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Design of Breakwaters for the Development of Fishery Harbour at Arjipalli (Gopalpur), Odisha
In order to achieve tranquil conditions in the harbour against the waves, the flexible rubblemound breakwaters are to be provided. Design of flexible rubblemound structures is complex as it involves various aspects such as complex wave-structure interaction, interlocking characteristics of armour, friction between armour and secondary layer etc. Several empirical formulae such as, Hudson formula and Van der Meer formula are available for preliminary or conceptual design of unit weight of armour. It is a universal practice to finalize the section of breakwater based on hydraulic model tests in wave flumes/wave basins to confirm the conceptual design evolved using empirical methods. The hydraulic model tests are essential to simulate the complex wave structure interaction as well as correct prototype site conditions of seabed slope, water level etc. (which influence the waves attacking the breakwater) can be simulated in the wave flume or wave basin. These physical models are constructed to a Geometrically Similar (GS) scale and are based on ‘Froudian’ criterion of similitude. The conceptual design of breakwater cross-sections for the development Fishery Harbour at Arjipalli (Gopalpur), Ganjam District, Odisha was evolved and confirmed its hydraulic stability through wave flume studies. The layout of two breakwaters consist of South breakwater of 756 m length extending up to −8.0 m sea bed level and East breakwater of 1242 m length extending up to −6.0 m sea bed level having an approach channel with clear width of 80 m in between the breakwaters. The maximum significant wave height (Hs) of 5.85 m for 50 year return period and Design Water Level (DWL) of +4.32 m was considered for the design of breakwaters. The design of cross sections of trunk portion consists of 2, 4 and 12 t tetrapods in the armour layer with 1:2 slope on sea side and 1–2 t stones in the armour with 1:1.5 slope on lee side. The roundhead portion of breakwater consists of 15 t tetrapods in the armour with 1:2 slope on both the sides. The hydraulic stability tests were conducted in the wave flume by reproducing the sections to a Geometrically Similar (GS) model scale of 1:40. The hydraulic stability of the breakwater cross sections has been confirmed through the wave studies for significant wave height of 5.85 m (Hs) at Design Water Level (DWL) of +4.32 m. In this paper the design of breakwater for the development of fishery harbour at Gopalpur has been described in detail.
Design of Breakwaters for the Development of Fishery Harbour at Arjipalli (Gopalpur), Odisha
In order to achieve tranquil conditions in the harbour against the waves, the flexible rubblemound breakwaters are to be provided. Design of flexible rubblemound structures is complex as it involves various aspects such as complex wave-structure interaction, interlocking characteristics of armour, friction between armour and secondary layer etc. Several empirical formulae such as, Hudson formula and Van der Meer formula are available for preliminary or conceptual design of unit weight of armour. It is a universal practice to finalize the section of breakwater based on hydraulic model tests in wave flumes/wave basins to confirm the conceptual design evolved using empirical methods. The hydraulic model tests are essential to simulate the complex wave structure interaction as well as correct prototype site conditions of seabed slope, water level etc. (which influence the waves attacking the breakwater) can be simulated in the wave flume or wave basin. These physical models are constructed to a Geometrically Similar (GS) scale and are based on ‘Froudian’ criterion of similitude. The conceptual design of breakwater cross-sections for the development Fishery Harbour at Arjipalli (Gopalpur), Ganjam District, Odisha was evolved and confirmed its hydraulic stability through wave flume studies. The layout of two breakwaters consist of South breakwater of 756 m length extending up to −8.0 m sea bed level and East breakwater of 1242 m length extending up to −6.0 m sea bed level having an approach channel with clear width of 80 m in between the breakwaters. The maximum significant wave height (Hs) of 5.85 m for 50 year return period and Design Water Level (DWL) of +4.32 m was considered for the design of breakwaters. The design of cross sections of trunk portion consists of 2, 4 and 12 t tetrapods in the armour layer with 1:2 slope on sea side and 1–2 t stones in the armour with 1:1.5 slope on lee side. The roundhead portion of breakwater consists of 15 t tetrapods in the armour with 1:2 slope on both the sides. The hydraulic stability tests were conducted in the wave flume by reproducing the sections to a Geometrically Similar (GS) model scale of 1:40. The hydraulic stability of the breakwater cross sections has been confirmed through the wave studies for significant wave height of 5.85 m (Hs) at Design Water Level (DWL) of +4.32 m. In this paper the design of breakwater for the development of fishery harbour at Gopalpur has been described in detail.
Design of Breakwaters for the Development of Fishery Harbour at Arjipalli (Gopalpur), Odisha
Lecture Notes in Civil Engineering
Pandey, Manish (editor) / Umamahesh, N. V. (editor) / Oliveto, Giuseppe (editor) / Ramana, G. V. (editor) / Patil, Uday B. (author) / Mahalingaiah, A. V. (author) / Ganesh, N. S. (author)
International Conference on Hydraulics, Water Resources and Coastal Engineering ; 2023 ; Warangal, India
2025-03-02
15 pages
Article/Chapter (Book)
Electronic Resource
English
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