نتایج جستجو برای: breakwater protective layer
تعداد نتایج: 395584 فیلتر نتایج به سال:
In the past decades, many references have studied the mechanics of meandering damage for breakwater. However, up to the present time, no model has been proposed to compute the consequence of this kind of damage quantitatively. So, this paper tries to solve this problem by combining the expected sliding distance technique and the diffraction model. 1 Preface The meandering damage of breakwater i...
The paper presents the results of a series of experiments conducted on physical models of Quarter-circle breakwater (QBW) in a two dimensional monochromatic wave flume. The purpose of the experiments was to evaluate the reflection coefficient Kr of QBW models of different radii (R) for different submergence ratios (d/hc), where d is the depth of water and hc is the height of the breakwater cres...
A submerged horizontal plate type breakwater is pointed out as an efficient wave protection device for cage culture in marine fishery. In order to reveal the wave elimination principle of this type breakwater, boundary element method is utilized to investigate this problem. The flow field and the trajectory of water particles are studied carefully. The flow field analysis shows that: the intera...
Shorelines at the interface of marine, estuarine and terrestrial biomes are among the most degraded and threatened habitats in the coastal zone because of their sensitivity to sea level rise, storms and increased human utilization. Previous efforts to protect shorelines have largely involved constructing bulkheads and seawalls which can detrimentally affect nearshore habitats. Recently, efforts...
The floating breakwater is a protective structure that can absorb waves and be used effectively in coastal areas with moderate wave environmental conditions. stability of the affected by tension mooring line weight anchor. This research was conducted experimentally model scale 1:10 on systems concrete anchor blocks three types configurations. experiment carried out irregular following variation...
In the present article a new procedure is proposed to study the interactions between maritime breakwaters (submerged or emerged) and the waves, by integrating CAD and CFD software. The approach is meant to match closely the physical laboratory test procedure, and it is oriented at analyzing the hydrodynamic aspects of the phenomenon (overtopping, breaking, run-up, reflection, transmission) and ...
A new and symmetrical single layer armour unit, the crablock, has been designed in the UAE. One breakwater was reconstructed with crablock, but very limited testing had been performed. Just to become more acquainted with this new unit, precompetitive research at a university has been performed, which is the subject of this paper. Being a new armour unit, the placement was investigated first. Th...
KOMAR, P.D., 2010. Shoreline evolution and management of Hawke’s Bay, New Zealand: tectonics, coastal processes, and human impacts. Journal of Coastal Research, 26(1), 143–156. West Palm Beach (Florida), ISSN 0749-0208. The evolution of the coast of Hawke’s Bay, New Zealand, and its erosion problems have been governed by multiple factors, including its tectonic setting with an earthquake in 193...
Breakwaters have changed a lot during their design history. Overtopping is an important parameter that its evaluation and reduction has always been noticed. In this study, the wave overtopping of composite berm breakwater as a new conceptual structure has been investigated numerical modeling was performed using FLOW-3D software. Then, based on a laboratory model conducted by Losada et al, cali...
BACKGROUND: The bioengineering technique used in Germany for erosion control includes a relatively low-cost biodegradable breakwater with wetlands located shoreward. The technique has application for shoreline erosion control on many U.S. reservoirs with dense thickets of young, woody trees, e.g. willow, cottonwood, and alder, located near them since these materials are used in the breakwater. ...
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