Case study:River Colne Riparian Tree Planting
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- 1 Project overview
- 2 Image gallery
- 3 Catchment and subcatchment
- 4 Site
- 5 Project background
- 6 Reasons for river restoration
- 7 Measures
- 8 Monitoring
- 9 Additional documents and videos
- 10 Additional links and references
- 11 Supplementary Information
|Project web site|
|Main contact forename||Matt|
|Main contact surname||Butcher|
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|Contact organisation web site|
|Parent multi-site project|
| This is a parent project
encompassing the following
The River Colne is not meeting its WFD objectives for aquatic plants, and the fish status has recently deteriorated from high to good. Riparian shade mapping from the Keeping Rivers Cool project and walk over surveys showed that the rive would benefit from increased shade at a number of locations. Working with landowners, Essex & Suffolk River Trust identified a number of sites where tree planting could be undertaken, and planted trees at one suitable site.
Monitoring surveys and results
Riparian trees provide shade, which not only keeps the water cooler, but also helps control excessive weed and algal growth. Cooler water not only contains more oxygen, but many fish and invertebrates are sensitive to increasing temperature. This is likely to be exacerbated as temperatures increase due to climate change. In the future the tree roots and woody debris from fallen branches and tree trunks will provide important in-channel habitat and flow diversity, providing refuge for fish and invertebrates from both predators and high flows. Trees also help stabilise the banks, reducing erosion as well as improving infiltration and intercepting pollution and sediment. Reduced sediment transfer prevents the smothering of important gravel habitat, and can reduce pesticide and nutrient run off. Tree planting therefore not only provides important habitat but improves water quality and can reduce the need for expensive river maintenance.
Close liaison with permitting and enforcement colleagues is essential to establish suitable restoration sites, and ensure that flood risk is not increased.
Catchment and subcatchment
Cost for project phases
Reasons for river restoration
Hydromorphological quality elements
Biological quality elements
Physico-chemical quality elements
Additional documents and videos