HYDROLOGIC CALCULATIONS :

A. Methodology

Text Box: Always provide the specific name of the model/calculation method utilized.

B. Time-of-Concentration (T c) on plans.

Text Box: Clearly show time-of-concentration (Tc) flow paths in plan view with contours and designate sheet, shallow concentrated, and channel flow segments (i.e., travel times).  Flow paths must be provided for both pre- and post-developed conditions.

C. Time of Concentration - Maximum Allowable Flow Length & Calculation Method (T c = Sum of travel times, T t 1 + T t 2 + T t 3…)

D. Drainage area characteristics vs. calculation of realistic discharges

 

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