The following papers have been accepted but have not been finalized (proof reading) yet.
«« Back

The Use of Dam Break Model to Simulate Tsunami Run-up and Scouring around a Vertical Cylinder
Author(s): Kuswandi Kuswandi, Radianta Triatmadja
Keywords: Dam break, Run-up, Run-down, Tsunami, Scour, Simulation
This research dealt with the use of a dam break system to generate surge model to study tsunami run-up, run-down and scouring around a vertical cylinder. The dam break system was provided with one or two gates to store water at predefined depth which was quickly released by opening the gates to create tsunami surge that run-up on land. In addition, numerical simulations of dam break surge resulted from various length of reservoirs were conducted to obtain more findings for further analysis regarding the characteristics of the dam break surges. A vertical cylinder model was installed at the beach 6 m downstream of the main gate to study the scour due to tsunami surge. The bed material was fine sand of 0.19 mm in diameter. The results were compared with existing experimental results. The comparison indicated that the dam break surge can be used to simulate tsunami surge by adjusting the reservoir length, depth and the water depth downstream of the gate. Although different in magnitude, the shape of both the surge mareogram and the velocity time history of the tsunami surge generated using dam break system was comparable with the tsunami surge induced by solitary wave generated using a long flume. For relatively large cylinder located at the bore location, the separation flow was strongly directed to the wall which produced significantly unsymmetrical scour result.