Topic
Groyne
About: Groyne is a research topic. Over the lifetime, 397 publications have been published within this topic receiving 4549 citations. The topic is also known as: groin & Breakwater.
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01 Jan 2008
2 citations
TL;DR: A numerical model based on large eddy simulation code supported with a laboratory experiment was used to explore the mechanism of scour and deposition process around a submerged L-head groyne at eq...
Abstract: A numerical model based on large eddy simulation code supported with a laboratory experiment was used to explore the mechanism of scour and deposition process around a submerged L-head groyne at eq...
2 citations
Patent•
04 May 2016
TL;DR: In this paper, a deepwater slope type groyne rubble installation and slope arrangement process is described for segmented flow operation of an outer slope of a slope levee, converted a water construction position to land construction under the precondition of not increasing the project cost, and improves the operation efficiency.
Abstract: The invention discloses a deepwater slope type groyne rubble installation and slope arrangement process. The segmented construction is performed for a groyne consisting of a levee crown area, a coastal side levee slope and a high seal side levee slope in the length direction from a bank side; the construction comprises rough polishing and slope arrangement of breakwater core stones, installation and slope arrangement of armor rocks and installation of armor blocks; for the construction section after the rough polishing of the breakwater core stones, firstly, the slope arrangement of the breakwater core stones and the installation and slope arrangement of at least one layer of armor rocks are performed for the levee crown area; then, a first armor rock construction platform horizontally connected with the levee crown area is built on the coastal side levee slope; and the slope arrangement of the breakwater core stones and the installation and slope arrangement of at least one layer of armor rocks are performed for the coastal side levee slope. The process is applied to segmented flow operation of an outer slope of a slope levee, converts a water construction position to land construction under the precondition of not increasing the project cost, and improves the operation efficiency.
2 citations
DOI•
14 Jul 2020
TL;DR: In this paper, the authors suggest that erosion is likely to appear at the downdrift beach stretch of a groin system, due to lack of sufficient sand feeding from the updrift groined beach reaching the downwind drifts.
Abstract: Beach erosion, the loss of sand from a beach due to longshore and/or cross-shore sediment transport mechanisms, is a challenging problem. In order to stabilize the beach and to slow down the rate of beach erosion, the construction of hard hydraulic structures is a traditional option. Groins are one of the oldest man-made hydraulic structures designed to intercept the longshore sediment transport and to stimulate sediment deposition within the groin compartments. However, erosion is likely to appear at the downdrift beach stretch of a groin system, due to lack of sufficient sand feeding from the updrift groined beach reaching the downdrift beach. To alleviate sand starvation at a downdrift beach of groins, groins are suggested to be gradually shorter and more permeable approaching the downdrift terminal groin. The primary advantage of permeable groins, compared to impermeable groins, is they do not entirely block longshore currents. The large openings of permeable groins allow littoral drift to flow through. The shoreline response to permeable groins is comparable to a straight line, other than a zig-zag shape response to impermeable groins. Nevertheless, even though the benefits of permeable groins seem obvious, the research on the subject of the hydrodynamics of permeable groins in coastal waters is limited.
2 citations