Use the kinematic wave model to compute the time of concentration, the maximum runoff rate...

Use the kinematic wave model to compute the time of concentration, the maximum runoff rate, and the maximum water depth from an area 73.2 m (240 ft) long, 1 unit wide with a longitudinal slope of 2.0 percent, and a Manning "n" value of 0.25. The soil for the pervious area has been classified as silty clay loam [see Example 6.3(a)] with an initial abstraction of 12.7 mm (0.5 in.). The rainfall intensity (RI) in mm/hr (in./hr) is given by

where b = 127 for RI in mm/hr (5.0, RI in in./hr), d = 8.0, e = 0.0, and t is time in min­utes. Use a 1-hr duration rainfall with dt = 1.0 minute. Assume the area is 100 percent pervious.