Page 9 - Updated SuDS Design & Evaluation Guide-Newham V3 Spreads

Overview 1.3 Background to this document 2.0 Understanding Rainfall Overview

A number of SuDS guides have been
produced in the UK since 2000, many of
which outline the benefits of SuDS, but fail to
provide sufficient insight into how design
should be approached with SuDS in mind, It is important that everyone involved in the design and evaluation of SuDS has
and with little guidance on the evaluation an understanding of the natural processes that occur in response to rain, so that
process for developments. This guide proposed schemes can mimic these.

considers design and evaluation of SuDS as
complementary. It explains both, from the
earliest iteration of Concept Design through 2.1 It begins to rain In forests, glades, and wetlands, when it
to the Detailing stage, in order to successfully rains, water can be lost in a number of
ways. The rain is held on the foliage of
integrate SuDS into development.
trees and plants and evaporates into
The main objectives of this Design and the air, falls to the ground to be
Evaluation guide are: absorbed by leaf litter and surface

■ To create a shared vision around SuDS for soil layers, or is ‘breathed’ back
into the air by plants as
all involved in design and evaluation.
transpiration. These losses
■ To enable the design and evaluation of are called interception
SuDS to meet agreed standards. losses and are the first

3 ■ To ensure SuDS are maintainable now and part of the natural 4
losses that occur
in the future.
during rainfall.

This guide is complementary to:

■ The National Planning Policy Framework (NPPF)

■ Relevant Local Planning Policy

■ Construction Industry Research and Information Association (CIRIA) 2015 SuDS Manual

(C753)

■ SuDS Non-Statutory Technical Standards (NSTS)

■ Association of SuDS Authorities (ASA) NSTS Practice Guidance

This guide draws upon the experience of the authoring team, which has been gained over 20
years of practical SuDS application. Interception losses in
the natural landscape.

London Borough of Newham SuDS D & E Guide © 2020 McCloy Consulting & Robert Bray Associates London Borough of Newham SuDS D & E Guide © 2020 McCloy Consulting & Robert Bray Associates