Case study:Adams Mill enhancements

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Location: 52° 5' 51.58" N, 0° 45' 14.71" W

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Project overview

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Status	In progress
Project web site
Themes	Fisheries, Hydromorphology
Country	England
Main contact forename	Rob
Main contact surname	Clapham
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site
Partner organisations	MKAA, Woodland Trust.
Parent multi-site project
This is a parent project encompassing the following projects	No

Stabilization work commences

Project summary

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Site is location of a historically successful Barbel fishery. Recent deterioration has been noted by EA and Anglers at this location. Surveys have shown that the decline is likely to be a result of increased sediment load from collapsed banks undermined by signal crayfish activity, along with historic modification that have reduced the natural resilience of the river.

Measures undertaken and planned at this site include:

- Tree planting (started April 2014) 50 Willow whips planted in margins of river

- Further tree planting (Feb 2015) 100 Alder, 50 Hawthorn, 25 Oak, 25 Maple and other species, to be planted along this section of river with support from Woodlands Trust.

- Bank stabilization(started October 2014) 2 sections of bank stabilazation completed using brushwood bundles, staked into bank.

- Riffle enhancement(started October 2014) 1 riffle enhancement installed in October 2014. (2 Poplar logs staked and tied with fencing wire). 1 riffle ehancement to be installed in additional location in Feb 2015 (5 Poplar logs 2-4 m in length to be secured with 20mm re-bar. Logs to be in alternating orientations to maximise variation in scour patterns).

- Channel narrowing (expected 2015)

All work undertaken by Environment Agency with assistance from local volunteers.

Monitoring surveys and results

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Location of riffle enhancement 1 is existing WFD monitoring site for fish. Pre- and post-enhancement survey data will be available.

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 Anglian River basin Upper and Bedford Ouse Subcatchment River name Ouse (Cosgrove to Newport Pagnell) Area category 100 - 1000 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 113113 m <br />0.113 km <br />11,300 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Improved grassland Waterbody ID GB105033038000 Site Edit site Name Adams Mill WFD water body codes GB105033038000 WFD (national) typology Low, Medium, Calcareous WFD water body name Ouse (Cosgrove to Newport Pagnell) Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body Yes National/international site designation Local/regional site designations Protected species present No Invasive species present Yes Species of interest Dominant hydrology Dominant substrate River corridor land use Improved/semi-improved grassland/pasture Average bankfull channel width category 10 - 50 m Average bankfull channel width (m) Average bankfull channel depth category 2 - 5 m 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) 575575 m <br />0.575 km <br />57,500 cm <br /> Project started 2014/09/01 Works started 2014/10/03 Works completed Project completed Total cost category Less than 1 k€ Total cost (k€) Benefit to cost ratio Funding sources WFD GiA Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Less than 1 k€ Environment Agency Rob Clapham Stakeholder engagement and communication Less than 1 k€ Environment Agency Works and works supervision Environment Agency Rob Clapham Post-project management and maintenance Monitoring Less than 1 k€ Environment Agency Rob Clapham Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Invasive species, sediment, Flood protection maintenance works Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bank stabilization Floodplain / River corridor Planform / Channel pattern Increase in-channel hydromorphological diversity 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 Substrate conditions Yes No Yes Yes No Quantity & dynamics of flow No No Yes Yes No Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Fish Yes No No Yes No [[]] No No No No No 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 Habitat mapping No No Yes Yes No 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