Case study:The South Cornwall River Improvement Project
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Location: 50° 9' 36.67" N, 5° 20' 46.40" W
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Project overview
Project summary
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The SCRIP project is a partnership that will use CRF funds to manage restoration work to deliver habitat improvements on the rivers that drain South Cornwall and the St Austell bay area. The partnership, led by the Westcountry Rivers Trust, has been carrying out river restoration and addressing the causes of Water Framework Directive issues together for many years.
Through restoration work, the project will address issues including:
- flow modifications and habitat degradation;
- diffuse pollution from agriculture;
- barriers to fish migration;
- interrupted conveyance of river gravels reducing spawning habitats for salmonids;
- impacts from china clay extraction and historic mining
Description of Works
To tackle issues in the South Cornwall and St Austel Bay area, the SCRIP project will manage delivery of the following activities:
- Weir & Culvert Easements – Direct physical action to improve the connectivity of the river for multiple migrating species (fish and/or eels), therefore removing the factor that is causing the waterbody to fail for fish;
- Habitat creation – Creation of in-stream flow deflectors to create riffle/pool sequences in the long channelised section of river which lack habitat heterogeneity
- Gravel introduction - Restoration of fish spawning habi- tat by means of gravel intro-duction will increase spawning rates, and sur-vival of the early stages of salmonid and other fishes life cycle
- Fencing – Where agricultural input is a causative issue of failure under WFD (phosphate), target-ed riparian fencing along with associated drinking points will be constructed by working with key farmers and landowners within the catchment. There are multiple benefits which include reduced poaching of banks caused by livestock, it also allows a patchwork mosaic of different riparian habitat growth (when done well). Fencing also acts as a partial capture system to in- cept land and road run off and increases in stream ecological diversity.
- Culvert mitigation - Culverts to be adjusted to improve river continuity including bed load and mi-gratory fish.
- Nutrient management – Soil tests will be available for farmers in key catchments to help reduce diffuse pollution and phosphate loss and improve nutrient management on farm.
- Interpretation/Geocache - Boards-Interpretation areas will be installed to disseminate information and engage and educate local users
What will success look like?
Success in the rivers of South Cornwall will include the direct delivery of the above WFD targeted actions but will also include the development of a strong partnership that brings together local communities and encourages them to take pride and ownership of the issues affecting the catchment they live in. By promoting this awareness and ensuring that the local community understands their de-pendence on these natural resources, we aim to ensure the project is not only successful in the short term, but will be sustainable and continued into the future.
Monitoring surveys and results
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Lessons learnt
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Image gallery
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Catchment and subcatchment
Site
Project background
Cost for project phases
Supplementary funding information£410,444 from CRF, £27,000 from match funding
Reasons for river restoration
Measures
MonitoringHydromorphological quality elements
Biological quality elements
Physico-chemical quality elements
Any other monitoring, e.g. social, economic
Monitoring documents
Additional documents and videos
Additional links and references
Supplementary InformationEdit Supplementary Information
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