4.3.2 Error Criterion
The optimization criterion is to minimize the normalized RMS error of the flows. The total error is calculated by:
Sum for all n: RMS error of hourly flows
where n is the number of streamflow stations used for comparison.
A provision is made to select the stations to include in the error calculation by a sequence of binary flags in the first line of data of the strfw\XXXXXX.str file.
111011111000000000000000000000000000000 9 168 168 1----------93 01 03 00 4801 554 GRND/GALT 4833 545 W. MONTROSE . . .
In this example, there are 9 streamflow stations (40 are possible) and all but the 4th station are used in the error calculation. These flags can change from one event to the next.
These are the first lines in each of three .str files for three events that are chained:
In this example, the error for all stations used for comparison will not be included in the total error for the first event. The error for stations 1, 2, 3, 5, 6, 7, 8, and 9 will be used for the second and third events. Thus, flow station 4 is ignored (so could be used for validation).
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