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Start Date
01
October, 2014
End Date
31
March, 2015
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River Nar, Pentney

The Pentney Restoration Project

The River Nar has been historically modified for human use, changing its channel size and shape, and in places the river’s course. These changes have negatively impacted on the wildlife of the river. The River Nar below Narborough is heavily modified flowing between steep flood banks, with little in stream character. This project, which runs from Pentney Abbey to Blackborough End (see map), looks at improving habitat diversity and wildlife.

Pentney map for brief

 

 

 

 

The project was completed in March 2015 with satisfying results. Works that were carried out included:

  • Re-profiling to create a shallower bank

This work will enable vegetation to grow and establish easier encouraging a different array of species.

  • The creation of riffles and bars

Riffles and bars vary the flow of water creating niches for flora and fauna that love the fast flowing shallow waters with gravel bed.

  • Removal of timber revetments and flow deflectors

The removal of these man made structures will bring the river back into a more natural state. The extra features that are installed such as the woody debris will do a better and more natural looking job than the previous ones.

  • Install brushwood faggots into the channel

Faggots when in position protect the newly formed bars that narrow the channel. The new bars will quickly erode if not reinforced with this bundles of branches. These bundles will in time be hidden by deposited material and macrophyte growth.

  • Install large woody debris

These installations will provide areas of protected water that fish and their fry will be able to seek refuge. The woody debris will also vary the flow of the water and help narrow the channel.

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Faggots being installed on the newly formed berm

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Digger creating the new berm to narrow the channel

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Digger helping to install large woody debris

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The berm has been created narrowing the channel

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Vegetation growing on the new berm

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Woody debris in place disrupting the water flow

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Aerial view of the restoration during its first growing season

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Aerial view of the work