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and modelling) provided die range and variation of the model parameterization for die 
model calibration. The model results must fall witiiin die scope of uncertainty in the des 
tination parameters of the calibration and validation. 
The plausibility of die morphodynamic model components was checked using regular 
measurements of die seabed in connection with adequate spatial and temporal interpola 
tion methods. Besides volumetric analysis of seabed evolution, bed forms and changes in 
the sediment mixture are also relevant. 
An example of the validation of hydrodynamic model components is the documented 
comparison of measurements with simulation results for waves and water levels (M2- 
components). Given diat there was a large number of a different model results available, 
only two comparisons were documented for waves and water level (harmonic analysis: 
M2-tide), see Fig. 14. 
Figure 14: Comparison measurements / calculation (left: waves / right: water level). 
Sediment transport cannot be acceptably validated simply by comparing measured data at 
certain locations. The measurement methods and uncertainties concerning the interpreta 
tion of die data, as well as the scarce availability of spatiotemporal data, cannot be directly 
compared with the model results themselves. 
To ensure the plausibility of the morphodynamic model constituents three main pa 
rameters are taken into account: 
1. morphologic space, 
2. volumetric changes of the bathymetry and 
3. histograms of sediment volume / mass transport. 
5.4 Sensitivity studies 
Miscellaneous sensitivity studies were set up to investigate the influence of sediment 
transport and morphodynamic relating to the 
• influence of wind / wave action (KÖSTERS and WINTER 2014), 
• porosity (PLÜß and KÖSTERS 2014), 
• sediment mixture (VALERIUS, KÖSTERS and Zeiler 2014), 
• long term simulations (PuTZAR and MALCHEREK 2012; PuTZAR and MALCHEREK 
2014; MlLBRADT 2011), and 
• mean sea level rise (PLÜß and Kösters 2014).