Question

A 10-m wide, rectangular, concrete-lined canal (n=0.013) has a bottom slope of 0.01 and a constant-level lake at the upstream end. The steep canal carries a flow of is 250 m3/s and the critical and normal depths are 4m and 2.37m, respectively. The water level in the lake is 6.0 m above the bottom of the canal at the entrance. If the entrance losses are negligible, using Direct Step Method determine; i. The ﬂow depth 812 m downstream of the canal entrance; and ii. The distance from the lake where the ﬂow depth is 2.5 m. iii. Sketch the water profile.

Answer #1

Water flows in a rectangular concrete channel that is 10 m wide
and has a slope of 0.005. The depth of the uniform flow in the
channel (y1) is 450 mm and the discharge per width of
the water is 2.2 m2/s. The downstream channel is smooth,
and a hydraulic jump is forced to form in the channel by installing
a sill. Calculate:
(i) the depth and velocity of the water downstream of the
hydraulic jump;
(ii) the difference in...

A rectangular concrete channel
with n=0.013 is to be constructed on 0.5% slope:
1. Design for a flow rate of Q=18 m^3/s.
2. A 30 cm high, 5 m long broad crested weir is placed
in the channel. Calculate the depth upstream y1 and downstream y2
from the weir then get the head loss due to the hydraulic
jump

Water flows in a 4-m wide rectangular
open channel that has an n = 0.022, a slope of 0.005 m/m, and the
flow rate is 10 m3/s. A flow depth of 0.92 m
is located at a particular location in the channel. What type of
flow profile occurs at that location? Given the roughness value,
what is the likely channel material?
(Water surface profile classification
problem)
Hydraulic Engineering

A concrete, trapezoidal channel with a 5-m bottom width and side
slopes of 1:1 (H:V) discharges 35 m3/sec. The bottom slope of the
channel is 0.004. A dam is placed across the channel and raises the
water level to a depth of 3.4 m. determine the channel and flow
classification (e.g., M-2, S-1) upstream of the dam and explain
your supporting logic. then compute the water surface profile at
50-m intervals until you reach the hydraulic jump. Use a
spreadsheet...

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