Time-dependent Sobol' sensitivity of hydrologic processes

The plot on top is showing the results of the Sobol' sensitivity analysis of the hydrologic modeling framework Raven. The sensitivities of eleven processes are shown as their averages per day of the year (colored bars). The simulation period is 1991 to 2010 while the first two years are discarded as warm-up period. The sensitivities are normalized such that they sum up to 1.0 at every day of the year. The sensitivities are variance-weighted averages. The (average) weight of each day of the year is shown in the plot below (black line). The weights for every time step are determined by the average simulated discharge at this time step.