Hydrodynamics of Waves Attenuation Techniques

Abstract

The primary focus of the subject thesis is the pressing necessity to safeguard coastal communities against the increasing risks that marine floods and tsunamis pose. The study looks closely at wave dissipation techniques in an effort to identify workable ways to mitigate these natural disasters. The two main forms of breakwaters are semicircular breakwaters (SCBW) and triangle breakwaters (TBW), whose dissipation tendencies and associated situations are carefully investigated & analyzed. To compare wave dissipation tendencies of these two breakwaters under various situations is the outset of the study. The outcomes constantly demonstrate how well SCBW performed in reducing the effects of waves in variation of scenarios. Subsequent research focuses on the impact of breakwater perforations on breakwater affectability, determining ideal porosities, and verifying the superior wave dissipation capacities of semicircular breakwater over Triangular breakwater. These studies emphasize the critical role that breakwater’s location, porosity, and design play in enhancing resilience to marine disasters and provide valuable insights into effective coastal protection measures. This study examines the impact of the breakwater's location in relation to the shoreline on its dissipation tendencies. Most effective placement strategies are identified following widespread testing. Furthermore, the Shoreline Elevation Index (SEI), a novel non-dimensional statistic, is introduced. An empirical investigation is conducted into the relationship between Shoreline Elevation Index and percentage dissipation by placing breakwaters at nine distinct different positions from shore. Statistical analysis is utilized to confirm the experimental results by building a linear regression model and examining the relationship between shoreline elevation index, Z/Ls and wave dissipation tendencies using IBM SPSS Statistics 26.