期刊
OCEAN MODELLING
卷 93, 期 -, 页码 40-55出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ocemod.2015.07.012
关键词
Landslide; Granular flow; Tsunami; Non-hydrostatic model; NHWAVE
资金
- National Tsunami Hazard Mitigation Program (NTHMP), National Weather Service [NA10NWS4670010, NA13NWS4670014, NA14NWS4670041]
- Department of Civil and Environmental Engineering, University of Delaware
- National Science Foundation [CMMI-1537100]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1537100, 1537568, 1537232] Funding Source: National Science Foundation
We develop and test a new two layer model for granular landslide motion and tsunami wave generation. The landslide is described as a saturated granular flow, accounting for intergranular stresses governed by Coulomb friction. Tsunami wave generation is simulated by the three-dimensional non-hydrostatic wave model NHWAVE, which is capable of capturing wave dispersion efficiently using a small number of discretized vertical levels. Depth-averaged governing equations for the granular landslide are derived in a slope-oriented coordinate system, taking into account the dynamic interaction between the lower-layer granular landslide and upper-layer water motion. The model is tested against an analytical solution for granular dam-break flow and 2D and 3D laboratory experiments on impulsive wave generation by subaerial granular landslides. Model results illustrate a complex interplay between the granular landslide and tsunami waves, and they reasonably predict not only the tsunami wave generation but also the granular landslide motion from initiation to deposition. (C) 2015 Elsevier Ltd. All rights reserved.
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