Case study:New Forest Life III project

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Location: 50° 50' 20", -1° 34' 53"
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Project overview

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Status Complete
Project web site http://www.therrc.co.uk/sites/default/files/projects/1_newforest.pdf
Themes Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - forestry, Monitoring
Country England
Main contact forename Maxine
Main contact surname Holden
Main contact user ID
Contact organisation Environment Agency
Contact organisation web site http://www.gov.uk/government/organisations/environment-agency
Partner organisations
Parent multi-site project
This is a parent project
encompassing the following
projects
No
Project picture

Project summary

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The New Forest is one of the largest remaining areas in western Europe supporting a mosaic of heathland, wetlands and semi-natural forest. It has been designated as a Special Area of Conservation (SAC) under the Habitats Directive in 2004 and has been a National Park since 2005. In 2003, with 40% EU LIFE 3 funding, a 4-year project began to restore the streams and wetlands within the Lymington River, Avon Water and Hampshire Avon catchments. This involved reinstating the characteristic sinuous course of the streams, adding large wood to channels, reconnecting floodplains and old meanders and restoring the characteristic wetlands and riparian forest. A total of 10 km of degraded, straightened rivers were restored through floodplain reconnection, reinstating or reconnecting old meanders, and adding wood to the channel (upper tributaries of the Lymington River only). These restoration measures together resulted in a 21% reduction of flood peak magnitude and a 33% increase in flood peak travel time for flows that were less than 1m3s-1 (equal to a 2-year recurrence interval). The project also resulted in the restoration of 261ha of riparian woodland, 18ha of bog woodland, 184ha of valley mires and 141ha of wetland habitats.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment



Site

Name Lymington River
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
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)
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

Reach length directly affected (m)
Project started 2002/01/01
Works started
Works completed
Project completed
Total cost category
Total cost (k€) £2.9m
"£" is not declared as a valid unit of measurement for this property.
Benefit to cost ratio
Funding sources EU LIFE Programme, Partnership contributions

Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
Investigation and design
Stakeholder engagement and communication
Works and works supervision
Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure Flood risk management
Hydromorphology
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor Habitat diversification
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
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Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
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Physico-chemical quality elements

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Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



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Additional links and references

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Supplementary Information

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