Tsunami hydrodynamics in coastal zones

Özer, Ceren
This study analyzes the parameter “hydrodynamic demand” that is also defined by the square of Froude Number representing the damage of tsunami waves on structures and coastlines, and other hydrodynamic parameters, i.e., the distribution of instantaneous flow depths, runup values and the direction of maximum currents, occurred during tsunami inundation by using advanced numerical modeling. The analyses are performed on regular-shaped basins with different bottom slopes and real-shaped topographies using different wave shapes, wave periods and types. Various orientation and amount of coastal and land structures are used in simulations to have results for many different cases. This study provides the opportunity to define the damage of level in residential areas and to test the performance of coastal protection structures. The behavior of tsunami hydrodynamic parameters in shallow and inundation zone is investigated and a correlation is obtained between the average maximum values of square of Froude Number with the wave characteristics and sea bottom slope. After determining hydrodynamic parameters in regular shaped basins, a case study is applied by modeling the March 11, 2011 Great East Japan Tsunami with finer resolution in nested domains. The determination of hydrodynamic parameters in inundation zone during 2011 Japan event is performed in one of the most damaged coastal city Kamaishi.


Assessment of tsunami resilience of ports by high resolution numerical modeling: a case study for Haydarpasa port in the sea of Marmara
Aytöre, Betül; Yalçıner, Ahmet Cevdet; Department of Civil Engineering (2015)
Assessment of tsunami resilience is used to determine proper mitigation strategies. Thus, it is essential to obtain modeling results in highest confidence and accuracy. Haydarpasa Port in the Sea of Marmara is selected for tsunami assessment study due to vulnerable nature of ports against marine related disasters. The region also tends to have tsunamis since it is located on the western part of the North Anatolian Fault zone where 35 tsunamis occurred in last 2000 years. The aim of this study is assessment ...
Long waves In narrow enclosed basins
Tekin, Onur Baran; Yalçıner, Ahmet Cevdet; Department of Civil Engineering (2012)
In this study, numerical modeling of landslide generated tsunami waves in closed basins and their mechanisms are presented. Historical landslide generated tsunamis are investigated and also the governing parameters affecting impulse wave parameters are studied. The numerical model is based on the solution of nonlinear form of the long wave equations with respect to related initial and boundary conditions. In order to validate the outputs of the modeling by NAMIDANCE, empirical formulation is applied to the ...
Tsunami induced wave and current amplification and sedimentation in closed basins
Kian, Rozita; Yalçıner, Ahmet Cevdet; Department of Civil Engineering (2015)
Wave and current amplification inside the basins are related to different parameters. Wave period is one of the important parameters which governs the amplification inside the basins. If the period of incident wave coincides with one of the periods of free oscillations in the basin then resonant oscillation and amplification happens. Resonance inside harbors due to tsunami waves can exacerbate the damages by amplifying the water level changes, and currents. This phenomenon is important and cause unexpected ...
Synolakis, Costas; Kanoğlu, Utku (2006-09-01)
We review standards and guidelines (S + G) for inundation models that are used to evaluate hazards from tectonic- and landslide-triggered tsunamis. Standards and guidelines have evolved in the past fifteen years through the contributions of Professor Phil Liu in numerical, analytical, and laboratory studies. These S + G have been developed over the past two years to assist in the assessment of computational models used in the production of inundation maps in the US and elsewhere. When unvalidated models are...
Yücemen, Mehmet Semih (1994-03-01)
Demarcation of areal and linear seismic sources involves a certain degree of uncertainty and this should be reflected in the final seismic hazard results. The uncertainty associated with the description of the geographical coordinates of a source zone boundary is modeled by introducing the concept of 'random boundary', where the location of the boundary is assumed to exhibit a spatial bivariate Gaussian distribution. Here the mean vector denotes the best estimate of location and the variance reflects the ma...
Citation Formats
C. Özer, “Tsunami hydrodynamics in coastal zones,” Ph.D. - Doctoral Program, Middle East Technical University, 2012.