CIVE 401 Homework Assignment 2
Due Monday 9 February 2009
Work and turn in the following problems in Cruise et al (2007) (problem in bold is a
candidate for grading): 12.1, 12.9, 12.13, 12.15, and 12.16. Also, work and turn in the
following problems (problems 4 and 5 are candidates for grading):
(1) An asphalt-lined channel (n = 0.016) has a circular cross section with diameter 70
cm. The channel is flowing half full with a velocity of 4 m/s. What is the
volumetric flow rate, the Froude number, and the critical slope?
(2) A canal with triangular geometry and side slopes 0.70:1 is lined with clay tile (n =
0.014) and carries 8 m3/s. Find the critical depth, critical velocity, and critical
slope for this canal.
(3) A rectangular channel carries a flow per unit width of 2.5 m2/s. Plot the specific
energy diagram for this flow and find the two possible flow depths in this channel
for a specific energy of 2 m.
(4) A unit flow rate of 20 ft2/s occurs in a rectangular canal. A Pitot tube is
placed in the stream, causing the water level in the tube to rise to a level of 5
ft above the channel bed. Find the two possible flow depths in the canal for
this condition.
(5) Water flows with a steady rate of 1.5 (m3/s)/m in a rectangular channel. The
flow depth at cross section (1) is 0.4 m. The energy head loss between section
(1) and a downstream section (2) is 0.15 m. Plot the specific energy curve
and show the points corresponding to sections (1) and (2) on the curve. Is it
possible to have a head loss of 0.25 m between the two sections for this flow
rate? Explain.
Make sure that you read and follow the Policy on Homework posted on the course
website.
