A preliminary investigation of the integration of modelled floodplain hydraulics with estimates of overbank floodplain sedimentation derived from Pb-210 and Cs-137 measurements

This paper investigates the possibility of linking finite element modelled two-dimensional hydraulics with floodplain sedimentation rates derived from radionuclide dating techniques. The TELEMAC-2D system is used to simulate the full dynamic velocity vector and water depth distributions for a 1 in 1 2 year flood event for the River Culm, Devon. These are compared to pattern s of medium-term (30-100 years) sedimentation rates and a degree of correla tion is found to exist. This information is used to comment on the complexi ty of flow and sediment deposition interactions in floodplain environments and to provide a research design for the development of a more fully integr ated floodplain morphodynamic model. Copyright (C) 1999 John Wiley & Sons, Ltd.