The specific flow for a rectangular canal (see Figure 4) for which the bottom is 5 m wide is 2 m3/s/m. Knowing that the canals surface and walls have a Manning coefficient of 0.015, that the normal depth is 1.5m and that there is an obstacle down stream, you must: a) Identify the slope of the canal; b) Identify the backwater curve upstream of the obstacle presented on Figure 4; c) Find the distance separating yı from a measured depth of 2.2m and say if that point is up or down stream: d) Find the height of the obstacle if the measured depth immediately upstream is 2.5m; e) If the transition over the dam/spillway is done without head-loss, will there be a hydraulic jump? f) Presume that there is hydraulic jump, if the measured depth immediately downstream of this hydraulic jump is 0.9m, determine the power dispersed. Use a density of 1000 kg/m3
The specific flow for a rectangular canal (see Figure 4) for which the bottom is 5 m wide is 2 m3/s/m. Knowing that the canals surface and walls have a Manning coefficient of 0.015, that the normal depth is 1.5m and that there is an obstacle down stream, you must: a) Identify the slope of the canal; b) Identify the backwater curve upstream of the obstacle presented on Figure 4; c) Find the distance separating yı from a measured depth of 2.2m and say if that point is up or down stream: d) Find the height of the obstacle if the measured depth immediately upstream is 2.5m; e) If the transition over the dam/spillway is done without head-loss, will there be a hydraulic jump? f) Presume that there is hydraulic jump, if the measured depth immediately downstream of this hydraulic jump is 0.9m, determine the power dispersed. Use a density of 1000 kg/m3
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:The specific flow for a rectangular canal (see Figure 4) for which the bottom is 5 m wide is 2 m³/s/m.
Knowing that the canals surface and walls have a Manning coefficient of 0.015, that the normal depth is
1.5m and that there is an obstacle down stream, you must:
a) Identify the slope of the canal;
b) Identify the backwater curve upstream of the obstacle presented on Figure 4:
c) Find the distance separating y₁ from a measured depth of 2.2m and say if that point is up or down
stream:
d) Find the height of the obstacle if the measured depth immediately upstream is 2.5m;
e) If the transition over the dam/spillway is done without head-loss, will there be a hydraulic jump?
f) Presume that there is hydraulic jump, if the measured depth immediately downstream of this hydraulic
jump is 0.9m, determine the power dispersed.
Use a density of 1000 kg/m3
Q
y₁=2m
Figure 4
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Step 1: Data given
VIEWStep 2: (a) Slope of canal
VIEWStep 3: (b) Backwater curve upstream of obstacle
VIEWStep 4: (c) Distance separating y1 from measured depth 2.2 m
VIEWStep 5: (d) Find the height of obstacle
VIEWStep 6: (e) Checking hydraulic jump will occur at downstream of obstacle
VIEWStep 7: (f) Power dispersed
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