2) A trapezoidal channel lined with grass (n = 0.027) has a bottom width of 4.25 feet, side slopes of 2 horizontal to 1 vertical, and a slope of 1.1 percent. Water is flowing at a depth of 2.35 feet. What is the discharge? Use Manning Equation and then check with the Manning's Charts.
2) A trapezoidal channel lined with grass (n = 0.027) has a bottom width of 4.25 feet, side slopes of 2 horizontal to 1 vertical, and a slope of 1.1 percent. Water is flowing at a depth of 2.35 feet. What is the discharge? Use Manning Equation and then check with the Manning's Charts.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question

Transcribed Image Text:2) A trapezoidal channel lined with grass (n = 0.027) has a bottom width of 4.25 feet, side slopes of 2 horizontal to 1
vertical, and a slope of 1.1 percent. Water is flowing at a depth of 2.35 feet. What is the discharge? Use Manning
Equation and then check with the Manning's Charts.

Transcribed Image Text:FIGURE A-3. (CHART 18) CHANNEL CHARTS FOR THE SOLUTION OF MANNING'S EQUATION.
- 21.0
-18.0
-15.0
-12.0
-16.0
00:6-
8.00
002-
100ウト
-5.00
4.00
DO'E
-2.00
7.80
09-
-1.20
11.00
-0.90
-080
-070
-a.co
-0.50
-6.45
-040
-0.35
DE D
-0.25
aza
S10-
-0.12
40.10
POD
2007
F.P.S.
VELOCITY
38 38 38
65
P
3
n=.03
DEPTH IN FEET
7:2
15-1
8 8 6 5 VASCALE
SOU
WAN
8967
U
37 3335
N
5
A
T
83
MAX
N
CHART
5
SLOPE FEET PER FOOT
100000
18
AVEN
6
1
-072
3091
&
ba
360
2005
€0050
0 06 09 04 77 29
S
DISCHARGE CUBIC FEET PER SECOND-Q
M
15.0
12.0
10.0-
9.00-
8.00-
7.00-
10
M
5.00-
4,00
3.00-
-002
1.80.
Fost
0.60 2
1.20-
-007
0.90
0.00
0.70-
-050
045
Fore
0.35-
DE'D
0.25
Fozo
$10
0.12.
0.10
0.08.
-30'0
Qn
CHANNEL CHART
2:1
b = 5 FT
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