Case Study
River Restoration on the River Nar, Norfolk
Location
River Nar, Norfolk
Date
October – December 2016
Client
Norfolk Internal Drainage Board
Stakeholders
Breckland District Council, Kings Lynn & West Norfolk Borough Council
Tasks
- Excavate flood-plain borrow-pits to win gravel material on site
- Reconnect a relict meander
- Create pools
- Scallop banks
- Localised bed raising
- Create berms
- Install large wood features
- Bank profiling and protection
- Reinstate footpath
- Lower embankments
- Site monitoring
Key remarks
- We undertook work for the Norfolk Internal Drainage Board to restore four reaches of the River Nar in and around Castle Acre
- The restoration project sought to reinstate natural form and flow function by utilising site won materials such as gravels and timber
- Site-won gravel was used to raise the bed-level of over-deepened parts of the river bed and restore a relic meander
- Restoration works were undertaken in order to restore flow velocity, enhance channel dynamics, and thus in- stream plant communities, invertebrate numbers and fish habitat
Effects
- Reinstatement of natural form and flow function
- Enhanced stream dynamics
- Enhanced in-stream plant communities, invertebrate numbers and fish habitat
