 | A training manual in conducting a workshop in the design, construction, operation, maintenance and repair of hydrams |
 |  | Session 3: Water measurement techniques (3 hours) |
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Handout 3C: Weir table
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Height of water above weir notch in inches |
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0 |
1/8 |
1/4 |
3/7 |
1/2 |
5/6 |
3/4 |
7/8 |
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0 |
000 |
.0748 |
.374 |
.673 |
1.047 |
1.421 |
1.945 |
2.394 |
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1 |
2.992 |
3.516 |
4.114 |
4.787 |
5.46 |
6.134 |
6.882 |
7.63 |
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2 |
8.452 |
9.2 |
10.098 |
10.92 |
11.818 |
12.716 |
13.614 |
14.586 |
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3 |
15.484 |
16.531 |
17.503 |
18.55 |
19.523 |
20.645 |
21.692 |
22.814 |
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4 |
23.936 |
25.058 |
26.18 |
27.377 |
28.499 |
29.696 |
30.967 |
32.164 |
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5 |
33.436 |
34.707 |
35.979 |
37.25 |
38.522 |
39.868 |
41/215 |
42.561 |
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6 |
43.908 |
45.329 |
46.75 |
48.171 |
49.518 |
51.014 |
52/435 |
53.931 |
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7 |
55.352 |
56.848 |
58.344 |
59.915 |
61.411 |
62.982 |
64.552 |
66.048 |
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8 |
67.694 |
69.265 |
70.836 |
72.481 |
74.127 |
75.772 |
77.418 |
79.064 |
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9 |
80.784 |
82.504 |
84.15 |
85.87 |
87.591 |
89.311 |
91.032 |
92.827 |
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10 |
94 547 |
96.342 |
98.138 |
99.933 |
101.73 |
103.6 |
105.393 |
107.263 |
Flow rate per inch of weir notch in gal/min.
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