## THE THIRD INTERNATIONAL WORKSHOP ON LONG-WAVE RUNUP MODELS

June 17-18 2004
Wrigley Marine Science Center
Catalina Island, California

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# Benchmark Problem #4

TSUNAMI GENERATION AND RUNUP DUE TO A THREE-DIMENSIONAL LANDSLIDE

This problem requires the modeling of a sliding mass down a 1:2 plane beach slope and compares the predictions with laboratory data. Large-scale experiments have been conducted in a wave tank with a length 104 m, width 3.7 m, depth 4.6 m and with a plane slope (1:2) located at one end of the tank. A solid wedge was used to model the landslide. The triangular face has the following dimensions: a horizontal length of b = 91 cm, a vertical face a = 46 cm high and a width of w = 61 cm. The wedge was instrumented with an accelerometer to accurately define the acceleration-time history and a position indicator to independently determine the velocity- and position- time histories. The wedge traveled down the slope by gravity rolling on specially designed wheels (with low friction bearings) riding on aluminum strips with shallow grooves inset into the slope. A snapshot of the wedge motion is shown in the figure below.

A sufficient number of wave gages were used to determine the seaward propagating waves, the waves propagating to either side of the wedge, and for the submerged case, the water surface-time history over the wedge. In addition, the time history of the run-up on the slope was accurately measured. The modelers are asked to model the flow with the wedge starting from two different initial elevations, one submerged the other subaerial and will be given the block motions recorded. The modelers will have to provide time histories of surface elevation at selected locations in the channel and the shoreline motion. An animation of the results is encouraged. Modelers can use both 2 D and 3D codes.

For more information, please refer to Waves and run-up generated by a three-dimensional sliding mass, by Synolakis and Raichlen, in Submarine Mass Movements and Their Consequences, J. Loquat and J. Mienert Editors, Kluwer, 2003.

Download the wave gage data and run-up data:
run30_wave_gage_1.txt
run30_wave_gage_2.txt
run30_runup_gage_2.txt
run30_runup_gage_3.txt
run32_wave_gage_1.txt
run32_wave_gage_2.txt
run32_runup_gage_2.txt
run32_runup_gage_3.txt
(Left-click to view data, Right-click to download)

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