Author(s): Chen-Chien Li; Bernhard Westrich
Linked Author(s): Bernhard Westrich
Keywords: Stochastic; Uncertainty; Data generation; Water level; Erosionrate; Deposit height; Sediment mobility; Resuspended sediment mass
Abstract: Due to the interactions of complex processes in a river system and the variability of the process parameters stochastical concept has been combined with a deterministic transport model to simulate suspended sediment transport. Stochastic characteristics of the governing parameters such as river discharge and concentration of suspended matters are introduced to cope with the uncertainty of the forecasting calculation results. For a 11 km lock regulated river section long term simulations were carried out using stochastic generated discharge data. The water level, sediment erosion volume and river bed evolution are of interest. A statistical summary plot was made to show the quantiles of predicted water levels. The impact of flood events on the sediment transport process with regard to the peak flow rate and flood duration were also investigated. The result shows that 1750 m3/s will be the maximum peak flow rate of the possibly coming flood event and a reduction of the deposit height of about 1.5m will be expected during this period.
Year: 2001