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Pass Behavior
This category appears only if the Operating Level Balancing method is selected in the Flood Control category.
The flood control method operates in one of two ways: on each pass it computes an additional release for each reservoir for the pass’s balance level, or it undoes any prior pass’s release schedule and recomputes from scratch, given the new balance level.
* Undo and Recompute Max Release
This is the default method.
For a given full reservoir FR, on a pass at balance level BL, pretend FR’s release schedule for the prior balance level did not happen. Thus, at each downstream control point, add back in the empty space consumed by FR’s prior release schedule, and at each tandem reservoir, subtract out the tandem storage scheduled on the prior pass. Then recompute the best release schedule for the full reservoir, as before, but this computation respects a new set of space reservations and tandem storages from other reservoirs, as computed on this and prior passes.
There are no slots specific to this method.
* Compute Additional Release
Whatever could be release from a full reservoir FR on any pass can still be released on the next pass, with the exception of the final pass, which is recomputed so that additional empty space will be used as early as possible in the release schedule.
This method can give different results than recomputing the release, due to interactions with other method selections and the function of the “trim” (Max Release Variation slot) value in the empty space computations at control points. See “Trim” (Max Release Variation) and Empty Space.
The main benefit of this method is to reduce complexity and thus runs may be faster. No performance comparisons have been made as of this writing.
There are no slots specific to this method.
Revised: 08/02/2021