53:078 Principles of Hydrology (Spring 2004)
Problem #3
Water Budget Application to a Parking Lot During a Storm

A storm produced intense rainfall on a shopping mall parking lot.  The average rainfall intensity (i) for each 5-min period was recorded, as well as the instantaneous runoff rate (Q) at the outlet of the parking lot's storm sewer.  Use these data to predict the maximum depth of ponded water (in inches) on the parking lot during the storm.
  1. Compute the precipitation depth (in inches) for each 5-min interval of the storm.
  2. Compute the depth of discharge (in inches) for each 5-min interval.
  3. Compute the change in storage DS (in inches) for each 5-min interval.
  4. Compute the storage depth S (in inches) at the end of each 5-min interval.  Assume that storage depth is initially zero.
  5. What is the maximum depth of ponded water (in inches) for this storm?
Last changed on 01/24/04 by aab.