A Depth-Integrated SPH Model for Debris Floods: Application to Lo Wai (Hong Kong) Debris Flood of August 2005

In this work an approach to representing debris floods and flows is proposed, based on a depth-integrated mathematical model and smooth particle hydrodynamics numerical technique. The main contributions of the present work are twofold: (a) an improved rheological Bingham model where solid fraction concentration can change as solids are entrained by the current and (b) implementation of boundary conditions describing the injection process of water from channel weirs into the domain. The model has been applied to the case of Lo Wai debris flood (Hong Kong, August 2005). Numerical results obtained with the proposed model are in reasonable agreement with field observation. Fil: Lin, Chuan. Hohai University; China Fil: Pastor, Manuel. Universidad Politécnica de Madrid; España Fil: Yague, Angel. Universidad Politécnica de Madrid; España Fil: Tayyebi, Saeid Moussavi. Universidad Politécnica de Madrid; España Fil: Stickle, Miguel Martin. Universidad Politécnica de Madrid; España Fil: Manzanal, Diego. Universidad Politécnica de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long". Universidad de Buenos Aires. Facultad de Ingeniería. Instituto de Tecnologías y Ciencias de la Ingeniería "Hilario Fernández Long"; Argentina Fil: Tongchun Li. National Engineering Research Center Of Water Resource; China Fil: Liu, Xiaoqing. National Engineering Research Center Of Water Resource; China