Case study:River Frome Rehabilitation Plan: Difference between revisions

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{{Case study status
{{Case study status
|Approval status=Draft
|Approval status=Approved
}}
{{Location
|Location=50.717880379209454, -2.4380314350128174
}}
}}
{{Location}}
{{Project overview
{{Project overview
|Status=In progress
|Status=In progress
|Project web site url=www.gov.uk
|Project web site url=www.therrc.co.uk/sites/default/files/projects/4_dorsetfrome.pdf
|Themes=Environmental flows and water resources, Fisheries, Flood risk management, Habitat and biodiversity, Hydromorphology, Water quality
|Themes=Environmental flows and water resources, Fisheries, Flood risk management, Habitat and biodiversity, Hydromorphology
|Country=England
|Country=England
|Main contact forename=Alastair
|Main contact forename=Alastair
|Main contact surname=Maxwell
|Main contact surname=Maxwell
|Main contact id=Alymaxwell
|Contact organisation=Environment Agency
|Contact organisation=Environment Agency
|Contact organisation url=www.gov.uk
|Contact organisation url=www.environment-agency.gov.uk/homeandleisure/wildlife/141723.aspx
|Partner organisations=Natural England,
|Multi-site=Yes
|Multi-site=Yes
|Project summary=The Environment Agency and Natural England are working together with their partners to restore the river towards a more favourable condition and achieve their vision for the River Frome SSSI.
|Project picture=5590.JPG
 
|Picture description=River Frome Dorset
Actions to restore the physical structure of the river to an improved condition for ecology have been set out in the River Frome Rehabilitation Plan.  The plan aims to use the linkages between ecology and geomorphology identified in the accompanying Technical Report to identify opportunities and constraints for managing, conserving and enhancing the river and returning the SSSI to favourable or recovering condition.  The plan suggests a range of catchment-scale and reach-based solutions that if implemented will help to restore the river to favourable condition.  The plan then identifies the actions needed to deliver the solutions and prioritises which should be taken over the short, medium and long term.  The ultimate goal is to move towards a more naturally functioning and un-constrained system that is able to adjust and respond to changes without constant management.  However, it is recognised that the River Frome supports a wide range of other interests in addition to ecology (e.g. agriculture and fisheries) and that all of these need to be taken into account when planning actions. 
|Project summary=The Environment Agency and Natural England are working together with their partners to restore the river towards a more favourable condition and achieve their vision for the River Frome SSSI. In order to produce a plan for the physical rehabilitation of the River Frome SSSI, a catchment wide fluvial geomorphological study has been undertaken to assess the physical functioning of the river, and how it impacts on the river ecology.  
 
PROJECT AIMS
 
Where possible the delivery of the River Rehabilitation will:
 
• minimise material brought to site
 
• to have zero waste taken to landfill
 
• use materials won from site i.e. wood, back fill and gravel


• to minimise use of imported gravel
Actions to restore the physical structure of the river to an improved condition for ecology have been set out in the River Frome Rehabilitation Plan. The plan aims to use the linkages between ecology and geomorphology identified in the accompanying Technical Report to identify opportunities and constraints for managing, conserving and enhancing the river and returning the SSSI to favourable or recovering condition. The plan suggests a range of catchment-scale and reach-based solutions that if implemented will help to restore the river to favourable condition. The plan then identifies the actions needed to deliver the solutions and prioritises which should be taken over the short, medium and long term. The ultimate goal is to move towards a more naturally functioning and un-constrained system that is able to adjust and respond to changes without constant management.
|Monitoring surveys and results=There is not an integrated monitoring plan as part of the River Frome Rehabilitation Plan.


• minimise cost of design by keeping ‘in-house’
On a project by project basis one of or a combination of the following monitoring techniques is understaken; Fixed point photography Electrofish sampling Sediment sampling Condition Assessment )SSSI)
 
|Lessons learn=As a strategic catchment plan ecah individual project allows for lessons to be learnt for future projects. Thes einclude amending in channel technqiues to more effective way of bringing gravels to site to more innovative ways of utlising material son site to reduce waste.
• deliver individual projects through partnership (FPWDFA, Dorset Wildlife Trust)
 
• to support existing and future river rehabilitation initiatives
|Monitoring surveys and results=The River Frome from Dorchester to Wareham is designated as a Site of Special Scientific Interest (SSSI) due to the important chalk river and lowland, low gradient river habitats it supports.  These habitats support a diverse range of aquatic plants, invertebrates, fish, birds and mammals.  The condition of these habitats is assessed by Natural England against specific conservation objectives that have been formulated for the site.  The most recent assessment, which was undertaken in 2009, shows that the SSSI does not meet the standards required in the conservation objectives, and is therefore in unfavourable condition. 
 
The SSSI is in unfavourable condition for a number of reasons, including historical modifications to the physical structure of the river channel, its banks and riparian zone, and the way in which flow is divided between multiple channel sections. These have resulted in a straightened, over deepened channel that has very little geomorphological diversity, uniform flows, and enhanced siltation.  Our vision is to improve the ecological health of the river by enhancing the characteristic habitats needed for the wildlife to recover and thrive which includes a diverse range of in-channel habitat features, clean gravels and mosaics of species rich riverside vegetation and wetlands connected to the river.
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{{Case study subcatchment}}
{{Case study subcatchment
{{Site}}
|Subcatchment=Frome Dorset (Lower) & Furzebrook Stream
}}
{{Site
|WFD water body code=GB108044009690
|WFD water body name=Frome Dorset (Lower) & Furzebrook Stream
|Heavily modified water body=No
|Protected species present=No
|Invasive species present=No
}}
{{Project background}}
{{Project background}}
{{Motivations}}
{{Motivations
|Hydromorphological quality elements=Channel pattern/planform, Freshwater flow regime,
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{{Measures}}
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{{Additional Documents end}}
{{Additional Documents end}}
{{Additional links and references header}}
{{Additional links and references header}}
{{Additional links and references
|Link=www.environment-agency.gov.uk/static/documents/Leisure/Frome_Catchment.pdf
|Description=Map of the Frome Catchment
}}
{{Additional links and references
|Link=www.flickr.com/photos/environment-agency/sets/72157631436764420/with/7944192558/
|Description=Frome Enhancements 2012
}}
{{Additional links and references footer}}
{{Additional links and references footer}}
{{Supplementary Information}}
{{Supplementary Information}}
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Latest revision as of 11:25, 1 November 2018

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Location: 50° 43' 4.37" N, 2° 26' 16.91" W
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Project overview

Edit project overview
Status In progress
Project web site http://www.therrc.co.uk/sites/default/files/projects/4_dorsetfrome.pdf
Themes Environmental flows and water resources, Fisheries, Flood risk management, Habitat and biodiversity, Hydromorphology
Country England
Main contact forename Alastair
Main contact surname Maxwell
Main contact user ID User:Alymaxwell
Contact organisation Environment Agency
Contact organisation web site http://www.environment-agency.gov.uk/homeandleisure/wildlife/141723.aspx
Partner organisations Natural England
This is a parent project
encompassing the following
projects 		2e Lower Woodsford River and Floodplain Enhancement, Bockhampton Enhancement, Hurst Bridge (downstream), Louds Mill (Downstream)m Enhancement, Lower Bockhampton, Lower Woodsford, Martins River Island, Moreton Channel Gravel Reprofiling, North Channel Upper Reach, Unit 1b - Long Bridge to Downstream of Louds Mill, Unit 3a – Hurst Bridge 2013, Unit 4 - North Channel Phase 1, Woodsford Channel
River Frome Dorset

Project summary

Edit project overview to modify the project summary.


The Environment Agency and Natural England are working together with their partners to restore the river towards a more favourable condition and achieve their vision for the River Frome SSSI. In order to produce a plan for the physical rehabilitation of the River Frome SSSI, a catchment wide fluvial geomorphological study has been undertaken to assess the physical functioning of the river, and how it impacts on the river ecology.

Actions to restore the physical structure of the river to an improved condition for ecology have been set out in the River Frome Rehabilitation Plan. The plan aims to use the linkages between ecology and geomorphology identified in the accompanying Technical Report to identify opportunities and constraints for managing, conserving and enhancing the river and returning the SSSI to favourable or recovering condition. The plan suggests a range of catchment-scale and reach-based solutions that if implemented will help to restore the river to favourable condition. The plan then identifies the actions needed to deliver the solutions and prioritises which should be taken over the short, medium and long term. The ultimate goal is to move towards a more naturally functioning and un-constrained system that is able to adjust and respond to changes without constant management.

Monitoring surveys and results

Edit project overview to modify the Monitoring survey and results.


There is not an integrated monitoring plan as part of the River Frome Rehabilitation Plan.

On a project by project basis one of or a combination of the following monitoring techniques is understaken; Fixed point photography Electrofish sampling Sediment sampling Condition Assessment )SSSI)

Lessons learnt

Edit project overview to modify the lessons learnt.


As a strategic catchment plan ecah individual project allows for lessons to be learnt for future projects. Thes einclude amending in channel technqiues to more effective way of bringing gravels to site to more innovative ways of utlising material son site to reduce waste.


Image gallery


ShowHideAdditionalImage.png


Catchment and subcatchment

Catchment

River basin district South West
River basin Dorset

Subcatchment

River name Frome Dorset (Lower) & Furzebrook Stream
Area category 100 - 1000 km²
Area (km2)
Maximum altitude category 200 - 500 m
Maximum altitude (m) 223223 m <br />0.223 km <br />22,300 cm <br />
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Arable and Horticulture
Waterbody ID GB108044009690



Other case studies in this subcatchment: 2e Lower Woodsford River and Floodplain Enhancement, Bockhampton Enhancement, Hurst Bridge (downstream), Louds Mill (Downstream)m Enhancement, Lower Bockhampton, Lower Woodsford, Martins River Island, Moreton Channel Gravel Reprofiling, North Channel Upper Reach, Unit 1b - Long Bridge to Downstream of Louds Mill... further results


Site

Name
WFD water body codes GB108044009690
WFD (national) typology
WFD water body name Frome Dorset (Lower) & Furzebrook Stream
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
Works started
Works completed
Project completed
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 Channel pattern/planform, Freshwater flow regime
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications
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



Additional documents and videos


Additional links and references

Link Description
http://www.environment-agency.gov.uk/static/documents/Leisure/Frome Catchment.pdf Map of the Frome Catchment
http://www.flickr.com/photos/environment-agency/sets/72157631436764420/with/7944192558/ Frome Enhancements 2012

Supplementary Information

Edit Supplementary Information


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