Page 98 - Newham SuDS DESIGN & EVALUATION GUIDE

Detailed Design 9.6 Controlling flows 9.6.1 Design flexibility Detailed Design

A framework of three approaches which
Where a single storage volume is presented,
deliver variable outflow rates (Approach 1)
it is the intuitive response of most designers
are explored by this guide. These approaches
to try and accommodate all flow at a single
are intended to inspire the designer to think
storage location. However, the opportunities
about the possibilities that exist for
for storage across the site are diverse and
integrating storage as part of the
flexible.
Appearance, functionality and character of a
underground storage structure prior to
space can be influenced by how flows are development rather than defaulting to an
discharge from the site. They can be
stored and controlled within each SuDS summarised as follows:
component.
Plastic spacers are used to form open joints
between standard slabs at Abbey Park Campus Distributed storage components
Leicester College, where all hard landscape
areas, including the pedestrian entrance plaza ■ distributed storage volumes into discreet
to the building, are used for storage.
storage components such as raingardens,
Raingarden and rill exploiting small pockets of swales, basins and permeable pavement
green space for creative water management at with the potential for different rainfall
Bewdley School Science Block.
These features visibly fill whenever it rains. depths being stored at each location.

93 Single, uniform storage components 94

■ store up to the 1 in 100 year rainfall in a
single storage component, such as a
permeable pavement or blue-green roof,
with openings sized to achieve the
variable outflow rates.

Single, tiered storage components

■ store up to the 1 in 100 year rainfall in a
single, tiered storage component, such as
a smaller basin used on a regular basis
within a more extensive basin for more
extreme rainfall events and openings sized
to achieve the variable outflow rates.

London Borough of Newham SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates London Borough of Newham SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates