Unravelling the influence of water depth and wave energy on the facies diversity of shelf carbonates

Sedimentology ◽  
2014 ◽  
Vol 62 (2) ◽  
pp. 541-565 ◽  
Author(s):  
Sam J. Purkis ◽  
Gwilym P. Rowlands ◽  
Jeremy M. Kerr
Keyword(s):  
Water Depth ◽  
Wave Energy ◽  
Influence Of Water

scholarly journals Crown Wall Modifications as Response to Wave Overtopping under a Future Sea Level Scenario: An Experimental Parametric Study for an Innovative Composite Seawall

2020 ◽  
Vol 10 (7) ◽  
pp. 2227 ◽  
Author(s):  
Pasquale Contestabile ◽  
Gaetano Crispino ◽  
Sara Russo ◽  
Corrado Gisonni ◽  
Furio Cascetta ◽  
...  
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Water Depth ◽  
Wave Energy ◽  
Laboratory Tests ◽  
Management Strategies ◽  
Rear Side ◽  
Wave Energy Conversion ◽  
Wave Overtopping ◽  
Influence Of Water

The overtopping phenomenon at the rear side of breakwaters has particular importance in harbor protection. Undoubtedly, this topic needs to be taken even more seriously, considering the sea level rise. The present study focuses on the effectiveness in the reduction of the wave overtopping of a triangular parapet placed on the top of an innovative concrete superstructure. The last is part of the OBREC device (Overtopping BReakwater for wave Energy Conversion), an overtopping structure which is integrated into a traditional rubble-mound breakwater, to convert wave energy into electricity. Parametric laboratory tests, including the influence of water depth, have led to the evaluation of the accuracy of the main literature formulations and to the introduction of a new overtopping formula to take into account the influence of the parapet geometry. The results highlight the capability of the parapet in significantly increasing the hydraulic protection compared to a breakwater with a traditional crown wall. The findings from this work are expected to support in promoting and developing adaptive management strategies for existing coastal defenses and smart approaches in the construction and maintenance of new ones, with special reference to future sea-level-rise scenarios.

scholarly journals Wave power extraction from a bottom-mounted oscillating water column converter with a V-shaped channel

2014 ◽  
Vol 470 (2167) ◽  
pp. 20140074 ◽  
Author(s):  
Zhengzhi Deng ◽  
Zhenhua Huang ◽  
Adrian W. K. Law
Keyword(s):  
Water Column ◽  
Water Depth ◽  
Wave Energy ◽  
High Efficiency ◽  
Expansion Method ◽  
Opening Angle ◽  
Energy Extraction ◽  
Oscillating Water Column ◽  
Wave Direction ◽  
Power Extraction

An analytical theory is developed for an oscillating water column (OWC) with a V-shaped channel to improve the pneumatic efficiency of wave energy extraction. An eigenfunction expansion method is used in a cylindrical coordinate system to investigate wave interaction with the OWC converter system. Auxiliary functions are introduced to capture the singular behaviours in the velocity field near the salient corners and cusped edges. Effects of the OWC dimensions, the opening angle and length of the V-shaped channel, as well as the incident wave direction, on the pneumatic efficiency of wave energy extraction are examined. Compared with a system without the V-shaped channel, our results show that the V-shaped channel can significantly increase the conversion efficiency and widen the range of wave frequency over which the OWC system can operate at a high efficiency. For typical coastal water depths, the OWC converter system can perform efficiently when the diameter of the OWC chamber is in the range of 1 5 – 1 2 times the water depth, the opening angle of the V-shaped channel is in the range of [ π /2, 3 π /4] and the length of the V-shaped channel is in the range of 1–1.5 times the water depth.

Evolution of a nourished sand beach under low wave energy in Thailand

Shore & Beach ◽  
2021 ◽  
pp. 36-54
Author(s):  
Jirat Laksanalamai ◽  
Nobuhisa Kobayashi
Keyword(s):  
Water Depth ◽  
Wave Energy ◽  
Surf Zone ◽  
Tidal Range ◽  
Gulf Of Thailand ◽  
Medium Sand ◽  
Sand Beach ◽  
Profile Changes ◽  
One Year ◽  
Upper Gulf Of Thailand

Sand beaches are essential for coastal tourism in Thailand, but erosion narrowed some beaches significantly over the years. Pattaya is a famous resort near Bangkok in the upper Gulf of Thailand. The Pattaya beach is microtidal with the average tidal range of 1.5 m. The average significant wave height is 0.2 m and the wave energy is low. The beach was widened by placing 130 m3/m of medium sand along the shoreline length of 2.8 km between two terminal groins constructed in 2018. The bathymetry and topography were measured in 2015, 2019, and 2020. Approximately 14% of the placed sand in the water depth less than 2 m was lost after one year, as may be expected for nourished beaches. The bathymetry change in the water depth of 2-4 m varied alongshore. The sand volume change in this offshore zone beyond the surf zone was as large as that in the landward sand placement zone. The assumption of negligible profile changes seaward of a closure depth is not applicable to this beach during 2015-2020.

scholarly journals Diffuse reflectance of oceanic shallow waters: Influence of water depth and bottom albedo

1994 ◽  
Vol 39 (7) ◽  
pp. 1689-1703 ◽  
Author(s):  
Stéphane Maritorena ◽  
André Morel ◽  
Bernard Gentili
Keyword(s):  
Water Depth ◽  
Diffuse Reflectance ◽  
Shallow Waters ◽  
Influence Of Water ◽  
Bottom Albedo

New equations of wave energy assessment accounting for the water depth

2017 ◽  
Vol 188 ◽  
pp. 130-139 ◽  
Author(s):  
Bingchen Liang ◽  
Zhuxiao Shao ◽  
Guoxiang Wu ◽  
Meng Shao ◽  
Jinwei Sun
Keyword(s):  
Water Depth ◽  
Wave Energy ◽  
Energy Assessment
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