Case study:Holmsley Inclosure Stream Restoration

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Location: 50° 48' 0.41" N, 1° 41' 4.88" W

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Habitat and biodiversity, Hydromorphology, Monitoring
Country	England
Main contact forename	Bryan
Main contact surname	Boult
Main contact user ID
Contact organisation	Hampshire County Council
Contact organisation web site	http://www.hants.gov.uk/
Partner organisations	English Nature, Environment Agency, Forestry Commission, National Trust, RSPB
Parent multi-site project	Case_study:New Forest LIFE project
This is a parent project encompassing the following projects	No

File:Holmsley Enclosure Stream.jpg

Bed level raising in progress

Project summary

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This site is a part of New Forest LIFE project. The bed levels were raised for approximately 500m of the existing Stony Moors stream between the enclosure boundary and the fords on the public road. Levels were raised to within 0.4m of the surrounding floodplain to restore winter flooding on the flood plain. This was achieved using clay plugs and backfilling with imported hoggin and available bank spoil. Due to the steep gradient additional support was given to the infill in the form of log weirs, oak boards and live willow. Alongside the river bed restoration 8.8 hectares of scrub management and vegetation clearance was made.

Monitoring surveys and results

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Lessons learnt

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Image gallery

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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 South East River basin New Forest Subcatchment River name Avon Water Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 8282 m <br />0.082 km <br />8,200 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Improved grassland Waterbody ID GB107042011300 Other case studies in this subcatchment: Avon Barriers Project, Avon Barriers Project: Ferengair Weir, HLS New Forest Site Edit site Name Holmsley Inclosure Stream WFD water body codes GB107042011300 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 Edit project background Reach length directly affected (m) Project started 2002/07/01 Works started Works completed Project completed 2006/12/31 Total cost category 50 - 100 k€ Total cost (k€) Benefit to cost ratio Funding sources EU Life Programme 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 Width & depth variation Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bed raising, Tree works 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 http://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.showFile&rep=file&fil=LIFE02 NAT UK 008544 AfterLIFE.pdf After LIFE conservation plan http://www.newforestlife.org.uk/life3/life3index.htm New Forest LIFE 3 web page http://ec.europa.eu/environment/life/project/Projects/index.cfm?fuseaction=home.createPage&s ref=LIFE02%20NAT/UK/008544&area=1&yr=2002&n proj id=1976&cfid=423407&cftoken=1adf75e7742a0a31-858CC2AB-CCBA-042D-07FCA090D1A64E01&mode=print&menu=false New Forest on EU LIFE programme Supplementary Information Edit Supplementary Information