Case study:Rewilding the Rom

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Location: 51° 33' 28.30" N, 0° 11' 2.29" E

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Project overview

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Status	In progress
Project web site	http://www.thames21.org.uk/improving-rivers/rewilding-the-rom/
Themes	Flood risk management, Habitat and biodiversity, Monitoring, Social benefits, Water quality, Urban
Country	England
Main contact forename	Carolina
Main contact surname	Pinto
Main contact user ID	User:TylerThames21
Contact organisation	Thames 21
Contact organisation web site	http://www.thames21.org.uk
Partner organisations	London Borough of Barking and Dagenham, Environment Agency, Essex and Suffolk Water (Northumbrian Water), Kusuma Trust, Land of the Fanns, Thames Chase, Mayor of London
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The River Rom is a tributary of the River Thames and forms the boundary between the east London Boroughs of Barking and Dagenham and Havering.

Like many of London’s rivers, the Rom has suffered in recent years. Water quality has been impacted by sewage misconnections and overflows, whilst habitats for wildlife have been damaged by dredging and straightening of the river channel.

The downstream reach of the River Rom (also known as the River Beam) flows through the eastern section of The Chase Local Nature Reserve (LNR). The Chase LNR incorporates nearly 50 hectares of meadows, ponds, marshes and woodlands and has been designated as a Site of Metropolitan Importance for Nature Conservation.

In 2021, funding from the Land of the Fanns Partnership Scheme allowed two seasonal wetlands (known as scrapes) to be dug on the Havering Side of the River Rom. These scrapes trap water on the floodplain during times of heavy rain and act as important habitats for wetland plants, birds, and other animals.

In 2022, thanks to funding from the Kusuma Trust, the Mayor of London’s Rewild London Fund, and Essex and Suffolk Water, Thames21 will be working in partnership with The London Borough of Barking and Dagenham to further reconnect the River Rom with its floodplain, this time on the opposite bank. To do this, we breached a large flood embankment in three places and dug out three interconnected wetlands. In high flows, the river floods into this newly connected area of floodplain, creating an area of seasonal wetlands, rich in wildlife including frogs, newts, dragonflies and water birds.

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name River Rom WFD water body codes GB106037028120 WFD (national) typology WFD water body name Rom (Bourne Brook to Ravensbourne) Water Body Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body Yes National/international site designation UK - Local Nature Reserve Local/regional site designations Local Nature Reserve Protected species present Yes Invasive species present Yes Species of interest Himalayan Balsam, Japanese Knotweed, water vole (Arvicola terrestris) Dominant hydrology Quick run-off, Groundwater Dominant substrate Clay, Silt River corridor land use Urban, Irrigated land, Improved/semi-improved grassland/pasture Average bankfull channel width category 2 - 5 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 300300 m <br />0.3 km <br />30,000 cm <br /> Project started 01/01/2021 Works started Works completed Project completed Total cost category 100 - 500 k€ Total cost (k€) Benefit to cost ratio Funding sources Essex & Suffolk Water, Greater London Authority, Kusuma Trust Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 1 - 10 k€ Thames21 Stakeholder engagement and communication 10 - 50 k€ Thames21 Works and works supervision 10 - 50 k€ Thames21 Post-project management and maintenance 10 - 50 k€ Thames21 Monitoring 1 - 10 k€ Thames21 Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information