Sensitivity analysis (SA) estimates the impact of changes in factor values (e.g., parameters, states or input variables) on the simulated model response of interest [e.g., Wagener and Kollat, 2006]. From an uncertainty viewpoint, SA investigates the influence of factor uncertainties on the uncertainty in the model response [e.g., Saltelli et al., 2004], hence, “sensitivity” and “influence” are used interchangeably