Page 65 - Updated SuDS Design & Evaluation Guide-Newham V3 Spreads

Outline Design 8.3.1 Information to support Outline Design 8.4 Design criteria considerations ■ storage locations and approximate Outline Design

Limited information may be available at
Quantity
Concept Design Stage and must be
The designer should confirm
augmented to provide a full understanding of
the site at Outline Design.
■
whether infiltration is appropriate for the
The following information should be collated
site or whether rainfall will be managed as
volumes to appropriate flow rates
to evaluate site constraints and inform SuDS
design:
■ runoff ■ overflow arrangements from each storage
whether Approach 1 or Approach 2 is
location
■ Existing services, including location and ■ Consents affecting off-site and on-site being used to manage volumes
depth. These can influence layout, depth elements of the SuDS. ■ exceedance routing when design volumes
and placement of SuDS features. ■ contributing area of impermeable hard are exceeded or flows are generated from
■ Confirmation of the method of discharge: surface outside the site
■ Planning conditions, for example SuDS in infiltration or runoff to a watercourse or
‘conservation areas’, which may influence sewer and impact of runoff volumes on ■ sub-catchment design ■ allowances for climate change and urban
creep.
choice of SuDS components and the use the site. ■ flow control locations
of materials.
Confirmation of ownership and maintenance
■ Ownership and future management of arrangements would be subject to a planning

SuDS will influence component selection, condition. Quality
typically adoption by Local Authorities
The designer should demonstrate
and especially Highways Departments.
59 ■ there are sufficient SuDS surfaces to meet ■ how spillage could be managed 60
interception losses requirements
A biodiversity raingarden at Renfrew Close, ■ how runoff could be managed during
Newham with cornfield annuals alongside ■ sufficient treatment is available to manage construction.
meadow flora for the future.
pollution risk along the management train

Amenity

The designer should demonstrate

■ the SuDS is understandable to people ■ the visual character of the SuDS will

using the site and maintenance personnel enhance the development
– legibility
■ spaces and connecting routes are multi-
■ the site is generally accessible to people functional and can be used when not
and safe ‘by design’ providing a SuDS function for rainfall
management.

Newham Council SuDS D & E Guide © 2020 McCloy Consulting & Robert Bray Associates Newham Council SuDS D & E Guide © 2020 McCloy Consulting & Robert Bray Associates