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- Notes Presentations and Actions from Consultative
Cambridgeshire and Bedfordshire – Fisheries Monitoring Programme
All work in-channel completed in 2.5 days (Monday 9th - Wednesday 11th September 2013).
An EA funded project – contact James Hooker
Fish Refuge at Costessey and works at Sculthorpe
When a landowner asked us to take a look at a local area of eroding bank on the River Wensum at Costessey, the easiest solution would have been to fill it in. However, during a site visit we realised the erosion had created a valuable fry bay, a feature which is uncommon along this otherwise uniform stretch of river.
At Sculthorpe we have learnt from past experiences by moving away from a prescriptive design solution. Instead we have relied on the skills and experience of our North Norfolk Field Operations Team, to determine the finer detail based on how the river reacts to restoration features as they are being constructed.
INSTALLATION OF WOODY DEBRIS, BERMS, POOLS AND GLIDEs
The River Tat is a tributary of the River Wensum and forms part of the River Wensum Site of Special Scientific Interest. The planform and channel geometry has historically been subjected to significant modification including diversions, straightening, widening and the construction of an online lake system.
The aim of the restoration work was to ‘kick start’ natural morphological processes throughout the reach.
A key restoration measure has been the installation of Large Woody Debris (LWD). Reducing tree cover in heavily shaded areas, by selective coppicing, provides a sustainable source of material. This also allows light onto the river, promoting marginal vegetation to establish. LWD has introduced flow diversity, helping keep the gravels free from silt and providing overhead cover for fish.
LOFFCA has been seeking a solution to the annual problem of managing poor water quality within the river Delph, from either summer flooding of the washes or zero flows within the river. After several years of seemingly slow progress, the problem has been recognised that some action is required and following a meeting with all the respective partners on the 16th April 2015 an action plan has been agreed. The minutes of this meeting are available to download above. Thanks must go to Mike Nunns for driving this issue within the EA and bringing the partners together. A link to the sonde live data is also available below.