The objective of this workshop is to identify key physical factors that are important to tsunami hydrodynamics. Prior to the workshop, various modeling groups will simulate a hypothetical Cascadia Subduction Zone earthquake event, specifically the problem of tsunami propagation along the Columbia River. Participants will examine and discuss results from models based on non-dispersive and weakly dispersive shallow-water theory, as well as higher-order theory.

Gathered researchers and practictioners to discuss the interaction between simulation and large-scale testing for understanding nearshore wave dynamics. Included a Nearshore Wave Benchmark Challenge, where modelers compared results from simulating two beach setups with empirical results obtained from tests in the NEES Tsunami Wave Basin.

Gathered researchers in tsunami sediment transport, erosional features, and other sedimentological aspects of tsunamis and tsunami deposits. Included modeling approaches, sampling strategies, and comparisons of tsunami deposits with those from storms, floods, and turbidity currents.

Reviewed and re-evaluated fundamental theories and analyses of the coastal effects of tsunami, principally (a) mechanics of fluid and debris-impact forces on man-made and natural objects, and (b) mechanisms and mathematical analysis for tsunami scour, sediment transport, and deposit.

Discussed key issues of accuracy for long-wave runup models: calculations of the moving shoreline; modeling of bathymetry and topography; landslide generated tsunami; and tsunami forces on a nearshore structure.

Discussed scenario simulation (case studies) where tsunami effects are simulated comprehensively, integrating not only tsunami generation, propagation, runup motion, and flow-structure interactions, but also other factors such as warning transmission to the public, evacuation, environmental impacts, rescue tactics, and short-term and long-term recovery strategies.

Gathered researchers in tsunami sediment transport, erosional features, and other sedimentological aspects of tsunamis and tsunami deposits. Included modeling approaches, sampling strategies, and comparisons of tsunami deposits with those from storms, floods, and turbidity currents.