An unusual craft has been deployed by Penarth Quays Marina to help staff tackle the – literally – growing problem of underwater weed.
The comparatively warm, still, shallow fresh waters of Penarth Marina have proved to be ideal conditions for the proliferation of large frond-like plants which proliferate beneath the pontoons and moored craft in both of the marina’s basins.
The weed is also encouraged to grow by the oxygen being constantly piped-in from the sea-bed beneath by the Cardiff Bay sub-surface aeration system – intended to improve the water quality.
Manual “weeding” of the marina has proved to be a huge job with several skips being filled with weed by marina staff – with help from several berth-holders.
This week Quay Marinas are trialing a mechanical system to see if the arduous job can be speeded up. An American-made Truxor weed-cutter to tackle the worst of the weed.
Some of the weeds growing up from the mud bed of the marina – can be more than 12 feet long.
The rotating paddle wheels and the weed-cutter attachments seem to be effective at dislodging the worse of the weed which craft can then collect.