Contact Us Register Now

Convened by:

18-20 June 2019

Telford International Centre, UK

Gemma Carey

Gemma Carey

Gemma Carey

Environmental Scientist, Black & Veatch Speaking On: Day 1 (20th March) Session: Coastal flood risk modelling
Download Presentation
  • Saltmarsh recharge by beneficial use of dredged material as an effective approach to coastal protection

Lymington Harbour Commissioners undertook a saltmarsh recharge trial between 2014 and 2016 as an alternative method of disposing maintenance dredged material from Lymington Harbour, while also protecting the rapidly eroding saltmarsh habitat. Over 19,000 tonnes of material was deposited to a tidal creek in three annual phases.

Bathymetric surveying illustrated that a substantial amount of material was retained in the immediate dumping area, with an average rise of 0.36m in bed level, six months after the last dumping event. As expected, most of the sediment dispersed into the surrounding environment, leaving a small proportion in the saltmarsh, contributing to its regeneration and protecting the edge of saltmarsh from wave action.

 Overall, the trial was considered to be a successful, innovative approach to coastal protection, with the saltmarsh benefitting physically and ecologically; the Commissioners plan to continue the scheme, to promote and enhance saltmarsh stability.

The presentation will consider the following challenges that were overcome: 

  • Slow down/reverse the rate of saltmarsh retreat; 
  • Enhance the existing saltmarsh habitat; 
  • Reduce wave energy and encourage deposition of sediment, without disturbing the existing designated areas. 

It will conclude by weighing up advantages and disadvantages of the trial, and the effectiveness of replicating this approach elsewhere.

Back to all speakers

Flood and Coast 2018RT @WomenInFCERM: Massively excited to launch our first ever #WomeninFCERM awards on this #InternationalWomenDay!

We want to hear about th…

Flood and Coast 2018RT @markgarrattea: So, with a only few days left to get your nominations in for this years @EnvAgency Project Excellence Awards that will b…

Flood and Coast 2018RT @SWMtweet: It's only 4 months to go until this year's @floodandcoast event

We're pleased to be exhibiting across the three days, 18-20…

Flood and Coast 2018RT @markgarrattea: Great to meet with the flood digital knowledge team this week in #Warrington and talk #DigitalTransformation Brilliant w…

Flood and Coast 2018RT @markgarrattea: Brilliant meeting with a brilliant advisory group, shaping what should be a fantastic programme for #floodandcoast19. D…

Flood and Coast 2018Conference programme for #FloodandCoast19 really taking shape at yesterday’s Advisory Committee meeting #FCERM… https://t.co/Mu1B2GFLwZ