Performance Assessment of NAMI DANCE in Tsunami Evolution and Currents Using a Benchmark Problem

Velioglu, Deniz
Kian, Rozita
Yalçıner, Ahmet Cevdet
Zaytsev, Andrey
Numerical modeling of tsunami evolution, propagation, and inundation is complicated due to numerous parameters involved in the phenomenon. It is important to assess the performance of numerical codes that solve tsunami motion, as well as flow and velocity patterns. NAMI DANCE is a computational tool developed for the modeling of long waves. It provides numerical modeling and efficient visualization of tsunami generation, propagation, and inundation mechanisms and computes the tsunami parameters. In the theory of long waves, the vertical motion of water particles has no effect on the pressure distribution. Based upon this approximation and neglecting vertical acceleration, the equations of mass conservation and momentum are reduced to two-dimensional depth-averaged equations. NAMI DANCE uses finite difference computational method to solve linear and nonlinear forms of depth-averaged shallow water equations in long wave problems. In this study, NAMI DANCE is applied to a benchmark problem which was discussed in the 2015 National Tsunami Hazard Mitigation Program (NTHMP) annual meeting in Portland, USA. The benchmark problem features a series of experiments in which a single solitary wave propagates up a triangular shaped shelf which has an offshore island feature. The problem provides detailed free surface elevation and velocity time series in the vicinity of the island. The comparison of the results showed that NAMI DANCE is able to satisfactorily predict long wave evolution, propagation, amplification, and tsunami currents.


Time-space fractional governing equations of transient groundwater flow in confined aquifers: Numerical investigation
Tu, Tongbi; Ercan, Ali; Kavvas, M. Levent (2018-05-01)
In order to model non-Fickian transport behaviour in groundwater aquifers, various forms of the time-space fractional advection-dispersion equation have been developed and used by several researchers in the last decade. The solute transport in groundwater aquifers in fractional time-space takes place by means of an underlying groundwater flow field. However, the governing equations for such groundwater flow in fractional time-space are yet to be developed in a comprehensive framework. In this study, a finit...
Long wave runup on piecewise linear topographies
Kanoğlu, Utku (1998-11-10)
We study long-wave evolution and runup on piecewise linear one- and two-dimensional bathymetries analytically and experimentally with the objective of understanding certain coastal effects of tidal waves. We develop a general solution method for determining the amplification factor of different ocean topographies consisting of linearly varying and constant-depth segments to study how spectral distributions evolve over bathymetry, and apply our results to study the evolution of solitary waves. We find asympt...
Analytical solutions of shallow-water wave equations
Aydın, Baran; Kanoğlu, Utku; Department of Engineering Sciences (2011)
Analytical solutions for the linear and nonlinear shallow-water wave equations are developed for evolution and runup of tsunamis –long waves– over one- and two-dimensional bathymetries. In one-dimensional case, the nonlinear equations are solved for a plane beach using the hodograph transformation with eigenfunction expansion or integral transform methods under different initial conditions, i.e., earthquake-generated waves, wind set-down relaxation, and landslide-generated waves. In two-dimensional case, th...
Sharghivand, Naeimeh; Aşık, Mehmet Zülfü; Department of Engineering Sciences (2022-8-11)
In this study, the N-wave profile is fitted to the seafloor deformation for a large set of earthquake scenarios, i.e., assuming that the seafloor deformation resulting from an earthquake instantaneously transfers to the sea surface. Hence, the N-wave parameters are identified with respect to the earthquake source parameters allowing to express the initial tsunami profile in terms of the earthquake source parameters. Then, the maximum tsunami runup is presented through the earthquake fault plane parameters u...
Climatic controls on biophysical interactions in the Black Sea under present day conditions and a potential future (A1B) climate scenario
Cannaby, Heather; Fach Salihoğlu, Bettina Andrea; Arkin, Sinan S.; Salihoğlu, Barış (2015-01-01)
A dynamical downscaling approach has been applied to investigate climatic controls on biophysical interactions and lower trophic level dynamics in the Black Sea. Simulations were performed under present day conditions (1980-1999) and a potential future (2080-2099) climate scenario, based on the Intergovernmental Panel for Climate Change A1B greenhouse gas emission scenario. Simulations project a 3.7 degrees C increase in SST, a 25% increase in the stability of the seasonal thermocline and a 37 day increase ...
Citation Formats
D. Velioglu, R. Kian, A. C. Yalçıner, and A. Zaytsev, “Performance Assessment of NAMI DANCE in Tsunami Evolution and Currents Using a Benchmark Problem,” JOURNAL OF MARINE SCIENCE AND ENGINEERING, pp. 0–0, 2016, Accessed: 00, 2020. [Online]. Available: