HYDRAULICS. ENGINEERING HYDROLOGY. HYDRAULIC ENGINEERING

Scour study in front of the breakwater caused by the oblique waves ifluence

Vestnik MGSU 2/2014
  • Sharova Vera Vladimirovna - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate student, Department of Hydraulic Engineering, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe Shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 179-186

This paper presents a study of the scour in front of the breakwater caused by oblique waves influence. The experiments were conducted to investigate this scour. The experimental results indicate that the maximum depth of scour hole is observed near the breakwater. The scour depth increases as a wave period and incident wave angleincrease. While comparing the present experimental results with the previous study, it is found out that the scour caused by oblique waves influence considerably differs from the scour caused by the influence of straight waves. Breakwater is an important component of a sea port. It is intended to protect the port water area from the impacts of waves, currents and sediments. The scour in front of the breakwater may occur as a result of waves and currents. It may cause the damage of a construction and stop the proper functioning of the port. Therefore the study of scour is an important task of hydraulic construction.When oblique waves approach the breakwater the system of three-dimensional waves are formed, which are called “short-crested waves”. These waves generate a current along the breakwater front. The current interacts with the ground and causes erosion of the bed. This mechanism differs from the mechanism of erosion in the case of frontal approach of waves when the standing waves are formed. Namely, erosion of the bed is the result of the wave velocity increase due to the reflection of waves at the structure. However, in engineering practice of hydraulic structures design, the influence of oblique waves is neglected and is taken into account only in case of the regular incoming of the waves.

DOI: 10.22227/1997-0935.2014.2.179-186

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