Case study:Sutcliffe Park

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Location: 51° 27' 17.73" N, 0° 1' 48.29" E

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity
Country	England
Main contact forename	Toni
Main contact surname	Scarr
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.uk
Partner organisations
Parent multi-site project	Case_study:Quaggy Flood Alleviation Scheme
This is a parent project encompassing the following projects	No

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Catchment and subcatchment

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Site

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Name	Sutcliffe Park
WFD water body codes	GB106039023290
WFD (national) typology	Calcareous
WFD water body name	Quaggy
Pre-project morphology	Closed culvert
Reference morphology
Desired post project morphology
Heavily modified water body	Yes
National/international site designation
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Protected species present	No
Invasive species present	No
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River corridor land use	Urban
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Project background

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Reasons for river restoration

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Mitigation of a pressure
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Measures

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Monitoring

Hydromorphological quality elements

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quality elements

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Any other monitoring, e.g. social, economic

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stakeholder liaison	Yes	Yes	No	No	No

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Sutcliffe Park Flood defence aspects

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stage 1

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Link	Description

Supplementary Information

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construction The works were designed to alleviate flooding in the Lewisham area. The flood detention area was constructed on the Quaggy River. The location of the detention area is approximately 3km east of Lewisham, in the London Borough of Greenwich, in Sutcliffe Park, formerly eight football pitches. The construction includes a 2.5m high x 480m long earth embankment, which surrounds Sutcliffe Park. The embankment is 2.5m high at its highest point to the west side of the site and at existing ground level to the east. The embankment retains floodwaters within the reservoir basin that has been excavated. The culvert carrying the river follows two sides of the park and is to remain. The low flow inlet control structure was formed through cutting slots into the side of the culvert and a reinforced concrete channel to direct the flow into the park. A few metres downstream of the low flow inlet is a 0.5m high weir to direct the majority of the flow through the park.

The high flow inlet also has slots cut into the side of the culvert and a concrete slab in front to prevent erosion. Just downstream of the high flow inlet a flume has been constructed within the culvert to constrict the flow. The spillway also has slots in the side of the culvert and the landform is at a lower level to allow the water back into the culvert at this location. The outlet structure is constructed from reinforced concrete and has a plastic pipe connecting the flow from the park back into the culvert. The low flow inlet and outlet structures have penstocks within them to control the water movements.