Author(s)

S. Le Clerc, E. Sauquet & M. Lang

Abstract

Scaling properties of flood hydrographs and their use to derive design flood hydrographs S. Le Clerc, E. Sauquet & M. Lang Hydrology Hydraulics Research Unit, Cernagref; Lyon, France Abstract For planning water management projects, design flood hydrographs are required. These hydrological tools are inputs for hydraulics modelling which provide a delineation of the flooded areas. These hydrographs are mostly relative to the instantaneous discharge associated to a predetermined return period and their shape is computed by mathematical formulations. In this paper, a method for deriving hydrological scenarios is presented. Ths method is based on the analysis of the observed hydrographs. Parameters describing the shape of the hydrographs are defined : K, the scale coefficient, ECARTY, a parameter characterising the spread near the peak and, ASY, the asymmetric parameter and a duration 6 dnch reflects the dynamic of the observed floods. ECARTY represents the concentration of the volume around the pe

Keywords