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SCOPAC Committee

Coastal Monitoring

The Southern Coastal Group (SCG)

www.southerncoastalgroup.org.uk

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Cllr Mrs M Penfold MBE, West Dorset District Council

Vice-Chair

Cllr Jackie Branson, Havant Borough Council

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Technical assistance provided to Councillors by

Mr Lyall Cairns (Eastern Solent Coastal Partnership)

and

Dr Samantha Cope (SCOPAC Research Chair)

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www.channelcoast.org

Current Research

SurgeWatch: a user-friendly database of coastal flooding for the UK

SCOPAC Contaminated Land Study

Scanning of historical aerial photography

Beach response in front of structures in open coast

Reducing regional flood and erosion risk from wave action on the Channel Coast

Maintenance of coastal structures - Phase 1: Timber groynes

Completed Research

Poole Bay Nearshore Replenishment Trial (2014-2017)

Bradbury’s Bursary: Lauren Burt (2016) and Emma Harris (2017)

SCOPAC Sediment Transport Study update 2012

Offshore to onshore transport across distinct landforms at Church Norton Spit: Minor Funds Contribution 2015-2016

Coastal sediment budget project: Minor Funds Contribution 2013-2016

Seabed Mapping Selsey to Eastoke: Minor Funds Contribution 2013-2015

Sediment Tracer Study Phase II: Minor Funds Contribution 2011-2013

Non-standard Rock Groynes: Minor Funds Contribution 2011-2013

Sediment Tracer Study Phase I: Minor Funds Contribution 2010-2011

ACCESS Project 2011

Extreme Wave Conditions within the SCOPAC region 2008-2010

Strategic Regional Coastal Monitoring

RESPONSE European Project 2006-2009

RESPONSE European Project Maps

SCOPAC Sediment Transport Bibliographic Database (v6, 2012)

SCOPAC Sediment Transport Study 2004

Evolution of the Solent River animation

Evolution of Lyme Bay animation

Preparing for the Impacts of Climate Change 2001

SCOPAC contributed £15,000 towards the monitoring of a trial testing a new approach to beach replenishment in Poole Bay. The concept was to make use of locally dredged sediment and place it near the shore, allowing the prevailing waves and tidal currents to move material toward and along the beach.

The Sand Motor (or Sand Engine) concept has been widely used in the Netherlands since the 1990's given that it is cheaper and less intrusive compared with traditional beach renourishment approaches (The Sand Engine: a solution for vulnerable deltas in the 21st Century? Coastal Dynamics 2013). The works at Poole Bay are of national importance given that the Sand Motor concept had never before been trialled on beaches in the United Kingdom.


Poole Borough Council £15,000 contribution (2014-2017)

Poole Bay Nearshore Replenishment Trial

Method

The Marine Management Organisation (MMO) granted the licence to allow the placing of sand in the sea. The works were undertaken between the 9th and 14th February 2015, when 30,000m³ of sand was placed on the sea bed approximately 400m offshore at Canford Cliffs Chine (Poole), in water between 5-8m deep.

Poole Harbour Commissioners provided the sand from maintenance dredging of Poole Harbour entrance, thereby recycling beach material back into the system, rather than dumping it offshore at a disposal site.

Seven survey sets were collected by the Channel Coast Observatory (CCO) over time. Each set consisted of a topographic survey of the beach and a bathymetric survey of the sea bed. In addition, fluorescent tracer studies were undertaken to establish a link between the sediment deposited on the sea bed and the beach.

An Acoustic Doppler Current Profiler (ADCP) measured the speed, direction and turbidity of water currents using sound waves. With the ADCP installed, any turbidity difference between the trial and conventional beach recharge could be assessed.

A ‘lessons learned’ leaflet was produced by the steering group for practitioners and regulators.

For further reference please see:

www.gov.uk/government/publications/trialli ng-a-new-approach-to-beach-replenishment-in-poole-bay

www.poolebay.net/replenishment-trials.html

Click to download (PDF)

EA Project Summary document

March 2018

Project leaflet July 2015 describing the project and including preliminary observations (PDF, 2Mb)

Click to view full size image

The beach at Canford Cliffs Chine, Poole: before the project and in July 2015

Click to download (PDF, 10Mb)

EA Project Report

March 2018 (PDF, 10Mb)

Project Leaflet, July 2015 (PDF, 2Mb) EA Project Summary document, March 2018 (PDF)