Tool risk reduction measures


Regulation of torrent streams and gullies

  • Description
  • Fields of action
  • Synergies
  • Good practice examples
  • References

This measure is usually carried out in form of sets of barrages built in a direction perpendicular to a stream’s direction. The aim of the measure is to modify the erosion and accumulation processes in torrent streams through the retention of water and eroded material, e.g. when settlement areas are at risk. It effect is enhanced when applied together with other measures in the watershed. The material used for the barriers depends on the natural conditions of the area of interest and on hydro-technical calculations. Permission by water management authority and nature conservation authority may be required.

Fields of action Settlement areas,Watercourses
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


  • Výzkumný ústav vodohospodářský TGM (2018): Katalog přírodě blízkých opatření pro zadržení vody v krajině [Catalogue of green water retention measures in the landscape], URL: (25.03.2020): Příkop, Hrazení bystřin, Hrazení strží

Výzkumný ústav vodohospodářský T. G. Masaryka. v.v.i.