Page 26 - Hackney SuDS DESIGN & EVALUATION
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6.0 Local SuDS requirements for
Local SuDS requirements
Hackney
Landscape character geological terms, the London Clay has been
overlain by drift deposits from river terraces.
The LB of Hackney (LBH) is located in north As the River Lee has altered path and
London bordering the London boroughs of scoured channels deeper through time, they
Haringey, Islington, Tower Hamlets, City of have left deposits of sand and gravel in
London and Newham and Waltham Forest.
terrace formations upon the underlying
The borough boundary encompasses an area geology.
of 1,900ha and is mainly urban, with open Local SuDS specific requirements
green spaces dotted around the borough.
Large open spaces, including Hackney Drainage proposals must comply with the
Marshes, are generally located along the latest Hackney Local Plan and Core Strategy.
eastern boundary of the borough towards the LBH requires drainage solutions to
River Lee. incorporate SuDS principles as laid out in the
Non-Statutory Technical Standards for
LBH slopes in a general easterly direction Sustainable Drainage Systems and the
towards the River Lee. The highest parts of
the Borough are in the north-west, along the London Plan.
21 boundaries with the London Boroughs of All development should utilise SuDS and
Islington and Haringey. manage surface water run-off as close to
source as possible. For redevelopment sites
There is evidence of previous flooding along where there is a net increase in impermeable
prevailing overland flowrouthes which pass
along Amhurst Road and Wick Road. Along area, development must include at least one
‘source control’ SuDS measure. Examples of
the eastern boundary of the borough in the
floodplain of the River Lee, ground levels are potential Source Control measures include
blue/green roof, rainwater harvesting,
low-lying and relatively flat.
bioretention, raingarden and permeable
Local Geology paving. These are expected to result in a net
improvement in water quantity and quality
The LBH lies within the London Basin, which being discharged offsite. Underground
has been shaped by a relatively thick (few storage/attenuation tanks are not
hundred metres) chalk syncline. The basin encouraged and should be used as a last
has been infilled over time by a series of clays resort, as they are more difficult to maintain
and sands, the most notable deposit being and replace in the long term.
the fossil rich and impermeable London Clay.
The clay layer can be up to a maximum of Amenity and biodiversity benefits should be
150m thick beneath London. More recently in maximised on all schemes by incorporating
London Borough of Hackney SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates
