Flash floods and muddy floods in Wallonia: recent temporal trends, spatial distribution and reconstruction of the hydrosedimentological fluxes using flood marks and sediment deposits ; Crues éclairs et coulées boueuses en Wallonie : analyse de leur distribution spatiale et de leur évolution temporelle récente et reconstruction des flux hydrosédimentologiques sur base des laisses de crue et des dépôts sédimentaires

peer reviewed ; Flash floods and muddy floods may cause severe human and material damage despite their small spatial extent and low occurrence. In late May 2008, a major event has affected the area of Liège. This paper describes the methodology used to reconstruct the hydrosedimentological parameters of the flood from the geomorphological evidences observed in the field. Bed load and suspended load transport rates estimated during this extreme event were compared to the average values observed in other Walloon rivers and more specifically in the Ardennes Massif. The spatial distribution and th... Mehr ...