Case study:The Dart and Teign River Improvement Project (DTRIP)

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Location: 50° 23' 37.09" N, 3° 37' 26.81" W
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Project overview

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Status Complete
Project web site
Themes Economic aspects, Fisheries, Habitat and biodiversity, Social benefits, Water quality
Country England
Main contact forename Bruce
Main contact surname Stockley
Main contact user ID
Contact organisation Westcountry Rivers Trust
Contact organisation web site http://www.wrt.org.uk/
Partner organisations Environment Agency, Natural England, Dartmoor National Park, the Dart Fisheries Association, the Teign Fisheries Association, the Duchy of Cornwall, the Dartmoor Hill Farm Project, Fountains Forestry, The Woodland Trust, South West water, The Forestry Commission, University of Plymouth, University College London.
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Project summary

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DTRIP is a partnership project that will use CRF funds to manage restoration work and to deliver habitat improvements in the Dart and Teign catchment. The partnership, led by the Westcountry Rivers Trust, has been working together for many years, carrying out river restoration and addressing the causes of Wa-ter Framework Directive issues.Through restoration work, the project will address issues including: sediment, which has a direct adverse effect on water quality; diffuse pollution from agriculture and roads, which can impact on river ecology and causes WFD failures; barriers to fish migration, preventing fish from reaching habitat where modeling shows they should be present; interrupted conveyance of river gravels, resulting in reduced spawning habitats for salmonids; habitat loss of wetted and wooded land that has an important role to play in improving water quality & quantity; acidified moorland that creates low pH levels that are detrimental to ecological health of the rivers.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

Catchment

River basin district South West
River basin River Dart

Subcatchment

River name DART
Area category
Area (km2)
Maximum altitude category
Maximum altitude (m)
Dominant geology
Ecoregion Great Britain
Dominant land cover
Waterbody ID GB510804605900



Other case studies in this subcatchment: The South Hams River Improvement Project (SHRImP)


Site

Name
WFD water body codes GB510804605900
WFD (national) typology
WFD water body name DART
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 2012/05/01
Works started
Works completed
Project completed 2015/03/31
Total cost category 500 - 1000 k€
Total cost (k€) 665665 k€ <br />665,000 € <br />
Benefit to cost ratio
Funding sources Defra Catchment Restoration Fund

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, Drinking water storage and supply
Hydromorphology Continuity for organisms, Gravel Augmentation, Continuity of sediment transport
Biology Fish
Physico-chemical Nutrient concentrations, PH
Other reasons for the project Economic, Social


Measures

Structural measures
Bank/bed modifications Marginal planting, Removal of weirs/barriers, Reduce diffuse pollution, Diversification of in-channel features
Floodplain / River corridor Fencing, fenced drinking points
Planform / Channel pattern Channel features creation
Other
Non-structural measures
Management interventions Agricultural business changed its way of working
Social measures (incl. engagement) Community involvement
Other Monitoring and survey projects


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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