This category appears only if the Operating Level Balancing method is selected in the Flood Control category.

Throughout the flood control computations, the Operating Level Balancing method converts operating levels to storages and vice versa. The mappings used for these conversions are defined in the Operating Level Table, which is a periodic slot, that is to say, the mapping changes with time. This method category exists to determine which timestep is used for the Operating Level Table lookups (interpolations).

This is the default method.

Use the current rules controller’s simulation timestep for the periodic slot lookups and interpolations. When selected, the current simulation timestep is the date used in the (interpolated) table look-up, even when looking up such things as forecast storages at the end of the balance period. Thus, if a storage V translates to operating level 8.0 on the current simulation timestep, but to operating level 8.1 at the end of the balance period, and V is the storage at the end of the balance period, the operating level at the end of the balance period will be considered 8.0.

There are no slots specific to this method.

Use forecast timestep in question for the periodic slot lookups and interpolations, when looking up storages and levels at that timestep. Thus, if a storage V translates to operating level 8.0 on the current simulation timestep, but to operating level 8.1 at the end of the balance period, and V is the storage at the end of the balance period, the operating level at the end of the balance period will be considered 8.1.

There are no slots specific to this method.