Case study:Salisbury Avon Restoration Project

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Project overview

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Status	In progress
Project web site
Themes	Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	John
Main contact surname	Rattray
Main contact user ID
Contact organisation	Wiltshire Wildlife Trust, Environment Agency, Natural England, Wessex Wa-ter, Wiltshire Fishery Association
Contact organisation web site	http://www.wiltshirewildlife.org
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The Hampshire Avon has historically been dredged, over-widened and impounded in many places due to past river management. This has led to a reduction in the river’s geomorphological processes, which has, in turn, led to a decline in the habitat quality and quantity throughout the reach. This decline, despite recent sympathetic management, has continued due to the lack of variation in channel form and flows, as well as riparian land use. This project focuses on two 750m reaches of the Hampshire Avon at Figheldean and West Amesbury, identified in the Strategic Framework for the Restoration of the River Avon (SFfRRA) as being in need of restoration for habitat quality. The restoration aims to return a more natural flow regime at the two sites, in order to promote natural bed scouring and increase riparian habitat for a variety of organisms.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Site

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Name	Hampshire Avon
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology	Re-meandering
Desired post project morphology
Heavily modified water body	No
National/international site designation
Local/regional site designations
Protected species present	No
Invasive species present	No
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
Average bankfull channel width category
Average bankfull channel width (m)
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Project background

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Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
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Reasons for river restoration

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Mitigation of a pressure
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Measures

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Structural measures
Bank/bed modifications	Creation of gravel riffles to create fish spawning habitat and flow variation
Floodplain / River corridor	Tree planting for channel shading and to provide future woody de-bris;
Planform / Channel pattern	Re-meandering of channelized sections, through the creation of berms and the use of woody debris, to restore natural deposition/erosion processes; the narrowing of over-widened channels to promote bed scouring and increase Ranunculus growth.
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Monitoring

Hydromorphological quality elements

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quality elements

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quality elements

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quality elements

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Supplementary Information

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