Hillingdon SuDS Design & Evaluation Guide
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Modifi<br />
Step 2 – Modified Flow Route analysis<br />
The modified flow route analysis is the basis<br />
for low flow conveyance through the site,<br />
overflow arrangements and exceedance<br />
routes when design criteria are exceeded.<br />
key<br />
Proposed hard surfaces<br />
Proposed soft surfaces<br />
Once the modified flow routes have<br />
demonstrated that Proposed runoff trees can flow<br />
predictably through the site, the arrangement<br />
Proposed contours<br />
of runoff collection, source control, site<br />
control, regional Surface control, flow conveyance, storage<br />
and final release from site can be designed.<br />
Roof runoff<br />
Modified Modified flow routes Flow Route<br />
Concept <strong>Design</strong><br />
Holyo<br />
Modifie<br />
key<br />
Propo<br />
Propo<br />
Propo<br />
Propo<br />
Surfac<br />
30<br />
Roof ru<br />
Proposed<br />
discharge to<br />
existing ditch<br />
Modified Flow Route Analysis for Holyoakes School, Robert Bray Associates.<br />
London Borough of <strong>Hillingdon</strong> <strong>SuDS</strong> D & E <strong>Guide</strong><br />
© 2018 McCloy Consulting & Robert Bray Associates
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