Page 15 - Lewisham SuDS DESIGN & EVALUATION
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3.2 Separating rainwater from foul sewage
In the mid-twentieth century it was realised Unfortunately, rainwater still gets into the
that foul sewage and storm water should be foul sewer and misconnections Overview
separated. A separate sewer arrangement contaminate surface water sewers and
was introduced with the foul sewer for receiving watercourses. The SuDS
human waste and the surface water sewer approach to managing rainfall can
for rainfall. However, in many urban areas minimise these misconnections by
these connections are still unclear and are keeping runoff at or near the surface.
complicated by highway drainage and other
ad hoc arrangements.
10
Separate pipes for foul
sewage and surface water
were introduced in the
mid-twentieth century.
Lewisham Council SuDS D & E Guide © 2018 McCloy Consulting & Robert Bray Associates
