Tool risk reduction measures


Drainage installations for diverting surface water away from buildings and increasing retention an infiltration

Predefined flow routes aiming on diverting surface water away from building can be built on the property or along its boundaries, e.g. by a change in gradient, ground sills, creation of depressions or by building of water diverting structural elements like walls. Areas on the property such as basins or trenches may be constructed for collecting the water and providing a controlled infiltration into the soil. Definition of requirements by municipality is possible.

Fields of action
Settlement areas, Buildings
Synergies may exist between heavy rain risk management measures and other development goals like environmental protection, health care, and economic performance. Harnessing them requires involvement of different actors, enforcement of exchange between you and them and holistic thinking.

Check out the RAINMAN good practice examples:

no good practice example available


  • Amt der Oberösterreichischen Landesregierung (2015): Hangwassermanagement Maßnahmenkatalog [management of pluvial floods catalogue of measures] (unpublished brochure, online version accessible at URL: Abflussgraben, Abflussmulde, Rohrleitungen
  • Hamburg Wasser (Ed.) (2012): Wie schütze ich mein Haus vor Starkregenfolgen?: ein Leitfaden für Hauseigentümer, Bauherren und Planer [How do I protect my house from the effects of heavy rain?: a guide for homeowners, builders and planners], URL: (20.03.2020): Dränung

Sabine Scharfe, Saxon State Office for Environment, Agriculture and Geology