Living Waters for Wales Update

Welcome to our Water Framework Directive update, filled with projects which deliver a better water environment for the people, environment and businesses of Wales

Green Engineering Project helps restore river life

The Aeron is an important spawning ground for sea trout, salmon and brown trout.

We worked with Ceredigion Council and the landowner to find a natural solution, working with the river, rather than trying to constrain it.

The narrow bridge, built in the 1950s over the Afon Aeron in Llangeitho, Ceredigion, has caused erosion problems for decades. Previous efforts to solve the problem have only made things worse by creating a large gravel island and causing serious erosion upstream.

The bridge “pinched” the river, forcing it to go faster through the narrow space under the bridge and slowing the water down upstream. This caused sediment to drop, which gradually created the gravel island. By 2016, the gravel island was pushing the river wide, eroding both banks and attacking the gabion end on the left bank.

Some unwanted leylandii trees have been placed on the riverbank to prevent further erosion and two trees were partly inserted into the bank to divert the flow. This has created a natural barrier – called a “croy” – which protects the river bank and diverts the main river flow onto the gravel island.  This slowly reduces the gravel bed, creating pools for fish and leaving fine gravel which the fish need to spawn.

This green engineering solution by Ceredigion County Council, in partnership with NRW, has restored part of the River Aeron and created a better habitat for fish to spawn.  Contact Anne Lewis for more information.  Photo Credit (Anne Lewis, NRW)

 

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