Case study:Millfield Plantation 2

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Location: 51° 58' 54.58" N, 0° 24' 13.71" E

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Project overview

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Status	In progress
Project web site	http://http://www.essexrivershub.org.uk/
Themes
Country	England
Main contact forename	Kieren
Main contact surname	Alexander
Main contact user ID	User:KierenAlexander
Contact organisation	Essex Wildlife Trust
Contact organisation web site	http://http://www.essexwt.org.uk/
Partner organisations
Parent multi-site project	Essex healthy headwaters
This is a parent project encompassing the following projects	No

Back Channel to be restored

Project summary

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The River pant in this location has undergone a high degree of physical modification and has limited or no connectivity with the floodplain on either bank. As such the project proposes to reconnect the surrounding meadows, creating a secondary channel and some wet grassland.

To do this it is proposed that a 300mm pipe is installed approximately at a height that will allow regular inundation, especially during high rainfall events and will facilitate the creation of the back channel.

The back channel will then be further enhanced by limited excavation and pool creation to form bays and hold water during periods of drought.In the main river we plan to install some woody debris. This is an area that suffers repeatedly from drying out in the summer months causing issues with the fish populations and a reduction of in stream diversity.

By installing the woody debris we hope to create some riverbed diversity which will create pools and hold water for longer in the summer months, the flow deflectors will also hold water back in the catchment and alleviate conditions for fish. The faster moving water will also oxygenate the water and provide better conditons for fish fry and spawning fish.

Monitoring surveys and results

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Fixed point photography will be utilised to monitor any changes in vegetation and land forming.

Lessons learnt

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Anglian River basin Combined Essex Subcatchment River name Blackwater Pant Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 6868 m <br />0.068 km <br />6,800 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105037033860 Other case studies in this subcatchment: Bocking Blackwater River Restoration 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 Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information