Case study:Habitat Improvement: Stonebridge River Reserve, Og and Marlborough Fish Migration

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Location: 51° 25' 18", -1° 41' 55"
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Project overview

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Status In progress
Project web site
Themes Fisheries, Hydromorphology
Country England
Main contact forename Charlotte
Main contact surname Hitchmough
Main contact user ID
Contact organisation Action for the River Kennet (ARK)
Contact organisation web site
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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This project will improve habitat for fish by modifying in stream morphology, cleaning gravels and removing a significant barrier to migration. This will benefit brown trout and grayling by improving opportunities for spawning, increasing habitat for juvenile fish and allowing fish to access and repopulate the upper reaches of the Kennet.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

Catchment

River basin district Thames
River basin Kennet and Pang

Subcatchment

River name Middle Kennet (Marlborough to Newbury)
Area category 100 - 1000 km²
Area (km2)
Maximum altitude category 200 - 500 m
Maximum altitude (m) 264
264 m
0.264 km
26,400 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB106039023172



Other case studies in this subcatchment: Eastridge Estate restoration project, River Kennet Restoration at Durnsford


Site

Name
WFD water body codes GB106039023172
WFD (national) typology
WFD water body name Middle Kennet (Marlborough to Newbury)
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 2012/07/01
Works started
Works completed
Project completed 2015/03/01
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources Defra Catchment Restoration Fund

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
Hydromorphology Channel pattern/planform, Substrate conditions, Width & depth variation
Biology Fish
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Bank reprofiling, Removal of fish barriers, Creation of fish passes
Floodplain / River corridor
Planform / Channel pattern
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

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




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Additional links and references

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Supplementary Information

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