PCWA-L 480.pdf - PCWA Middle Fork American River Project ...

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Creating a Cohort
4·12
How the P-value estimate calculation works
Try a new P-value until
Final weight - Start weight'" Total growth
In pseudocode, the calculation runs as follows:
Until calculated growth =observed growth (final weight - start weight) do:
{ .
}
Guess ata P-value
For the total number ofsimulation days do:
{
Use the P-value to calculate growth
increment to the next day
Total growth =previous growth plus today's growth
}
If total growth does not equal observed growth, repeat with a new P-value
Note that the P-vaJue is cOlisidered·acceptable when the percent difference between estimated
total growth and observed growth is less than or equal to 0.001%
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