Calibration and evaluation of the 3rd generation wave models under extreme conditions in black sea basin

Kirezci, Çağıl
In this study, performances of 3rd generation wave models, SWAN and WAVEWATCH III, under storm conditions in Black Sea are compared considering two different wind source (CFSR and ECMWF operational) data. Basic wave parameters (outputs of the spectral wave models) demonstrate that the governing physical processes in deep water consist of three terms; wind-wave interaction, dissipation of energy due to whitecapping and swell, and nonlinear wave-wave interactions. Effects of different methodologies for the solutions of these physical processes over the frequency and directional space are discussed. Best representation of extreme events in Black Sea was obtained by using WAVEWATCH III model coupled with CFSR wind data. All parametric and solution methodology variations modelled with different wind source data generated results in good agreement with the observations from buoy data in Sinop, Hopa and Gelendzhik. Although, wind wave interaction and dissipation terms defined in Ardhuin et al., 2010 also performed significantly better than the other available methods with its higher correlation to buoy data. Finally, most appropriate boundary conditions and parametrizations for Black Sea basin is introduced for both SWAN and WAVEWATCH III, as a result of calibration and sensitivity analysis study using the observations.


Özyurt Tarakcıoğlu, Gülizar (null; 2019-05-15)
In the previous studies Poseidon Buoy data are used for both calibration and validation forthird generation wave models in Aegean Sea. However, due to spatial resolution limits(caused by huge computational time of wave model), there is problem with the bathymetry.This problem is caused by complex orography of Aegean Sea and existence of islands.Depth of Poseidon buoys are under 20m and it is not possible to obtain these depths forany of Poseidon buoys with a spatial resolution that is applicable for calibra...
Long waves generation by atmospheric pressure disturbances and case study
Çabuk, Özge; Yalçıner, Ahmet Cevdet; Department of Civil Engineering (2019)
One of the interesting marine events is the long wave generation due to spatial and temporal changes of atmospheric pressure and wind fields during storm events. These kind of phenomena is called as storm surge and cause basin wide and local water level changes in sea surface and sometimes amplifies at some regions. There are examples of these kinds of event in all over the world. In this study the atmospheric pressure and wind fields are used as the input to the numerical model NAMI DANCE which solves Nonl...
Calibration and evaluation of wavewatch III under extreme conditions in Eastern Mediterranean and Aegean Sea Basin
Bingöl, Cem; Özyurt Tarakcıoğlu, Gülizar; Department of Civil Engineering (2019)
In this study, performance of WAVEWATCH III under extreme waves in Eastern Mediterranean Sea and Aegean Sea is assessed using Climate Forecast System Reanalysis wind data. Best source term is selected from all five source terms that is available in WAVEWATCH III for representation of wind waves in the region. Calibration of the selected source term is conducted for Aegean Sea and Turkish Coast of Mediterranean Sea. Three new Turkish State Meteorological Service buoys are utilized in the study which were nev...
Surge and coastal inundation study of September 2014 storm in Giresun, Black Sea
Aydın, Deniz Can; Yalçıner, Ahmet Cevdet; Özyurt Tarakcıoğlu, Gülizar; Department of Civil Engineering (2016)
In Turkey, due to the fact that the Black Sea coast is vulnerable to storms and coastal hazards, further comprehensive studies for storm surge and consequent coastal inundation are necessary. The aim of this study is to investigate wave formation under storm conditions and analyze coastal flooding in Giresun during the storm event occurred between 23-26 September 2014. For this purpose numerical studies are carried out in two phases. In phase 1, coupled ADCIRC+SWAN model is used for examining wave generatio...
Calibration and Evaluation of WRF-Hydro Modeling System for Extreme Runoff Simulations: Use of High-Resolution Sea Surface Temperature (SST) Data
Kılıçarslan, Berina Mina; Yücel, İsmail; Department of Civil Engineering (2022-2)
This study investigates the impact of the spatio-temporal accuracy of four different sea surface temperature (SST) datasets on the accuracy of the Weather Research and Forecasting (WRF)-Hydro system to simulate hydrological response during two catastrophic flood events over the Eastern Black Sea (EBS) and the Mediterranean (MED) regions of Turkey. Three daily-updated and high spatial resolution external SST products (GHRSST, Medspiration, and NCEP-SST) and one coarse-resolution and time-invariant SST produc...
Citation Formats
Ç. Kirezci, “Calibration and evaluation of the 3rd generation wave models under extreme conditions in black sea basin,” M.S. - Master of Science, Middle East Technical University, 2016.