CE 4200 : Exam 2 CE4200 Fall 2013
Document Summary
The annual-maximum 24-hour rainfall data on an area show a mean of 320 mm and a standard deviation of 156 mm. The idf curve for the 50-year storm on the area is given by i. 0. 65 where i is the rainfall intensity in mm/hour and t is the storm duration in minutes. Calculate the annual-maximum 12-hour rainfall depth with a return period of 200,000 years. A soil has the horton infiltration parameter f0=100 mm/hr, fc=50 mm/hr, and k=0. 05 min-1. 60-min storm with a uniform rainfall intensity of 80 mm/hour, calculate ponding time pt time from new origin to the ponding time pt , and the total infiltration (mm) at t = 1 hour by the. A watershed area consists of sandy loam which typically has a saturated hydraulic conductivity of 11 mm/h, average suction head of 110 mm, porosity of 0. 453 and initial soil moisture content and the of 0. 1375.
