GIS-based numerical modelling of debris flow motion across three-dimensional terrain
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GIS-coupled numerical model of debris flow; a geohazard modeling contribution.
This study develops and applies a debris-flow simulation model to a geological case.
GIS numerical modelling of debris-flow motion; geohazard engineering, not research about research.
Résumé
Abstract The objective of this study is to incorporate a numerical model with GIS to simulate the movement, erosion and deposition of debris flow across the three dimensional complex terrain. In light of the importance of erosion and deposition processes during debris flow movement, no entrainment assumption is unreasonable. The numerical model considering these processes is used for simulating debris flow. Raster grid networks of a digital elevation model in GIS provide a uniform grid system to describe complex topography. As the raster grid can be used as the finite difference mesh, the numerical model is solved numerically using the Leap-frog finite difference method. Finally, the simulation results can be displayed by GIS easily and used to debris flow evaluation. To illustrate this approach, the proposed methodology is applied to the Yohutagawa debris flow that occurred on 20th October 2010, in Amami-Oshima area, Japan. The simulation results that reproduced the movement, erosion and deposition are in good agreement with the field investigation. The effectiveness of the dam in this real-case is also verified by this approach. Comparison with the results were simulated by other models, shows that the present coupled model is more rational and effective.
Conservé avec la notice de tri, où il sert de preuve aux étiquettes ci-dessus.
La notice
- Revue
- Journal of Mountain Science
- Thématique
- Landslides and related hazards
- Domaine
- Environmental Science
- Établissements canadiens
- —
- Organismes subventionnaires
- Japan Society for the Promotion of ScienceUniversity of British ColumbiaChina Scholarship Council
- Mots-clés
- Raster graphicsDebris flowDigital elevation modelGridTerrainDebrisErosionDeposition (geology)Flow (mathematics)Entrainment (biomusicology)GeologyComputer simulationRaster dataComputer scienceGeotechnical engineeringSimulationRemote sensingGeodesyGeomorphologyGeometryComputer graphics (images)GeographyMathematicsSedimentAcousticsCartography
- Résumé présent dans OpenAlex
- oui