online_time_of_concentration:   Time of concentration of small watersheds
References

[1] Kirpich formula (Eq. 2-61)

[2] Kerby-Hathaway formula (Eq. 2-62)

[3] Papadakis-Kazan formula

[4] Horton formula (Eq. 4-29)

[5] Kinematic wave formula (Eq. 4-50)

[6] Laminar flow formula (Eq. 4-28)

INPUT DATA:

Units:         (SI units) (U.S. Customary units)

Formula:    

Length L [all] (m) (ft):     

Slope So [all] (m/m) (ft/ft):     

Friction coefficient n [2,3,4,5]:     

Effective rainfall intensity i [3,4,5,6] (mm/hr) (in/hr):     

Rating exponent m [4,5]:     

Water temperature T [6] (oC) (oF):     

OUTPUT:

Please enter input data
and press 'Calculate'.

⇐ ⇐ ⇐

[You may leave any input variable
blank if not needed by formula].

            

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