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The deflectors, one at each bank, consist of a short line of vertical poles, angled upstream, to which are wired substantial bundles of brushwood and long faggots. These are permanent fixtures, in which silt and vegetation accumulates. Their aim is to improve the habitat for a wide range of animals. By diverting the stream to the centre they enhance its flow, thus scouring out the bed to make it more gravelly and improving oxygen levels. Fish find refuge in the 'pools' above the deflectors, and the silt and vegetation provide habitat for many species of invertebrate.
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The site is fairly inaccessible and can only be approached from private land but the effect should be to improve the wildlife we see in the river elsewhere. We will be looking to see what happens on our regular river sampling trips.
The agency has also been doing similar work in Hildersham, upstream of the village hall.
1 comment:
Something similar was done in the 1980s around the old sluice gates - around 1982/3/4 if I recall correctly. I can remember several groynes being made and a bit more care being taken of the river.
It included stocking with rainbow trout from the stretch between the welding institute and the little abington footbridge. It was a struggle home with 10+ trout in a plastic bag all having fallen to a piece of bread on a hook!
I think some brown trout were also stocked in the following years
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