A numerical model for predicting the effects of landslide-generated water waves
Raney, Donald C.; Butler, H. Lee.
Research ReportAbstract: A numerical model for the generation and propagation of landslide-generated water waves in reservoirs is developed. Only two-dimensional hydrodynamic quantities are obtained from the program; however, a pseudo three-dimensional effect is present since the three-dimensional geometry of an actual reservoir can be represented. The model provides an approach to the evaluation of the first wave crest that may result from potential landslide regions located on reservoirs. Arbitrary landslide volumes, reservoir depths, slide propagation velocity, slide shape, and initial and final location of the slide can be considered. The numerical results have been compared with experimental results obtained on a 1:120 undistorted scale model of Libby Dam and Lake Koocanusa in Montana. The numerical results for the height of the first wave crest and its time of arrival at various points in the reservoir are in good agreement with the experimentally measured values from the hydraulic model. Appendix A gives data requirements for the numerical model; Appendix B is an analysis of viscous drag and pressure drag coefficients; and Appendix C lists and defines symbols used in this report.
Hydraulics Laboratory (U.S.)Engineer Research and Development Center (U.S.)
Landslides; Mathematical models; Numerical models; Reservoirs; Water wave generation; Libby Dam; Kootenai River; Montana
Research report (U.S. Army Engineer Waterways Experiment Station) ; H-75-1.
Approved for public release; distribution is unlimited.