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 (metric) U.S. Customary     (SI units) (U.S. Customary units) Formula:     [1] Kirpich [2] Kerby-Hathaway [3] Papadakis-Kazan [4] Horton [5] Kinematic wave [6] Laminar flow 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].   Your request was processed at  08:13:31 am on December 23rd, 2024   [ 241223  08:13:31 ]. Thank you for running online_time_of_concentration.   Please call again.   [070608]