(a) The figure below shows a cross-section of a canal, which is to carry 44 m3/sec. The canal is lined with concrete, for which the manning coefficient is 0.014. (i) Calculate the longitudinal bed slope of this canal. (ii) If the flow in the canal were to decrease to 22 m3/sec and all other data including the slope and n being the same, what would be the water depth? 15.1 m- 1.5:1 3.0 m 1.5:1 5.41 m 6.1 m
(a) The figure below shows a cross-section of a canal, which is to carry 44 m3/sec. The canal is lined with concrete, for which the manning coefficient is 0.014. (i) Calculate the longitudinal bed slope of this canal. (ii) If the flow in the canal were to decrease to 22 m3/sec and all other data including the slope and n being the same, what would be the water depth? 15.1 m- 1.5:1 3.0 m 1.5:1 5.41 m 6.1 m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:(a) The figure below shows a cross-section of
a canal, which is to carry 44 m3/sec. The canal
is lined with concrete, for which the manning
coefficient is 0.014.
(i) Calculate the longitudinal bed slope of this
canal.
(ii) If the flow in the canal were to decrease to
22 m3/sec and all other data including the
slope and n being the same, what would be
the water depth?
15.1 m-
3.0m
1.5
5.41 m
(b) A vertical sluice gate with an opening of
0.67 m produces a downstream jet with a
depth of 0.4 m when installed along a
rectangular channel, 0.5 m wide, conveying a
steady discharge of 20 m³/sec. It is assumed
that the flow downstream of the gate
eventually returns to a uniform flow depth of
2.5 m.
(i) Calculate the energy-head loss in the jump.
(ii) What are the conjugate depths of this
hydraulic jump (initial and sequent depths).
(c) Identify and sketch the Gradually Varied
Flow (GVF) profile in three slopes which could
be described as mild, critical, and milder
respectively. The three slopes are in series.
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