NUMERICAL MODELING OF TSUNAMI RUNUP WITH DIFFERENT APPROACHES

摘要

To account for Tsunami runup in numerical models based on depth integrated equations the presence of dry computational nodes has to be treated somehow. Three different approaches to handle this problem are analyzed in this paper. Their performance is tested by means of a one- and a two-dimensional benchmark test. Furthermore the influence of Boussinesq terms on the shoaling and runup behavior of long waves is examined. Finally, to account for the flow resistance of trees or other obstacles an equivalent bottom friction is included in the numerical model and its influence on the maximum runup heights isanalyzed.