The Poole Bay Partnership

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Borough of Poole www.poole.gov.uk

Other sources of local coastal information

Standing Conference on Problems Associated with the Coastline Poole & Christchurch Bays Shoreline Management Plan (SMP)

These pages contain only archived material

Project videos from the team

Poole Bay Nearshore Beach Replenishment Trial 2015

Borough of Poole has been awarded £260,000 funding to trial a beach replenishment process that could make future projects more economically and environmentally sustainable.

Poole Bay overview: the area shown in the detail map (below) is marked in red

Detail map approximately 30,000 cubic metres of dredged material as close as possible to site A on a set grid pattern.

Borough of Poole www.poole.gov.uk

The funding enables a trial to investigate whether relatively small amounts of sand placed on the seabed close to shore can be moved on to the beach by natural wave forces.

It is hoped that a trickle feed of sand on a regular basis will stabilise beach width in Poole Bay and provide a more economically and environmentally sustainable solution to traditional beach renourishment solutions. This is the first trial of its kind in the UK and the findings could become important at a national level.

The trial started with the placement of approximately 30,000 cubic metres of sandy material offshore at Canford Cliffs between 9th - 14th February.

The sandy material was provided by Poole Harbour Commissioners, dredged from within the main channel of Poole Harbour and placed as close as possible to site A as indicated on the detail map (below right) on a set grid pattern.

Monitoring

The Coastal Channel Observatory (CCO) have begun their surveys to trace the movement of sand on the seabed. Over the next few months they will also be carrying out topographic surveys on the beach, bathymetric surveys in the water, and we will be taking photographs from fixed points overlooking the beach on a regular basis.

Preliminary Observations - July 2015

Main Contractors Rohde Nielsen of Denmark - www.rohde-nielsen.dk/en Poole Harbour Commissioners www.phc.co.uk Tracer Search 2

3rd March: Briony Leyland from BBC South Today visited Poole to interview our Coast Protection Manager, Stuart Terry about this project.

Play the video for an explanation of the trial and to see the Tracer sand under UV light.

Beautiful sandy beaches attract thousands to the south coast but maintaining them presents a big challenge. Now a project being trialed in Poole is using florescent sand to find out if the power of nature can tackle the problem.

Posted by BBC South Today on Tuesday, 3 March 2015

Placing material on the seabed

Tracer Searches will record the movement of sand over time.

Placement of dredged material having been completed, the Tracer particles (fluorescent sand) are loaded into large bags and lowered to the seabed in the same area in order to track movement of the material over a period of months

Tracer particles (fluorescent sand) can be seen under a simple LED UV torch; the project team can sometimes be found scouring the beach at night looking for them!

Initial results

Project videos at vimeo.com/user34272790

Loading & Releasing dredged material

View the videos here

Index

Tracer Particles

Project leaflet July 2015 explaining what we did & including preliminary observations (PDF, 2Mb)

Project Leaflet, July 2015 (PDF, 2Mb)
Downloads

Interim monitoring report July 2015 (PDF, 2Mb)

Placement

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