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This research presents the application of an open source non-hydrostatic wave-flow model on simulating the dam-break flows over a triangular bottom sill, namely SWASH. The numerical results are compared with measured data obtained from the laboratory experiment which was conducted by S.Soares-Frazão (2007). | BÀI BÁO KHOA HỌC APPLICATION OF SWASH ON MODELING DAM-BREAK FLOW OVER A TRIANGULAR BOTTOM SILL Nguyen Trinh Chung1, Do Phuong Ha1, Nguyen Minh Viet2 Abstract: This research presents the application of an open source non-hydrostatic wave-flow model on simulating the dam-break flows over a triangular bottom sill, namely SWASH. The numerical results are compared with measured data obtained from the laboratory experiment which was conducted by S.Soares-Frazão (2007). On overall, the model reproduces the measured flow in the experiment very well. The propagated time and the water levels agree well with the results indicated in the experiment. The accurate simulation of the propagation process provides a good estimation of measured flow on the real experiment. The creaated reflex waves in the propagating procedure are also significantly captured. Keywords: SWASH, model, dam-break flows, laboratory experiment. 1. INTRODUCTION1 Recently, controlling of flood propagation flows which are normally caused by dambreaking has attracted the attention of many scientists for the river training and exploitation solutions. In real life, the occurrences of dambreaking are not expected. However, in order to enhance abilities to respond to such disasters, the laboratory experiments about this phenomena are critical important for further information. Previously, there were several efficient experiments on this type of water propagation flows such as Lauber and Hager reported their experiments on dam-break flows in a horizontal and sloping channel (Lauber and Hager, 1998a, b). Other authors conducted an experiment in sloping channels, with slopes up to 120 (Nsom et al, 2000). One of the most typical experiments on this was proposed by S.Soares-Frazão which described the transformation of breaking waves over a triangular bottom sill (S.Soares-Frazão, 2007). On the overall, a dam-break type flow occurs, generating waves passing over the downstream sills. These downstream sills are, .