Examples
Examples
Try the starting example
- Rectangular weir width (m)
- 1
- Upstream head (m)
- 0.2
- Discharge coefficient
- 0.62
- Ideal sharp-crested rectangular discharge (m³/s)
- 0.163727
Try another scenario
- Rectangular weir width (m)
- 1.1
- Upstream head (m)
- 0.2
- Discharge coefficient
- 0.62
- Ideal sharp-crested rectangular discharge (m³/s)
- 0.1801
Calculation method
Calculation method
Ideal sharp-crested rectangular discharge (m³/s)
Q=(2/3) Cd width sqrt(2g) head^(3/2).
Symbols and units
- a
- Rectangular weir width (m)
- b
- Upstream head (m)
- c
- Discharge coefficient
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Free, aerated rectangular sharp crest; submergence, end contractions and approach velocity excluded. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. Free, aerated rectangular sharp crest; submergence, end contractions and approach velocity excluded.
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