UNIVERSITY OF THE DISTRICT OF COLUMBIA
School of Engineering and Applied Sciences
Department of Civil Engineering
CVEN-325: HYDROLOGY AND HYDRAULICS LEC
Due Date: 10/11/2018
a. Excess Rainfall
c. Runoff Volume
d. Drainage Density
e. Peak Discharge
f. Time of Concentration
g. Peak Time
h. Lag Time
i. Base Flow
j. Flow Recession
k. Unit Hydrograph
2- What is the difference between Flow Hydrographs and Rating Curves?
3- To measure flow rate in a stream, the velocity-area method was used by dividing the
cross section of the stream into 5 segments of 10 feet each. Depth and velocity
measurements are as given in the table below. Calculate the flow rate.
4- Draw the rating curve for a V-Notch weir that has a maximum height of 0.7 meters and a
weir constant of 2.2
5- Use the Rational Formula to calculate 100-year peak flow from a 37-acre grass covered
sandy soil with an average slope of 6% in Washington DC. The stream length for the
basin is 1.5 miles and the elevation of the stream drops by 200 feet from start to end.
(Hint: refer to page 30 in the class handouts)
6- Solve problems 9-17 and 9-19 from the “Practice Problems” provided in class.
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