1. What is the Bazin Formula?

The Bazin Formula calculates the discharge coefficient for flow over a weir, accounting for the height of water above the crest. It provides a more accurate coefficient than simpler formulas, especially for various flow conditions.

2. How Does the Calculator Work?

The calculator uses the Bazin Formula:

Where:

• Height of Water above Crest of Weir (Sw) — Measured in meters (m)

Explanation: The formula adjusts the base coefficient of 0.405 based on the water height above the weir crest, providing a more accurate discharge coefficient for flow calculations.

3. Importance of Bazin's Coefficient

Details: Accurate coefficient calculation is crucial for determining flow rates over weirs, which is essential in hydraulic engineering, water resource management, and irrigation system design.

4. Using the Calculator

Tips: Enter the height of water above the crest of the weir in meters. The value must be valid (greater than 0).

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for Bazin's Coefficient?
A: The coefficient typically ranges from 0.405 to higher values, depending on the water height above the weir crest.

Q2: When should the Bazin Formula be used?
A: It should be used for calculating discharge coefficients in weir flow calculations, particularly when more accurate results are needed than simpler formulas provide.

Q3: What are the limitations of the Bazin Formula?
A: The formula may be less accurate for very small or very large water heights, and for weirs with unusual geometries or flow conditions.

Q4: How does water height affect the coefficient?
A: As water height increases, the additional term (0.003/Sw) decreases, making the coefficient approach 0.405 from above.

Q5: Can this formula be used for all types of weirs?
A: The Bazin Formula is primarily designed for sharp-crested weirs. Different formulas may be needed for other weir types.