scispace - formally typeset
Search or ask a question
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.


Papers
More filters
Patent
03 Feb 2009
TL;DR: A groyne made from 80 used car tyres in four rows and compressed to form a bale is described in this paper, where anchors are attached to the bales to hold them in position.
Abstract: The invention relates to a groyne made from tyre bales The tyre bales 3 are formed from 80 used car tyres in four rows and compressed to form a bale The compressed bale may be held together with stainless steel wire which passes through the centre of the tyres Anchor ropes 4 may pass through the bales to hold them in position At the end of the groyne a tee shaped hot dipped galvanized anchor 2 may be driven into the sea bed and to which are fixed rings, to which the anchor ropes are secured As the tyre bales are placed they may be filled with sand or sediment to add extra ballast At intervals bulk liquid containers (IBC's) 1 contained in a galvanized cage may be filled with ballast and used as anchors The anchor ropes may also pass through the bulk liquid containers to hold the tyre bales in place Galvanized steel mesh 5 may be fitted on top of the groyne to facilitate fishing or allow boats to be moored

1 citations

01 Jan 2014
TL;DR: In this article, the authors investigated feedback mechanisms in the complex flow-sediment-ecology tripartite relationship arising from the interactions between hydrodynamics, sediment transport and segregation, and microbial colonization and bed stabilization.
Abstract: The experimental project presented herein investigated feedback mechanisms in the complex flow-sediment-ecology tripartite relationship arising from the interactions between hydrodynamics, sediment transport and segregation, and microbial colonization and bed stabilization. The experiment was conducted in a groyne field constructed in the Total Environment Simulator located at “The Deep” facility at the University of Hull. Detailed measurements of flow hydrodynamics in the main channel and groyne embayments were obtained using acoustic doppler velocimeter (ADV) probes, while the redistribution and segregation of bed sediments were measured using an array of ultrasonic range sensors (URS), coupled with detailed laser bed scans and high-resolution photographic images. In terms of investigating biogrowth colonization and stabilization of these segregated sediments, a MagPI (Magnetic Particle Induction) device was used to measure biofilm adhesiveness at various bed locations and at various stages during the growth phase. Preliminary results from this study are presented herein.

1 citations

Journal ArticleDOI
01 Jan 2017
TL;DR: In the present work, performances of four simple finite difference schemes are compared in simulation of flow around groyne structure and the best model is found out in terms of accuracy and efficiency.
Abstract: The flow processes around a groyne structure is a complex and challenging topic in computational hydraulics and has brought attention of many researchers in the last few decades. In comparison to experimental studies, numerical modeling can provide more details about the flow characteristics at less cost. In the present work, performances of four simple finite difference schemes, i.e., Lax diffusive scheme, predictor corrector scheme, modified predictor corrector scheme and Beam and Warming scheme are compared in simulation of flow around groyne structure. The numerical results are validated with available experimental data and the best model is found out in terms of accuracy and efficiency.
01 Jan 2014
TL;DR: In this paper, the authors analyzed the changes in the river bed elevation (morphology) and the depth of scour in the upstream groyne caused by the installed at the river meanders.
Abstract: One of the structures to protect river bank erosion is groyne. Groyne can serve and control water flow, reducing flow velocity and scour of river bank. The purposes of this study is to analyze the changes in the river bed elevation (morphology) and the depth of scour in the upstream groyne caused by the permeable groyne installed at the river meanders. The experiment was conducted at Fluid Mechanics and Hydraulics Laboratory, Sriwijaya University. The study tested the hydraulics models, a trapezoidal channel, meanders angle of 90u, five permeable groynes at meanders, and the water flowing in the channels was clear water. The observations were carried out with a flow rate was 63,32 Lt / min, three variations of permeable groynes angle were 45u, 90u and 135u to the upstream within 1 hour, 2,5 hours and 4 hours for each angle variations . The results of this study showed that the flow velocity of meanders was decreasing to the end of the meanders, and the changes of channel only occurred at the riverbed. Maximum riverbed changes (Bt / Bo) for permeable groyne angle of 45u, 90u and 135 u were 1,376 cm, 1,346 cm dan 1,452 cm. The maximum depth of scour (ds/y) for permeable groyne angle of 45u, 90u and 135u were 1,05 cm, 0,95 cm dan 1,17 cm. Thus, permeable groyne with angle of 90 proved to be the best with the smallest riverbed changes (Bt /Bo) was 1,346 cm and the coefficient of determination (R 2 ) was 0,9384, and also the smallest scour depth (ds/y) was 0,95 cm and the coefficient of determination (R 2 ) was 0,8317 compared to other
Journal ArticleDOI
TL;DR: In this article, PIV and LIF techniques were conducted to reveal relationship between sedimentation and mass exchange property in a groyne field and the results normalized by turbulence intensity and length scale of gyre were in good agreement with a large-eddy model.
Abstract: PIV and LIF techniques were conducted to reveal relationship between sedimentation and mass exchange property in a groyne field. It was found from the PIV measurements that different bed-form conditions, that is to say, with and without bed slope, yielded corresponding gyre formations. The other experiment, the LIF results allowed us reasonably to evaluate transfer velocity of dye through boundary between mainstream and dead water zone, They suggest that mass exchange properties have significant relations with horizontal gyres, thereby, with the conditions of bed slope. The results normalized by turbulence intensity and length scale of gyre were in good agreement with a large-eddy model.

Network Information
Related Topics (5)
Surface runoff
45.1K papers, 1.1M citations
73% related
Water flow
82.5K papers, 912.5K citations
73% related
Water resources
47.4K papers, 772.9K citations
71% related
Water quality
67.1K papers, 945.1K citations
70% related
Sediment
48.7K papers, 1.2M citations
69% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202114
202020
201924
201823
201714
201617