Figure 3 - uploaded by Bobbie B. Corbett
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Submerged breakwaters constructed of large geotextile sand containers are becoming a more common method of controlling and managing coastlines worldwide. As a relatively new approach, many facets of their behaviour, including their response to wave-induced pressures, have not been fully investigated. While several failure modes have been identified...
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Commercial fisheries and oil and gas extraction are both spatially extensive industries in the North Sea (NS), and inevitably there is physical interaction where the two activities coincide. Regular contact between fishing gear and pipelines may risk pipeline integrity and could lead to gear snagging. It is also known, anecdotally, that some vessel...
Citations
... The sand containers appear to be hydraulically smooth with a low coefficient of reflection. As part of an undergraduate thesis (Corbett 2001) a trial container with pressure transducers on, and in it (Figure 2), was filled to approximately 80% capacity with sand similar to that used in the construction of the actual reef and sewn shut. The filled container weighed 696kg, was 1.5m in length, 0.9m in width and sat 0.5m high. ...
... The filled container weighed 696kg, was 1.5m in length, 0.9m in width and sat 0.5m high. Corbett (2001) concluded that: - ...
A large reef has been constructed offshore from Narrowneck on the Gold Coast, Queensland, Australia. The reef provides a submerged, low visual impact, coastal control point to stabilize the nourished northern Gold Coast beaches. As the reef is in a popular tourist and surfing area, it has also been designed and constructed to enhance recreational amenity. For safety and cost efficiency, the reef has been constructed of very large sand filled geotextile units. Experience with the design and construction of such structures is limited and the inclusion of improved surfing as secondary design criteria increases the complexity. To facilitate evaluation and modifications to the reef there is a comprehensive monitoring program, which includes the use of ARGUS video imagery to assess the changes in the shoreline related to wave conditions at the wave rider buoy nearby. Divers are studying the physical performance of the sand filled geotextile containers, as well as the extent and diversity of the marine ecosystem which has exceeded expectations. There have been a number of storm wave events during the monitoring period. The data obtained from the monitoring is being used to modify the long term Narrowneck reef shape, and to design other proposed reefs in the area.
