Ill. Admin. Code tit. 35, § 302.658 - Stream Flow for Application of Human Nonthreshold Criterion

Current through Vol. 46, No. 16, April 15, 2022

The HNC shall apply at all times except during periods when flows are less than the harmonic mean flow (Qhm), as determined by:

Qhm = N / SUM(1/Qi)

Where:

Qhm

=

harmonic mean flow,

N

=

number of daily values for stream flows, and

Qi

=

daily streamflow value on day i.

Notes

Ill. Admin. Code tit. 35, § 302.658

Added at 14 Ill. Reg. 2899, effective February 13, 1990

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