Designing for exceedance in urban drainage - good practice (C635)

This guidance provides good practice advice to drainage engineers, regulators, planners and the construction industry on the design and management of urban sewerage and drainage systems to reduce the impacts from drainage exceedance.

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Please note: In 2013 CIRIA also undertook some work to help support the uptake of drainage exceedance. An update on science, evidence, practice together with case studies can be found here
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  • is a community that provides a range of resources for those involved in delivering sustainable drainage systems (SuDS)
  • CIRIA has developed three engaging and informative training courses to help support the delivery of SuDS