Sharghivand, Naeimeh
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 using the maximum runup formula. The results are tested against field runup measurements for several events observing good agreement. Then, propagating the finite crest length initial profile defined using earthquake source parameters, the tsunami focusing --abnormal wave height in the leading depression side of an N-wave-- is related to the earthquake source parameters. A tsunami can be much more hazardous for the target coastline when the focusing point is close to the shorelines. The results presented here can help better understand the unusual observations witnessed in the fields.


Tsunami hydrodynamics in coastal zones
Özer, Ceren; Yalçıner, Ahmet Cevdet; Department of Civil Engineering (2012)
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 diff...
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...
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...
Tsunami Induced Sedimentation in Ports A Case Study in Haydarpasa Harbor Marmara Sea
Kıan, Rozıta; Velioğlu, Deniz; Yalçıner, Ahmet Cevdet; Zaytsev, Andrey (null; 2015-12-14)
The movement of sea bottom or ground sediment material by tsunami cause erosion, deposition and hence bathymetry and topogrphy changes. The unexpected depth decrease at some parts of the enclosed basins and harbors may result in lack of movements of vessels. In order to understand the sediment movement inside the enclosed basins, Haydarpasa port in the sea of Marama is selected as a case study to understand the motion of tsunamis inside the port and identify their effects on harbor functions. The highest po...
Tsunami induced scour around a monopile foundation
Fuhrman, David R; Larsen, Bjarke E; Baykal, Cüneyt; Sumer, B Mutlu (null; 2016-11-20)
While the run-up, inundation, and destructive potential of tsunami events has received considerable attention in the literature, the associated interaction with the sea bed i.e. boundary layer dynamics, induced sediment transport, and resultant sea bed morphology, has received relatively little specific attention. The present paper aims to further the understanding of tsunami-induced scour, by numerically investigating tsunami-induced flow and scour processes around a monopile structure, representative of t...
Citation Formats
N. Sharghivand, “TSUNAMI MAXIMUM RUNUP AND FOCUSING THROUGH EARTHQUAKE SOURCE PARAMETERS,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.