Case study:France Farm (Phase 1) A 9

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Location: 51° 18' 7.22" N, 1° 48' 48.04" W
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Project overview

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Status Complete
Project web site http://www.environment-agency.gov.uk/homeandleisure/wildlife/119594.aspx
Themes Environmental flows and water resources, Fisheries, Habitat and biodiversity, Hydromorphology
Country England
Main contact forename Mike
Main contact surname Porter
Main contact user ID
Contact organisation Environment Agency
Contact organisation web site http://www.environment-agency.gov.uk
Partner organisations Natural England
Parent multi-site project

Case_study:Strategic Framework for Restoration of the River Avon (SFfRRA)

This is a parent project
encompassing the following
projects
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Project picture

Project summary

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This reach is located at France Farm and is 907m in length. The reach includes France Farm hatch, which consist of 2 hatch boards (recently replaced), and causes a major barrier to fish migration and the impoundment extends upstream for around 1km. There is also a stocked fishing pond which is maintained by an offtake from the impounded upstream river. The project involved lowering the level of an existing online pond which allowed for the full and permenant opening of all the hatches on the main river. The proposed works on the main river upstream of the structre will be delayed until observations of any geomorphological change on the river.

Monitoring surveys and results

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No monitoring was undertaken. Observation of morphological change upstream of the opened hatches to determine level of future in channel works required.

Lessons learnt

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Image gallery


River before hatches opened
River after hatches opened
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Catchment and subcatchment

Catchment

River basin district South West
River basin Hampshire Avon

Subcatchment

River name Hampshire Avon (West)
Area category 10 - 100 km²
Area (km2)
Maximum altitude category 200 - 500 m
Maximum altitude (m) 202202 m <br />0.202 km <br />20,200 cm <br />
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB108043022370



Other case studies in this subcatchment: Charlton St Peter A 8


Site

Name
WFD water body codes GB108043022370
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 2013/09/01
Works started
Works completed
Project completed 2013/10/01
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources

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
Biology hatches acting as a barrier to fish migration
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor
Planform / Channel pattern opening up of hatches to reconnect reaches of the river
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



Additional documents and videos


Additional links and references

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Supplementary Information

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