Abstract
To predict the ran out distance and extent of the hazard area of rainfall-induced debris flows, we proposed a depth-averaged two-dimensional numerical model, in which the debris and water mixture is assumed to be a uniform continuous, incompressible, unsteady Newtonian turbulence fluid. As raster grid networks of digital elevation model in GIS can be used as the finite difference mesh, the continuity and momentum equations are solved numerically using the finite difference method. All the input data and output are processed in GIS. The model is applied to simulate the rainfall-induced real debris flow of July 20, 2003, in Minamata City of southern Kyushu, Japan. The simulation reproduces the propagation of the real debris flow; and the results are in good agreement with the field investigation. The two-dimensional numerical simulation using GIS can be used to estimate the potentially inundated areas, the potentially dangerous homes and roads for hazard and risk analysis.
| Original language | English |
|---|---|
| Journal | Yantu Lixue/Rock and Soil Mechanics |
| Volume | 28 |
| Issue number | 7 |
| Publication status | Published - Jul 2007 |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology
- Soil Science
Cite this
GIS-based two-dimensional numerical simulation of debris flow. / Wang, Chun Xiang; Bai, Shi Wei; Esaki, Tetsuro; Mitani, Yasuhiro.
In: Yantu Lixue/Rock and Soil Mechanics, Vol. 28, No. 7, 07.2007.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - GIS-based two-dimensional numerical simulation of debris flow
AU - Wang, Chun Xiang
AU - Bai, Shi Wei
AU - Esaki, Tetsuro
AU - Mitani, Yasuhiro
PY - 2007/7
Y1 - 2007/7
N2 - To predict the ran out distance and extent of the hazard area of rainfall-induced debris flows, we proposed a depth-averaged two-dimensional numerical model, in which the debris and water mixture is assumed to be a uniform continuous, incompressible, unsteady Newtonian turbulence fluid. As raster grid networks of digital elevation model in GIS can be used as the finite difference mesh, the continuity and momentum equations are solved numerically using the finite difference method. All the input data and output are processed in GIS. The model is applied to simulate the rainfall-induced real debris flow of July 20, 2003, in Minamata City of southern Kyushu, Japan. The simulation reproduces the propagation of the real debris flow; and the results are in good agreement with the field investigation. The two-dimensional numerical simulation using GIS can be used to estimate the potentially inundated areas, the potentially dangerous homes and roads for hazard and risk analysis.
AB - To predict the ran out distance and extent of the hazard area of rainfall-induced debris flows, we proposed a depth-averaged two-dimensional numerical model, in which the debris and water mixture is assumed to be a uniform continuous, incompressible, unsteady Newtonian turbulence fluid. As raster grid networks of digital elevation model in GIS can be used as the finite difference mesh, the continuity and momentum equations are solved numerically using the finite difference method. All the input data and output are processed in GIS. The model is applied to simulate the rainfall-induced real debris flow of July 20, 2003, in Minamata City of southern Kyushu, Japan. The simulation reproduces the propagation of the real debris flow; and the results are in good agreement with the field investigation. The two-dimensional numerical simulation using GIS can be used to estimate the potentially inundated areas, the potentially dangerous homes and roads for hazard and risk analysis.
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M3 - Article
AN - SCOPUS:34547637646
VL - 28
JO - Yantu Lixue/Rock and Soil Mechanics
JF - Yantu Lixue/Rock and Soil Mechanics
SN - 1000-7598
IS - 7
ER -