So what types of products are possible with ESP? Output data types are typical of any hydrologic model and may include stage, minimum or maximum discharge, and runoff volume. The big difference is that a probabilistic value can be tied to a specific stage or discharge. Reservoir inflows can use runoff values as a management tool for operation of a water resource project. ESP results can also be put through a statistical analysis to produce exceedance probabilities, conditional streamflow values, and flood inundation likelihood maps.