Pilot 1856 03/01/1850 Creation of the Roize association to maintain and protect the city dept. New protection measures: bed sills at the fan apex, large deposition basin surounded by Archives dikes in the fan distal part, downstream of the dikes (extension: ~ 20,000m²) BD-RTM 31/7/1851 Severe flood with huge sediment transport, extensive bank erosions BD-RTM Creation of the first torrent control check dams built in France: 3 dams 600, 1300, 1800 m upstream of the fan apex. Built to promote sediment deposition and prevent incision Gras 1857
Pilot 1856 03/01/1850 Creation of the Roize association to maintain and protect the city New protection measures: bed sills at the fan apex, large deposition basin surounded by dikes in the fan distal part, downstream of the dikes (extension: ~ 20,000m²) dept. Archives BD-RTM 31/7/1851 Severe flood with huge sediment transport, extensive bank erosions Creation of the first torrent control check dams built in France: 3 dams 600, 1300, 1800 m upstream of the fan apex. Built to promote sediment deposition and prevent incision BD-RTM Gras 1857
RoizeFloodRisk2016_ind1.docx