I hope your help hydraulic question thanks
Extracted text: concentration using the SCS Lag equation and the FAA formula, Pespe 3. Problem 3.5 (page 115): A concrete-paved parking lot (surface slope 0.5%) has a sheet flow path length of 150 ft, followed by a 50-ft-long gutter (bed slope 0.2% and depth 0.5 ft). The 2-year 24-hr rainfall is 3.5 in. Estimate the time of concentration using the Kirpich formula, the Kerby formula, and the TR-55 method, respectively. nno basin has a composite curve number of 78 when it receives a 30-