvious that the use of more precise LiDAR data over classical DEMs for numerical debris-flow modeling is fully justified. Better quality of input topographic data assures higher accuracy of results and therefore also accuracy of hazard maps produced in such a way. The LiDAR data promises better representation of torrential channels on torrential fans (narrow, deep channels) and computed results (velocities, depths) are generally better estimated. Using more precise data also increases computational times compared to using classical DEMs.
