TM 5-818-5/AFM 88-5, Chap 6/NAVFAC p-418
U. S. Army Corps of Engineers
Figure F-7. Effective area factor for partially filled pipe.
Table F-1. Flow (gallons per minute) from Vertical Pipes
Height of Crest H
Nominal Diameter of Pipe, inches
8
5
6
4
3
2
inches
160
85
110
43
68
22
l-1/2
230
160
120
55
93
26
2
385
185
250
74
130
33
3
520
88
38
230
320
4
155
630
270
380
99
175
44
5
730
300
430
110
190
48
6
900
510
360
125
225
56
8
1050
580
400
255
140
62
10
1150
440
640
280
160
69
12
1300
500
700
315
175
78
15
1400
540
780
350
195
85
18
1550
850
595
210
380
93
21
1650
640
230
400
920
100
24
U. S. Army Corps of Engineers
F-4
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