CIV E 445 - APPLIED HYDROLOGY
SPRING 2014
LAB No. 11 SOLUTION

  1. The peak flow is 135.686 m3/s and it occurs at t = 6 hr.

  2. The results are shown below. The peak outflow is 9.214 m3/s, and it occurs at 60 min.

  3. Using the kinematic wave applicability criterion (Eq. 9-44):

    N = ( 6 hr × 3600 s/hr × 0.015 × 1.5 m/s) / (3 m) = 162.

    Since N = 162 > 85, this flood wave can be considered a kinematic wave.

  4. Using the diffusion wave applicability criterion (Eq. 9-60):

    M = ( 6 hr × 3600 s/hr × 0.005 × (9.81 m/s2 / 3.0 m)1/2 = 195.

    Since M = 195 > 15, this flood wave can be considered a diffusion wave.