## Abstract

Debris flow is the gravity flow of water, clay, granular and rock mixtures and often triggered by torrential rains in mountainous areas. It is a catastrophic disaster that consists of grain-fluid mixtures and moves rapidly across three-dimensional terrain. Most debris flows move downslope as fluids. To predict the runout distance and extent of the hazard area of rainfall-induced debris flows, we proposed a depth-averaged two-dimensional mathematical model, in which the debris and water mixture is assumed to be uniform continuous, incompressible, unsteady Newtonian turbulence fluid. Based on mass balance equation and Navier-Stokes equations, the mathematical model is derived using the method of depth-integrated equations. The finite difference method is necessary to solve the all equations. Based on GIS, the two-dimensional mathematical model of debris flow can be used to estimate the flow range, the potentially dangerous homes and roads for hazard and risk analysis.

Original language | English |
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Pages (from-to) | 1237-1241 |

Number of pages | 5 |

Journal | Yantu Lixue/Rock and Soil Mechanics |

Volume | 28 |

Issue number | 6 |

Publication status | Published - Jun 1 2007 |

## All Science Journal Classification (ASJC) codes

- Civil and Structural Engineering
- Geotechnical Engineering and Engineering Geology
- Soil Science