Case study:Gunville Phase I

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Location: 51° 13' 14.48" N, 1° 46' 51.48" W

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Fisheries, Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	Martijn
Main contact surname	Antheunisse
Main contact user ID	User:Martijnantheunisse
Contact organisation	Wiltshire Wildlife Trust
Contact organisation web site	http://www.wiltshirewildlife.org
Partner organisations	Environment Agency, Natural England, Wessex Water, Wiltshire Fishery Association
This is a parent project encompassing the following projects

Gunville Phase I

Project summary

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Commissioned by Wiltshire Wildlife Trust and funded through a successful Catchment Restoration Fund bid, Cain Bioengineering submitted a very professional interpretation for the 750m stretch of river, incorporating a mixture of geotextile and earth back-fill berms, brushwood sediment traps, gravel riffles, large woody debris and live tree hinging. The general theme of the works was remeandering, channel narrowing and bank regrading. The creation of off-line ponds provided fill for the geotextile berms and created valuable riparian habitat. Due to the nature of the site and the partners involved (being part of the MoD training estate, with fishing rights given to theServicesDry Fly Fishing Association (SDFFA)), stakeholder consultation was crucial in the on-going development of the project. As a result of this consultation and mitigation for Water vole (Arvicola terrestris), designs had to be adapted several times during the project, leading to a bespoke, dynamic restoration which should be readily able to withstand the variety of pressures faced by the river.

Monitoring surveys and results

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Monitoring consists of invertebrate surveys, electro-fish surveys and fixed-point photography. Data was collected throughout 2013 and 2014 through volunteer effort. Results have yet to be analysed.

Lessons learnt

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Future projects should incorporate time for delays such as flooding, water vole mitigation and other potential difficulties. Despite not being public land, improved communications with local residents would have made progress much smoother.

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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 Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information