Investigation of offshore bar geometry under regular and irregular waves


Gunaydin K., Kabdaşlı M. S.

JOURNAL OF COASTAL RESEARCH, cilt.21, sa.2, ss.374-382, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 21 Sayı: 2
  • Basım Tarihi: 2005
  • Doi Numarası: 10.2112/01-103.1
  • Dergi Adı: JOURNAL OF COASTAL RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.374-382
  • Anahtar Kelimeler: coastal engineering, dynamic stability, wave channel, beach, MIGRATION, BEHAVIOR
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

In this paper, the geometric characteristics of wave-induced offshore bars are investigated by using physical models. Both regular and irregular waves were used during the testing. Beach sand with a mean diameter of 0.35 mm and a specific gravity of 2.63 was selected for the study. The initial slope of the beach was 1:5. Different wave groups were generated over the initially flat beach, and a number of geometric parameters were determined. These parameters included the location of the bar crest, the equilibrium point, and the closure point. The results of the experimental study were evaluated and some empirical expressions based upon the results are suggested to define those geometric parameters for pure regular waves, pure irregular waves and regular-irregular waves. The proposed formulas were compared with those of Silvester and Hsu (1997). These comparisons showed that a good correlation exists between the results of their earlier formulas and those of the proposed formulas derived for regular waves. It was also determined that the effect of wave types upon the bar crest is more than that of the equilibrium point.