Question

2.   Rational Hydrograph Use the values for storm intensities given below. That way we all should be on the same page. Just know where these came from.
Create hydrographs (sketch please) using the Rational triangular method for the three subareas detailed below. To make sure everyones’ calculations are the same the intensities based on the time of concentration are:
Subarea 1 toc 13 minutes i = 3.5 inches per hour
Subarea 2 toc 17 minutes i = 3.0 inches per hour
Subarea 3 toc 11 minutes i = 3.7 inches per hour

Subarea Area(acres) C tc(min)
1 17.2 0.31 13

2 14.3 0.40 17

3 9.5 0.28 11

Answer 1