FLOOD06195

• County: Statewide
• Community: State of Colorado
• Basin: Statewide
• Title: Measurment of Peak Discharge at Culverts by Indirect Methods
• Date: 6/1/1968
• Prepared By: G.L. Bodhaine
• Floodplain - Doc Type: Educational/Technical/Reference Information

22

1:
U
0: 80
"
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0-
n:
...
a
'"
'" 60
ii'
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"
...
a
...
...
a
... 40
Z
'"
U
0:
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0-
20

100

0'
'0

Figure 7.-Hydraulic properties of the paYed~invett pipe-arch.

Pipe-arch data for full flow arc as follows:

88,'n Rt.. Area R
n) (tn) (sq ft) (rt)
18 l! l.l 0,280
22 13 1,' ,3tO
" " 2.2 ,to(}
" 18 2.8 .446
36 22 ." ,,,"
'" 27 .. ,'11l
'" 31 8,7 ,791
" 36 11.4 ."1
" to 14.3 1.01
72 " 17.6 1.12

4. Type 1 flow can occur only if the criterion
of step 1 is met and h.< (d,+z). If type 1
lIow is identified, compute the discharge
with equations 4 and 5 as outlined below.
Type of flow must always be proved
after final computations are made.
Computation steps:

1. Compute C, the discharge coefficient.
2. Enter figure 10 with (h,-z)/D and select
value of d,/D from the appropriate curve.
Compute d,.
3. With this value of d" enter equation 4 am!
compute Q.
4. Compute "'IV,' /2g, h"_,, and A,.

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