Case study:River Glaven conservation group

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Location: 52° 54' 7", 1° 3' 40"
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Project overview

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Status Complete
Project web site
Themes Economic aspects, Fisheries, Monitoring, Spatial planning
Country England
Main contact forename Ian
Main contact surname Shepherd
Main contact user ID
Contact organisation River Glaven Conservation Group
Contact organisation web site http://www.riverglaven.co.uk/
Partner organisations Wild Trout Trust
Parent multi-site project
This is a parent project
encompassing the following
projects
No
River narrowing using locally coppiced hazel trees

Project summary

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The objectives of the project were to improve the in-river habitat upstream from Letheringsett Ford, to re-connect the river and floodplain and to develop an experience base which would serve the River Glaven Conservation Group (RGCG) well on other projects.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

Catchment

River basin district Anglian
River basin North Norfolk

Subcatchment

River name Glaven
Area category 10 - 100 km²
Area (km2)
Maximum altitude category 100 - 200 m
Maximum altitude (m) 103
103 m
0.103 km
10,300 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB105034055780



Other case studies in this subcatchment: Nine Chalk Rivers Project - Glaven Catchment, River Restoration at Hunworth (River Glaven)


Site

Name Glaven
WFD water body codes GB105034055780
WFD (national) typology
WFD water body name Glaven
Pre-project morphology Single channel, High width:depth
Reference morphology Single channel, Sinuous, Pool-riffle
Desired post project morphology
Heavily modified water body Yes
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest
Dominant hydrology Quick run-off
Dominant substrate Gravel, Bedrock, Cobble
River corridor land use Extensive agriculture, Woodland, Grassland
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m)
Average bankfull channel depth category 0.5 - 2 m
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) 400 m
0.4 km
40,000 cm
Project started 2003/01/01
Works started 2006/01/01
Works completed 2006/01/01
Project completed
Total cost category 1 - 10 k€
Total cost (k€) 8 k€
8,000 €
Benefit to cost ratio
Funding sources Wild Trout Trust, Environment Agency

Cost for project phases

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

Supplementary funding information

Funding also provided by the Cinderella Chalk Rivers Project



Reasons for river restoration

Mitigation of a pressure
Hydromorphology Channel pattern/planform, Continuity of sediment transport
Biology Fish: Abundance
Physico-chemical
Other reasons for the project Landscape enhancement, Fisheries


Measures

Structural measures
Bank/bed modifications Re-profiling, Introducing large woody debris, Introduction of gravel
Floodplain / River corridor Connection to wider floodplain
Planform / Channel pattern Channel narrowing, Creation of braided channel
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


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
Before measures After measures Qualitative Quantitative
Fish: Abundance Yes Yes Awaiting results

Physico-chemical quality elements

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

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



Additional documents and videos


Additional links and references

Link Description
http://therrc.co.uk/case studies/cinderella%20chalk%20rivers.pdf Cinderella Chalk Rivers overview
http://therrc.co.uk/case studies/rgcg%20report.pdf RGCG in-river habitat improvement 2006 Report
http://therrc.co.uk/case studies/wtt%20award%20winner.pdf The Glaven Project wins the annual Wild Trout Trust and Orvis Conservation Awards 2007 Professional Category
http://therrc.co.uk/case studies/glaven%20restoration%20project.pdf The River Restoration Centre Case Study Series - Summary of River Glaven Restoration Project

Supplementary Information

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The project was named as the winner of the Professional Category at the 2007 Wild Trout Trust and Orvis Conservation Awards, reinforcing it's position as a good example of a successful river restoration project.