Tests on New Type of Floating Reed Marsh

Deltares has tested a new type of floating willow mattress. It keeps the reed marsh that develops on top floating for longer than the present ‘sinking’ reed marshes.

The new type provides better wave attenuation than the older structure. As a result, these floating reed marshes help to defend shores and therefore improve flood protection, ultimately generating savings for water management authorities. The wave attenuation of the new mattress was tested last week in a range of conditions and wave patterns in the Delta Flume at Deltares, The Netherlands.

Floating reed marshes are used throughout the world, primarily to improve biodiversity or water quality, but not for flood protection. Deltares initial attempt in 2010 to enhance flood protection using floating reed marshes partially failed because, in time, they sank.

A new type of willow mattress was developed for the current trial. It is expected to keep floating for a long period. Plastic floats and willow rolls have been attached to the mattress. The floats stop the mattress from sinking and the rolls provide additional wave attenuation.

Victor Beumer, an ecologist with Deltares and the project leader, said: “In a pilot setting the mattress can be designed to be between fifty and one hundred meters long. They can be used in front of the shores of lakes where management agencies want to improve the marsh habitat and improve flood defenses. But they can also be positioned in harbors, when there is enough room, to damp down waves generated by passing ships. We are also thinking about how to use them in rivers.”

Now that the trial has been a success, Rijkswaterstaat and Deltares hope that the new structure can be put into practice.

Press Release

Share this article

Follow Dredging Today

Events>

<< Jul 2019 >>
MTWTFSS
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 1 2 3 4

Eastern Chapter WEDA Fall 2019 Conference

Wednesday (10/16/19) afternoon will start the program with an opportunity to take the Dredging 101 course.

read more >

10TH Annual Conference Dredging in India

The conference will focus on strategies and solutions to meet the future dredging requirements…

read more >

Australasian Coasts and Ports 2019

Conference Theme “Future directions from 40°S and beyond” reflects the increasing awareness about the need to find suitable…

read more >

PORTS Conference

The PORTS Conference series is internationally recognized as an outstanding opportunity to network with…

read more >

Jobs>

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below...

apply

Looking to fill a job opening?

By advertising your job here, on the homepage of DredgingToday.com, you'll reach countless professionals in the sector. For more information, click below....

apply

Dredging jobs in Abu Dhabi at NMDC

National Marine Dredging Company “NMDC” aims to be the largest dredging player in the Arab’s Gulf region...

apply