Flood probability reduction measures


On a local scale (property, allotment), this may also include ‘sustainable drainage systems’ (SUDS), which are already regulated by law for the drainage of new urban development in most German states. The following mitigation measures of FPRM can be regarded as emergent:

  • controlled surface conveyance of flood water exceeding the drainage pipe network and its temporary storage in public spaces (e.g. green areas) designed as multi-functional spaces – also known as exceedence flow management [*1];
  • the reopening of culverts and the restoration of natural elements (flood plains, meandering river beds and woody vegetation) for they can enhance the retention of flood water, although they may also simply transfer flooding problems from the culvert inlet to upstream or downstream; and
  • small retention reservoirs, retaining the flood water in a semi-distributed way, by receiving flood water from a central stormwater pipe or a small watercourse in SUCA’s.


Along the watercourse the flood probability can be reduced by so called fluvial flood detention measures. These measures include:

  • dayligthing of the watercourse (reopening of culverted watercourses)
  • flood plain restauration
  • creation of flood polders

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Flood probability reduction measures



*1 CIRIA (2006)



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