Andy Ramsbottom

Harbour Engineer

Poole Harbour Commissioners

Sustainable Dredging

Making it Work

www.pooleharbouraqmp.co.uk

WaterskiWaterski Area

PW AreaPW Area

Quiet Area

WindsurfingWindsurfing

AreaArea

Bird Sensitive Areas

ShellfishLease Beds

AnchorageSensitiveZones

Replenished Beaches 1,170,000m³

Sent to Disposal Ground 769,000m³

Shoreline Management Plan

Considerations Required in Obtaining a Capital Dredging Licence

The potential impacts and mitigation measures of the following were taken into account,

as well as their implications on the designations of European sites:

� Hydrodynamic and Sedimentary Regime

� Sediment Quality

� Water Quality

� Marine and Coastal Ecology

� Marine and Coastal Ornithology

� Coastal and Terrestrial Ecology

� Fish and Shellfish Resource

� Fishing Activity

� Commercial and Recreational Navigation

� Archaeology and Heritage

� Recreation and Leisure

� Noise and Vibration

� Air Quality

� Geology, Landscape and Visual Setting

� Infrastructure, Land Drainage and Coastal Protection

� Traffic and Transportation

� Socio-economics

Licence Requirements for Long Term Monitoring

� Hydrographic Surveying

� Archaeological

� Maerl and Sabellaria

� Saltmarsh

� Beach Profiles

� Sediment Management Plan

Boscombe Surf Reef

Sediment Management Plan

Sediment Inputs through the Harbour are:

• marine from Poole Bay (sandy)

• from the cliffs and down the rivers (silty)

• erosion from saltmarsh and mudflats

Sediment Transport is by littoral drift and estuarine movement

Dredging and Disposal Areas

MFA Version

Experimental Dredge Dispersion Area

MMO Version

Turbidity Monitoring Buoy

• Current speed and direction

• Turbidity

• Salinity

• Water temperature

2010-2011 2010-2011 2011-2012 2011-2012

Predicted Actual Predicted Actual

13000 26000 28000 28000 28000 28000

Area Name

1 Poole Quays and Jetties 12948 9048 17000 17208

2 South Deep Channel 0

3 Parkstone YC 1080 1080

4 Mitchell's Boatyard 1700 1615

5 Dorset Lake Shipyard 480 480

6 Rockley Park 3000 3600

7 Salterns Marina 1900 1927

8 Moriconium Quay 2064 2064

12948 9048 27224 27974 0 0

52 16952 776 26 28000 28000Remaining:

Allowed Amount (Tonnes)

Total:

2008-2009 2009-2010

Timing of dredging is planned to minimise the

impact on Natural England’s bird feeding worry list

by selecting the least sensitive marinas

during the most sensitive periods

Recreational Survey

Students carry out annual summer watercraft count

Hydrographer carries out winter watercraft and bird survey counts

PHC and MVS daily watercraft and bird survey observations

Local islands residents’ observations

Recreational Survey

Considerations for In-Harbour Dispersion

� Hydrographic Surveying

� Turbidity Readings on the Disposal Ground

� Turbidity Readings Adjacent to Dredge Areas

Lilliput

Sailing Club

Poole Harbour Commissioners

Posh

properties!

Chichester Harbour

/ SETARMS Lead partner

14 ports of commerce

8 Local Authorities (owners) + 11 Chambers of Commerce

Sustainable Environmental Treatment and Re-use of Marine Sediments

SETARMS

�Have a better knowledge of the dredged sediments in the

Channel

�Develop and promote the sustainable practices of the

sediments management we can’t dispose at sea

�Develop and provide crossborder management tools

�Create a center of excellence and long-term

relationships between all the partners.

Main objectives

APLM, 04 April 2011

Experimental tests on 6 samplings in 2012-2013

By an industrial : Eurovia

20 m100 m

APLM, 04 April 2011

Sediment re-used

Port du Légué

Andy Ramsbottom

Harbour Engineer

Poole Harbour Commissioners

Sustainable Dredging

We’re Getting There!