Case study:Crane Meadows Meander Connections

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Location: 51° 28' 27", -0° 24' 51"
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Project overview

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Status Complete
Project web site http://www.cranevalley.org.uk/projects/crane-aquatic-refuge.html
Themes Environmental flows and water resources, Fisheries, Flood risk management, Habitat and biodiversity, Hydromorphology, Social benefits, Urban
Country England
Main contact forename Tom
Main contact surname White
Main contact user ID
Contact organisation London Wildlife Trust
Contact organisation web site http://www.wildlondon.org.uk
Partner organisations
Parent multi-site project

The Crane Aquatic Refuge Project

This is a parent project
encompassing the following
projects
No
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Project summary

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London Wildlife Trust have undertaken meander reconnection works at Crane Meadows Nature Reserve in Cranford, Hounslow.

The meanders were cut off from the river over 100 years ago when the river was subject to heavy modifications. The London Borough of Hounslow and the Environment Agency had previously reconnected three meanders at the site. LWT's input now brings this total to five.

In addition to the meander connections a backwater area was created to improve the river's resilience to pollution events and to enhance habitat for juvenile coarse fish.

Aims of this Project

1. To increase morphological and flow diversity in the river channel leading to better quality habitat for macrophytes and benthic invertebrates and improved habitats for fish.

2. To decrease flow conveyance and increase water storage capacity, contributing to the rivers hydrological response time being reduced during periods of high flows.

3. To provide new back water areas for aquatic organisms to shelter from the main flow of the river during times of disturbance, including pollution events.

4. To increase public awareness and appreciation of the issues affecting the Crane Catchment and the techniques used to solve them via a volunteer engagement programme.

A gravel riffle will be placed just downstream of the meander inflow to ensure all water flows through the meander when river levels are low.

The bund blocking the inflow of water to the meander will be removed.

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Catchment and subcatchment



Site

Name Crane Meadows, Cranford
WFD water body codes
WFD (national) typology
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Desired post project morphology
Heavily modified water body No
National/international site designation
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Protected species present No
Invasive species present No
Species of interest
Dominant hydrology
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River corridor land use
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Project background

Reach length directly affected (m)
Project started
Works started 2014/09/01
Works completed 2015/09/30
Project completed
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Cost for project phases

Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname
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Monitoring



Reasons for river restoration

Mitigation of a pressure Recent pollution events
Hydromorphology Flow diversity, increase water storage capacity, reduce flood risk
Biology Improve habitat quality
Physico-chemical
Other reasons for the project Improve public awareness


Measures

Structural measures
Bank/bed modifications Riffle creation
Floodplain / River corridor
Planform / Channel pattern Removal of channel blockages
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other


Monitoring

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Monitoring documents



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Supplementary Information

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