32 
MEASUREMENT AND DIVISION OF WATER. 
DISCHARGE OVER CIPOLETTl’s TRAPEZOIDAL WEIRS OF 
VARIOUS LENGTHS AND WITH VARIOUS DEPTHS. 
3 ^ 
Formula, D = 3.3J L II 2 . 
1 'epth of wa¬ 
ter on crept. 
DISCHARGE IN CUBIC FEET PER SECOND OVER WEIR. 
In 
Ins. 
In 
Feet. 
1 ft. 
Long. 
Wz ft. 
Long. 
2 ft. 
Long. 
3 It. 
Long. 
4 ft. 
Long. 
5 ft. 
Long. 
10 ft. 
Long. 
O 
. o 
.025 
.0135 
.0202 
.0269 
.0404 
.0539 
.0673 
.1347 
.6 
.05 
.0377 
. 0566 
.0754 
.1131 
.1508 
.1885 
.3771 
.9 
.075 
1 
.0690 
.1035 
.1380 
.2071 
.2761 
.3451 
• .6902 
1.2 
.10 
.1064 
.1596 
.2128 
.3192 
.4256 
.5319 
1.0639 
1.5 
.125 
.1488 
.2232 
.2976 
.4464 
.5952 
.7440 
1.4881 
1.8 
.15 
.1956 
.2934 
.3912 
.5868 
.7824 
.9780 
1.9560 
2.1 
.175 
.2464 
.3697 
.4929 
.7363 
.9858- 
1.2322 
2.4644 
2.4 
.20 
.3010 
.4515 
.6020 
.9029 
1.2039 
1.5049 
3.C098 
2.7 
.225 
.3592 
.5388 
.7184 
1.0777 
1.4369 
1.7961 
3.5922 
3.0 
.25 
.4208 
.6312 
.8417 
1.2625 
1.6833 
2.1041 
4.2083 
3.3 
.275 
.4855 
.7282 
.9709 
1.4564 
1.9419 
2.4273 
4.8547 
3.6 
.30 
.5531 
.8297 
1.1063 
1.6594 
2.2126 
2.7657 
5.5314 
3.9 
.325 
.6238 
.8358 
1.2477 
1.8715 
2.4954 
3.1192 
6.2384 
4.2 
.35 
.6972 
1.0459 
1.3945 
2.0917 
2.7890 
3-4862 
6.9724 
4.5 
.375 
.7730 
1.1595 
1.5460 
2.3190 
3.0920 
3.8649 
7.7299 
4.8 
.40 
.... 
1.2777 
1.7035 
2.5553 
3.4071 
4.2588 
8.5177 
5.1 
.425 
1.3993 
1.8658 
2.7987 
3.7316 
4.6645 
9.3290 
5.4 
.45 
1.5246 
2.0328 
3.0492 
4.0656 
5.0820 
10.1640 
5.7 
.475 
1.6534 
2.2045 
3.3067 
4.4089 
5.5112 
11.0225 
6.0 
.50 
1.7854 
2.3805 
3.5708 
4.7610 
5.9512 
119025 
8.3 
. 525 
1.9210 
2.5614 
3.8420 
5.1227 
6.4034 
12.8068 
6.6 
.55 
2.0599 
2.7465 
4.1198 
5.4930 
6.8663 
13.7326 
6.9 
.575 
2.2018 
2.9357 
4.4036 
5.8715 
7.3393 
14.6787 
7.2 
.60 
2.3472 
3.1293 
4.6939 
6.2585 
7.8231 
15.6463 
7.5 
.625 
2.4955 
3.3274 
4.9911 
6.6548 
8.3185 
16.6370 
7.8 
.65 
• _ 
2.6462 
3.5283 
5.2924 
7.0565 
8.8206 
17.6413 
8.1 
.675 
2.8007 
3.7343 
5 6014 
7.4086 
9.3357 
18.6715 
