Page 26 - Haringey SuDS DESIGN & EVALUATION
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6.0 Local SuDS requirements for
Local SuDS requirements
Haringey
Landscape Character Local Geology
The London Borough of Haringey (LBH) is an Haringey lies within the London Basin, a large
inner London borough located to the north of geological ‘dish’ that dominates the geology
the city. The most notable watercourses of the Home Counties, which has been
running through the borough are the River shaped by a relatively thick (several hundred-
Lee (or Lea) and Moselle Brook. The Moselle metre-deep) chalk syncline bounded to the
Brook flows through the north of the south by the chalk of North Downs, and to
borough in Tottenham and was originally a the north by the chalk outcrop of the Chiltern
tributary of the River Lee. The majority of the Hills.
watercourse is now culverted and flows into
Pymmes Brook. The River Lee flows in a The basin has been infilled over time by a
series of clays and sands, the most notable
southerly direction along the eastern
boundary of the borough with Waltham deposit being the fossil-rich and
impermeable London Clay. The clay layer can
Forest.
be up to 150 m thick beneath London. More
The borough’s topography generally slopes in recently in geological terms, London Clay has
an easterly direction towards the River Lee. been overlain by drift deposits from river
21 The highest parts of the borough are in the terraces. As the River Lee has altered its path
west, along the boundaries with the London and scoured channels over time, it has left
Boroughs of Barnet, Camden and Islington. deposits of sand and gravel in terrace
The lowest areas are along the boundary with formations upon the underlying geology.
Waltham Forest in the River Lee valley.
There are eight different geological types
Due to its urban character, surface water that cover the borough to varying extents:
runoff from rainfall is flashy in nature. Local London Clay, Enfield Silt Member, Alluvium,
topography indicates that surface water Kempton Park Gravel Formation, Taplow
runoff is likely to flow in an easterly direction Gravel Formation, Boyn Hill Gravel Member
and pond in low-lying areas. There are a (BHT), Dollis Hill Gravel Member, Lowestoft
number of railway embankments within the Formation, Claygate Member and Bagshot
borough that can impede or alter flow routes. Formation.
London Clay is a prevalent type across the
borough (The four principal soil
classifications can be found across the
borough:
London Borough of Haringey SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates
