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online calculation of time of concentration, hydrology. urban hydrology, Victor Miguel P... <br />_ 70 <br />R orences <br />[I] Kirpich formula <br />(Eq. 2 -61) <br />[2] Kerby - Halhaway <br />formula (Eq. 2 - 62) <br />[3] Papadakis -Kazan <br />formula <br />[41 Horton formula <br />(Eq. 4 -29) <br />_51 KCrematic wave <br />formula (Eq. 4 -50) <br />i5j Laminar flow <br />formula (Eq. 4 -28) <br />Cori -IT DATA <br />Stream (optional)_ <br />Last Chance Sediment Pond 91 <br />SI (metric) <br />Units: U.S. Customary <br />i U.S. Customary un!ls) <br />Formula: [1] Kirpich <br />Length L [all] i!i�.)',ft): 540 ft <br />Slope S [ , j 0.0352 <br />Gig <br />Frict on coefficient n [2.3.4.5;: <br />Effective rainfall intensity i `l 1 -, <br />(i n:hr): 5.22 <br />OUTPUT: <br />Stream: Last <br />Chance Sediment <br />Pond #1 <br />U.S. Customary <br />units. <br />[1] Kirpich formula. <br />• Time of <br />concentration t <br />3.59 min <br />http:// ponce. sdsu. edu /onlinetiincofconcentration.php 2/26/2010 <br />