Calculations
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Rectangular weirParshall flumeSodium hypochlorite generator (ACQUANOX®)Velocity gradient to Parshall meterFuller's formulaUASB check-list: hydraulic parametersPalmer-Bowlus meters
Flow
Input data
Diameter
Height
Output data
Flow
Description
Palmer-Bowlus meters are devices used to measure flow rates in open channels. Based on the width of the Palmer-Bowlus flume throat and the liquid height, the system calculates the flow.
Palmer-Bowlus Meter Parameters
| D | D/2 | H | R | L1 | L2 | C | y |
|---|---|---|---|---|---|---|---|
| 4" | 2" | 6" | 2/3" | 17" | 10" | 4 5/8" | 1 13/16" |
| 6" | 3" | 8" | 1" | 25" | 14" | 6 5/8" | 2 13/16" |
| 8" | 4" | 10" | 1 1/3" | 33" | 18" | 8 5/8" | 3 13/16" |
| 10" | 5" | 12" | 1 2/3" | 41" | 22" | 10 5/8" | 4 13/16" |
| 12" | 6" | 14" | 2" | 49" | 26" | 12 5/8" | 5 13/16" |
| 15" | 7 1/2" | 17" | 2 1/2" | 61" | 32" | 15 5/8" | 7 5/16" |
| 18" | 9" | 20" | 3" | 73" | 38" | 18 5/8" | 8 13/16" |
| 21" | 10 1/2" | 23" | 3 1/2" | 85" | 44" | 21 5/8" | 10 5/16" |
| 24" | 12" | 26" | 4" | 97" | 50" | 24 5/8" | 13 5/16" |
| 27" | 13 1/2" | 29" | 4 1/2" | 109" | 56" | 30 5/8" | 13 5/16" |
| 30" | 15" | 32" | 5" | 121" | 62" | 30 5/8" | 14 13/16" |
| 36" | 18" | 38" | 6" | 145" | 74" | 36 5/8" | 16 13/16" |
| 42" | 21" | 44" | 7" | 169" | 86" | 42 5/8" | 20 13/16" |
| 48" | 24" | 50" | 8" | 193" | 98" | 48 5/8" | 23 13/16" |
Parameter Table
| Parameter | Standard Units | Description |
|---|---|---|
| Diameter | inches (in) | Width of the flume throat |
| Height | meters (m) | Height of the liquid above the bottom |
| Flow | liters/second (L/s) | Amount of liquid flowing per second |
Note: Accurate measurement of height and diameter is essential for precise flow calculation.