Problem 2. A 25-foot wide rectangular channel with Manning’s n
of 0.025 is carrying 5000 cfs. The slope of the channel is 0.05%
(0.0005 ft/ft). At a specific point, the slope changes abruptly to
5%. Using the direct step method, calculate the profile upstream of
the break in slope, extending upstream to a point where the depth
is within 5 percent of normal depth. (That means the final depth in
your direct step method is between 0.95 and 1.05 times...