Practical guide for debris flow and hillslope debris flow protection nets and its application in case studies

Debris flows and hillslope debris endanger people infrastructures. Technical protection measures are important elements in addition to spatial planning (adapted use of space like hazard maps) organizational (warning systems, emergency plan, evacuation). Additional other rigid flexible flow nets were developed 2008, 2010 respectively. Such barriers consist an interception surface netting spanned between horizontal support ropes including energy devices posts for large span width. Since then, they available on the market worldwide. Many projects successfully installed already filled by events. After more than ten years experience demonstrating that these work against flow, fully accepted as possible integral flow. To provide planners engineers know-how nets, a practical guide was initiated Swiss Federal Roads Office (FEDRO) Environment (FOEN). Two case studies with planned one presented.