34. Leagrave Marsh improvements

Themes: Community engagement and participation; Promoting appropriate and sympathetic land management; Improving water quality and water quantity

Objectives:

  • Improve local knowledge and understanding of the river and the issues facing it
  • Increase public access to and involvement in the river
  • Promote the river as a community and educational resource
  • Reduce flood risk
  • Improve existing wildlife corridors
  • Increase the amount and quality of habitat
  • Reduce pollution through physical improvements around the river
  • Educate the general public and local businesses about its role in water quality and quantity improvements

Project description

Groundwork East has appointed a consultant to undertake a topographic survey - the results will be available soon.

 Groundwork has also appointed a consultant to review the options associated with weir removal/modification, and the implications on the ecology and hydrology of Leagrave Marsh.

 The next design team meeting is in January 2019 and a consultation programme is being considered for commencement in Spring 2019.

Weir removal / notching / baffles

The weir modification at the site would be to improve the morphology of the river going through the park. Currently, the river is suffering from being impounded.

The weir can be seen in the images below:

LeagraveImprovementsMAIN1 LeagraveImprovementsMAIN2

There are three main options for mitigation of the Brammingham Road Weir, these include:

• Weir removal – removing the vast majority of the weir structure,

• Weir notching – removing a central section of the weir to lower the impoundment, potentially allowing some species of fish to pass

• Baffle installation – installing baffles up the weir, to allow fish and some invertebrate movement from downstream to upstream.

The risks of weir modification will need to be assessed and managed through the feasibility and design. These risks will also need to include:

• Will any option have a structural impact on adjacent road / footpath

• Will any option cause any flood risk downstream

• Will any option cause any detriment to the upstream wetlands (proposed and current)

• Will any option create issues with river narrowing upstream

• Will weir notching bring about enough benefit to morphology

• Will weir notching bring about enough benefit to fish / invertebrate populations

• Will baffle installation bring about enough benefit to fish / invertebrate populations

Project lead: Groundwork East
Contact for more information: This email address is being protected from spambots. You need JavaScript enabled to view it.

Design by LTD Design Consultants and build by Garganey Consulting.