Case study:Nobles Green Ditch River Restoration
To discuss or comment on this case study, please use the discussion page.
- 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|
|Themes||Habitat and biodiversity, Hydromorphology, Water quality|
|Main contact forename||Matt|
|Main contact surname||Butcher|
|Main contact user ID|
|Contact organisation web site|
|Parent multi-site project|
| This is a parent project
encompassing the following
Installing woody debris flow deflectors to improve habitat and morphology of Nobles Green Ditch. Nobles Green Ditch has historically ben heavily modified to improve flood protection and land drainage. It is failing to meet its WFD objectives for invertebrates. The mitigation measures assessment for the river revealed that measures were needed to improve in-channel morphological diversity. This project aims to address these issues.
Monitoring surveys and results
Research undertaken by the wildlife trusts concluded that 147 species of river invertebrates are closely associated with woody debris. These features directly provide habitat for such species. Furthermore, woody debris flow deflectors improve river morphology, creating differential areas of fast and slow flowing water. Energetic, faster flowing water improves sediment transfer, helping to keep gravels clean. It is also important for the formation of features such as riffles and pools as well as meanders. Slower flowing water provides a refuge for fish and invertebrates from high flows, and allows silt to settle out, eventually forming berms which will improve diversity of flow and plant communities.
Involving communities in river restoration projects not only improves understanding and ensures long term support for projects but volunteers can help keep project costs down, enabling us to achieve more limited budgets.
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