Numerical simulations of flow motion and deposition characteristics of granular debris flows

Lin Der-Guey (), Sen-Yen Hsu and Kuang-Tsung Chang

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2009, vol. 50, issue 3, 623-650

Abstract: Flow motion and deposition characteristics of debris flows are of concern regarding land use planning and management. A simple model for the prediction of mentioned characteristics has been developed, incorporating a friction–collision rheological model. It demonstrated to be able to satisfactorily simulate the two-dimensional behavior of laboratory results and the one-dimensional behavior of two real debris-flow events. The numerical results show that the topography of the channel bed, the yield stress level of the debris flows, and the inflow pattern have significant influence on the simulated flow motion and deposition characteristics of debris flows. In addition, the predicted run-out distance has been compared with analytical solutions and field observations. The model could be employed for the preliminary evaluation of one-dimensional run-out distance of granular debris flows provided that the volume of the debris involved in the initial mobilization is assumed. Copyright Springer Science+Business Media B.V. 2009

Keywords: Granular debris flows; Flow motion; Deposition characteristics; Routing model (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1007/s11069-009-9371-6

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