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Depression Storage

If a value greater than 0 for depression storage depth is entered, the following method is used for computing Ri(t) (the SCS CN method is not used).

Ri(t) = 0.0 when Pa(t) is less than Ds. Otherwise:

(9.45)

Where:

Ri(t)

=

Impervious area runoff (in) during time step t

 

Pa(t)

=

Cumulative rainfall (in) through time step t

 

Ds

=

Storage depression depth (in)


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