Case study:The Axe and Exe River Improvement Project (AERIP)

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Location: 50° 54' 8.60" N, 3° 29' 25.39" W
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Project overview

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Status Complete
Project web site
Themes Economic aspects, Flood risk management, Habitat and biodiversity, Social benefits, Water quality
Country England
Main contact forename John
Main contact surname Hickey
Main contact user ID
Contact organisation Westcountry Rivers Trust
Contact organisation web site http://www.wrt.org.uk/
Partner organisations EA, South West Water, NE, Forestry Commission, Exmoor National Park Authoity, River Exe Foundation, Exe Mitigation Group, River Exe and Tributaries Association, Cannington College Bridgewater Students, Axe Vale River Association, Axe Fly Fishers, Taunton Fly Fishers, East Devon AONB, Dorset AONB, Blackdown Hills AONB, South West Rivers Association
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Project summary

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The Axe and Exe River Improvement Project (AERIP) is a partnership project using Catchment Restoration Funds to undertake river catchment restoration on the Axe and Exe. The partnership, led by the Westcountry Rivers Trust, has been carrying out river restoration and undertaking works to address the causes of Water Framework Directive issues for many years. Through restoration work the project will address issues including: barriers to fish migration, preventing fish from reaching their natural spawning grounds; diffuse pollution, the run-off of soil and nutrients which cause damage to spawning grounds and a negative impact on the wider river ecology;interrupted conveyance of river gravels reducing the spawning habitat for trout and salmon; degraded river corridor habitat, including the impacts from abandoned tree coppice and excessively eroded and poached riverbanks damaged by stock access.

Monitoring surveys and results

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Catchment and subcatchment



Site

Name Axe and Exe Catchments
WFD water body codes GB108045015050, GB108045008870
WFD (national) typology
WFD water body name AXE, EXE
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

Reach length directly affected (m)
Project started 2012/07/01
Works started
Works completed
Project completed 2015/03/31
Total cost category 500 - 1000 k€
Total cost (k€) 800800 k€ <br />800,000 € <br />
Benefit to cost ratio
Funding sources Catchment Restoration Funds

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

Mitigation of a pressure Barriers to fish migration, Pollution incident
Hydromorphology Continuity for organisms, Structure & condition of riparian zones
Biology Fish
Physico-chemical Nutrient concentrations
Other reasons for the project Economic, Social, Climate change mitigation


Measures

Structural measures
Bank/bed modifications Marginal planting, Gravel augmentation
Floodplain / River corridor Track creation for sediment traps
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents




Additional documents and videos


Additional links and references

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Supplementary Information

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