reduce the size of the input data set, and (iii) the use of sensitivity methods requiring a small number of model executions. All three approaches speed-up the sensitivity analysis, but involve drawbacks in accuracy as well. Therefore the speed-accuracy tradeoff plays an important role in all the approaches. To conduct an efficient sensitivity analysis it is necessary to make an informed decision on this tradeoff. For this it is fundamental that hydraulic engineers know how the use of different models, input reduction methods and sensitivity methods affect the results of a sensitivity analysis. This is currently unclear. |