Application of a numerical model for wave parameter hindcasting in the Marmara Sea Basin

Yıl 2020, Cilt: 22 Sayı: 2, 567 - 580, 10.04.2020

Yasin Abdollahzadehmoradı

https://doi.org/10.25092/baunfbed.742276

Öz

One of the most important factors in design of coastal and marine structures is to determine the wave characteristics precisely. In this paper, wave characteristics of Sea of Marmara obtained during the time span between 1994 and 2014 by using the third generation spectral model MIKE 21 SW. Wind data was obtained from ECMWF ERA-Interim re-analyses wind dataset with a spatial resolution of 0.125 degree. The numerical model was calibrated with a wave data that measured for 1 year (2013) by measurement buoy on the Southern coast near the Istanbul in the Sea of Marmara. Numerical mesh optimization was also performed to obtain the most suitable domain to overcome the time efficiency problem in running time of the model. This research is recently amongst the first studies that deal with the determination of wave parameters in the Marmara Sea Basin. In addition, the relation between significant wave height and wave period is established. The results reveal that wave prediction capacity of the numerical model gives satisfactory results.

Anahtar Kelimeler

Sea of Marmara, MIKE 21 SW, wave parameter hindcasting, ECMWF ERA-Interim re-analyses, numerical mesh optimization

Teşekkür

The author wishes to thank to the Turkish Petroleum for providing the buoy wave data, to the ECMWF for providing the wind data, and to the MGDS for providing the bathymetry data.

Marmara Denizinde dalga parametresi tahmini için sayısal modelin uygulanması

Öz

Kıyı ve deniz yapılarının tasarımında en önemli faktörlerden biri dalga özelliklerinin minimum hata ile belirlenmesidir. Bu çalışmada, 1994-2014 yılları arasında Marmara Denizi'nin dalga özellikleri, üçüncü nesil spektral bir model olan MIKE 21 SW kullanılarak elde edilmiştir. Bu modelde kullanılan Rüzgâr verileri, 0.125 derecelik bir uzamsal çözünürlüğe sahip olan ECMWF ERA-Interim rüzgâr veri setidir. Sayısal model, Marmara Denizi'nde İstanbul yakınlarında bulunan Güney kıyısındaki ölçüm şamandırası ile 1 yıl (2013) için ölçülen dalga verileri ile kalibre edilmiştir. Modelin çalışma süresindeki zaman verimliliği sorununun üstesinden gelmek için sayısal ağ optimizasyonu gerçekleştirilmiştir. Bu araştırma son zamanlarda Marmara Denizi Havzası'nda dalga parametrelerinin belirlenmesi ile ilgili ilk çalışmalar arasındadır. Ayrıca, belirgin dalga yüksekliği ve dalga periyodu arasındaki ilişkiler elde edilmiştir. Sonuçlar, sayısal modelin dalga tahmin kapasitesinin tatmin edici sonuçlar verdiğini ortaya koymaktadır.

Anahtar Kelimeler

Marmara Denizi, MIKE 21 SW, dalga parametresi tahmini, ECMWF ERA-Interim re-analyses, sayısal ağ optimizasyonu

Kaynakça

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