Slope hazard induced by heavy rain in 2003, Minamata City, Kumamoto

Iwao, Yushiro

doi:10.3313/jls.40.3_239

Cited by 4 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On 19-20 July 2003, a short duration of high intensity rainfall event impacted on Minamata City in the Kumamoto prefecture, Japan. This rainstorm triggered many landslides and debris flows (Nakazawa et al, 2003;Iwao, 2003;Taniguchi, 2003;Mizuno et al, 2003;Hashimoto et al, 2003). The landslide and resultant debris flow at Hogawachi was the largest and most damaging of the 20 July disasters in Minamata area (Fig.…”

Section: Simulation Of Real Debris Flow Eventmentioning

confidence: 99%

GIS-based two-dimensional numerical simulation of rainfall-induced debris flow

Wang

Esaki

2008

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. This paper aims to present a useful numerical method to simulate the propagation and deposition of debris flow across the three dimensional complex terrain. A depth-averaged two-dimensional numerical model is developed, in which the debris and water mixture is assumed to be continuous, incompressible, unsteady flow. The model is based on the continuity equations and Navier-Stokes equations. Raster grid networks of 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 continuity and momentum equations are solved numerically using the finite difference method. The numerical model is applied to simulate the rainfall-induced debris flow occurred in 20 July 2003, in Minamata City of southern Kyushu, Japan. The simulation reproduces the propagation and deposition and the results are in good agreement with the field investigation. The synthesis of numerical method and GIS makes possible the solution of debris flow over a realistic terrain, and can be used to estimate the flow range, and to define potentially hazardous areas for homes and road section.

show abstract

Section: Simulation Of Real Debris Flow Eventmentioning

confidence: 99%