Case study:Lower Woodsford

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Location: 50° 43' 9.63" N, 2° 18' 58.73" W

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Project overview

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Status	In progress
Project web site
Themes	Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	Aly
Main contact surname	Maxwell
Main contact user ID	User:Alymaxwell
Contact organisation	Environment Agency
Contact organisation web site
Partner organisations
Parent multi-site project	Case_study:River Frome Rehabilitation Plan
This is a parent project encompassing the following projects	No

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Project summary

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The upper reach of the Lower Woodsford Channel has been historically straightened but there are now signs of recovery. The option for this reach is for ‘Assisted Natural Recovery’. Riffles and berms are developing which are improving the channel condition. Dredging in the lower reaches has removed in channel features such as riffles and glides resulting in a low variety of flow patterns. This also limits the range of habitats and species that the river can support. A deep drainage ditch had been created in the 1970’s running parallel and south to the river for nearly 1800m’s. The material this generated was used to embank the river to reduce flood flows. There’s a lack of riparian trees and shrubs in this management unit. Trees provide habitat at the river banks for insects and birds. Trees also provide shade which helps reduces the river temperature creating better conditions for fish. The majority of floodplain land to the south of the river has been in arable production since the drainage activities. This limits the river corridor habitat value and allows sediment runoff to enter the river affecting in channel ecology. Soils and silts enter the channel covering gravels that Salmon and Trout spawn on, which reduce their reproductive success. Proposed works will consist of: • riparian tree planting • introduction of large woody debris • embankment removal • removal of hard bank protection • ditch reprofiling • channel and scrape creation

Monitoring surveys and results

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Several monitoring technqiues will be employed as part of this project including:

Fixed point photography SEdiment sampling Electro Fishing Aerial Photography

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present 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 Edit 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit 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 Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents 2e Lower Woodsford Project Record DRAFT.pdf Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information