This website uses a variety of cookies, which you consent to if you continue to use this site. You can read our Privacy Policy for
details about how these cookies are used, and to grant or withdraw your consent for certain types of cookies.
Filter By:
Flow Characteristics
Trapezoidal Flumes are rated as accurate to within +/2% by Humphreys and Bondurant and +/-2-5% by the U.S. Environmental Protection Agency. These accuracies are in line with other types of flumes.
The free-flow discharge equations for Trapezoidal Flume have not been standardized by industry or national standards. However, the equations for individual flumes (Q = cfs, H = feet) have been published in some academic articles and publications:
| Trapezoidal Flume Size | Flow Equation (Feet / CFS) |
|---|---|
| Small 60º | Q = 1.55 Ha2.58 |
| Large 60º | Q = 1.55 Ha2.58 |
| Extra Large | Q = 1.55 Ha2.58 |
| 8-inch 60º | Q = 2.22 Ha1.53 + 1.467 Ha2.5 |
| 12-inch 45º SRCRC (No. 1) | Q = 0.05 + 0.63 Ha1.5 + 3.23 Ha2.5 |
| 24-inch 38º SRCRC (No. 2) | Q = 0.19 + 1.67 Ha1.5 + 4.27 Ha2.5 |
| 2-inch 45º WSC | Q = 3.32 Ha2.18 |
Free-flow discharge tables for Trapezoidal Flumes can be found in the Discharge Tables section.
LOCATIONS IN ATLANTA, GA & BOISE, ID