GPM FOR Y=12" AND VARIOUS VALUES OF X
______________________________________________________________________
Distance X=
8"
10"
12"
14"
16"
18"
20"
22"
24"
26"
______________________________________________________________________
D = l.61"
1 1/2" Std pipe
17
21
25
30
34
38
42
47
51
55
D = 2.07"
2" Std pipe
28
35
42
49
56
63
70
77
84
91
D = 4.03"
4" Std pipe
106 132 159 185 212 238 264 291 318 344
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Distance X = 28" 30"
32"
34"
36"
38"
40"
42"
44"
46"
48"
______________________________________________________________________
D=l .61"
1 1/2" Std pipe 59
64
68
72
76
80
85
89
93
97
102
D = 2.07"
2" Std pipe
98
105
112
119
126
133
140
147
154
160
167
D = 4.03" "
4" Std pipe
371 397
424
450
477
503
530
530
556
583
609
Table 5-1. Discharge of water from full-flowing horizontal pipes.
c. Streams. Several methods are available to the preventive medicine
specialist for measuring the flow of a moving stream--a very common source of field
water supplies. Two methods wiII be discussed here--the v-notch weir and the floating
stick.
(1) V-notch weir. A weir is a baffle made of wood or metal, which is
constructed across a waterway in the same manner as a dam, for raising the water level
or in order to retard, divert, or measure the flow. A weir used to measure the flow has
MD0160
5-4