Discharge For Cipolletti Weir Calculator

Cipolletti Weir Formula:

\[ Q_C = \frac{2}{3} \times C_d \times \sqrt{2 \times g} \times L_w \times S_w^{3/2} \]

Coefficient of Discharge (Cd):

Acceleration due to Gravity (g):

m/s²

Length of Weir Crest (Lw):

Height of Water above Crest of Weir (Sw):

Discharge by Cipolletti (QC):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Cipolletti Weir Formula?

The Cipolletti Weir formula calculates the discharge rate of liquid flow over a weir. It provides an accurate measurement of flow rate based on the weir's physical characteristics and the height of water above the weir crest.

2. How Does the Calculator Work?

The calculator uses the Cipolletti Weir formula:

\[ Q_C = \frac{2}{3} \times C_d \times \sqrt{2 \times g} \times L_w \times S_w^{3/2} \]

Where:

\( Q_C \) — Discharge by Cipolletti (m³/s)
\( C_d \) — Coefficient of Discharge
\( g \) — Acceleration due to Gravity (m/s²)
\( L_w \) — Length of Weir Crest (m)
\( S_w \) — Height of Water above Crest of Weir (m)

Explanation: The formula accounts for the gravitational acceleration and the geometric properties of the weir to determine the flow rate of liquid passing over it.

3. Importance of Discharge Calculation

Details: Accurate discharge calculation is crucial for hydraulic engineering, water resource management, irrigation systems, and flood control measures.

4. Using the Calculator

Tips: Enter the coefficient of discharge, acceleration due to gravity, length of weir crest, and height of water above crest. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the typical value for Coefficient of Discharge?
A: The coefficient of discharge typically ranges from 0.6 to 0.8 for most weirs, depending on the weir geometry and flow conditions.

Q2: Why is acceleration due to gravity important?
A: Gravity provides the driving force for fluid flow over the weir, making it a critical factor in discharge calculations.

Q3: What units should be used for input values?
A: Use meters for length measurements, m/s² for gravity, and ensure the coefficient of discharge is dimensionless.

Q4: Are there limitations to this formula?
A: The formula assumes ideal flow conditions and may need adjustments for very low or very high flow rates, or for weirs with unusual geometries.

Q5: Can this calculator be used for all types of weirs?
A: This calculator is specifically designed for Cipolletti weirs. Other weir types may require different formulas.