U.K.'s Liverpool Bay Dredging Secret Discovered

Natural Environment Research Council
Thursday, April 18, 2013

New research tracking the movement of dredged sediment around Liverpool Bay could save millions of pounds in dredging costs.

Each year, sediment must be dredged from the port and deposited elsewhere to maintain access for commercial vessels. But according to the new study by scientists at the National Oceanography Center in Liverpool, the dredged material appears back in the port again within just a few weeks of its removal, carried by sea currents.

The team used computer models to predict the movement of a particle of dredged material once it had been deposited in the bay.

“It's just like the computer models they use to predict the weather,” said Dr. Alex Souza of the Natural Environment Research Council’s (NERC) National Oceanography Centre. “For the weather they track a balloon; here we are tracking a particle of sediment.”

Previous models hadn't taken into account the differences in density between fresh water from the river and salty seawater. Those differences drive currents which, in turn, affect the movement of the dredged sediment. The costs of dredging are not just economic. Concern has also been expressed about the disturbance of contaminated materials and the damage they could cause to the environment.

Dr. Souza and his team are working with the Centre for Environment, Fisheries & Aquaculture Science (CEFAS) to look for areas within the Mersey Estuary where the material could be safely disposed. “The money saved could be in the millions of pounds,” he said. “Obviously, repeatedly dredging the same material is costing a lot of money, but the savings in environmental costs could be even greater.”

Maritime Today

The Maritime Industry's original and most viewed E-News Service

Maritime Reporter November 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds


Henriksen Unveils Strongest SOLAS Boat Lifting Hook

H Henriksen of Norway has received SOLAS certification for a new off-load single-point boat lifting hook capable of holding up to 22.5-tonnes. The quick release

Evoqua, Drew Marine Ink BWMS Deal

Evoqua Water Technologies and maritime solutions and logistics expert, Drew Marine, have announced a partnership to provide a full compliance package for ballast water management.

Raytheon Anschütz Succeeds in SYNTACS SAT

Raytheon Anschütz, a leading integrator of naval integrated bridge systems, has successfully completed the Sea Acceptance Test (SAT) for the Synapsis Tactical Command

Marine Science

Henriksen Unveils Strongest SOLAS Boat Lifting Hook

H Henriksen of Norway has received SOLAS certification for a new off-load single-point boat lifting hook capable of holding up to 22.5-tonnes. The quick release

Norwegian Escape with Biggest Scrubbers sets Sail

On a sunny October day in the German harbor-town of Hamburg, M/V Norwegian Escape, a brand new cruise ship, sets sail for the first time. On board are five Yara SOx scrubbers – one for each engine.

Seagull's Software Tool for Benchmarking Seafarers Knowledge

Seagull Maritime has launched an advanced software tool able to benchmark seafarer knowledge levels, allowing shipowners and operators to compare their crew

Ocean Observation

Controversial Nicaragua Canal Project Postponed

China's Hong Kong Nicaragua Development (HKND) Co. said it is delaying the start of construction on a controversial $50 billion inter-ocean canal across Nicaragua until late 2016.

Suez Canal Pacts with SCCT-Maersk

Chairman of the Suez Canal Authority (SCA), Vice Admiral Mohab Mamish, signed a settlement agreement with the Suez Canal Container Terminal (SCCT-Maersk), says Daily News Egypt.

USNS Maury Completes Acceptance Trials

USNS Maury (T-AGS 66) completed Acceptance Trials, November 6, following a week of extensive ship tests and underway events, included testing of major propulsion,

Maritime Careers / Shipboard Positions Maritime Security Navigation Offshore Oil Pipelines Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0706 sec (14 req/sec)