Small-scale desiltation work at Bosherston Lakes

The view of Bosherston Lakes

What’s happening?

We're carrying out small-scale desiltation work on the Upper Eastern Arm of Bosherston Lakes. Working in partnership with Natural Resources Wales, the aim is to slow down the spread of reeds in the lake and retain an expanse of open water.

The next phase of work will take place between Monday 13 and Friday 17 November.

What is siltation and how does it affect Bosherston Lakes?

Siltation is the build-up of soil and sediment being carried into lakes from neighbouring land, usually as a result of heavy rain fall and the run-off of excess water.

Every year, the Eastern Arm is getting gradually shallower. The silt sometimes contains nutrients like nitrogen and potassium which encourage greater vegetation growth and the loss of open water that many of the species in the lake are dependent upon.

How will the work help?

The proposed desiltation work will help inform the future management and significance of the lakes. As a conservation charity, we need to determine what the best way is to manage the lakes in an affordable and sustainable means for the long-term.

We want to retain the open water, maintaining the habitat and ensuring people’s enjoyment of the view.

Will access be restricted during the work?

No, the work won’t impact on visitor access to the estate.

What else is the National Trust doing to care for Bosherston Lakes?

We're already working with Natural Resources Wales and neighbouring farmers and landowners to intercept the soil sediments before they can reach Bosherston Lakes. 

Preventative measures have been put in place including the installation of silt traps in the catchment streams and a focus on precision farming.

How do I find out more?

Keep checking back for updates, we'll be sharing project progress on the website and on our social media channels.