9.33. A pine forest is to be cleared for a development in which all the trees on the site will be removed. The IDF function for the area is given

by i=\frac{2819}{t+16} where i is the average rainfall intensity in mm/h and t is the duration in minutes. The storage capacity of the trees in the forest is estimated as5 mm, the leaf area index is 6, and the evaporation rate during the storm is estimated as 0.3 mm/h. Determine the increase in precipitation reaching the ground during a 30-min storm that will result from clearing the site.