How to Calculate Water Discharge in OFRB Outlets for Irrigation Method

Calculate Water Discharge in OFRB Outlet.

Learn how to calculate water discharge in OFRB outlets for irrigation using the formula Q=CBH^3/2. Get the existing size of the outlet, B, Y, and H. 

Irfan SBE is dedicated to providing helpful tips and guides for farming and irrigation practices. In this post, we will teach you how to calculate the discharge of water in OFRB outlets using the irrigation method.

What is an OFRB Outlet?

OFRB stands for Open Flume Rectangular Broad Crested Weir. It is a type of weir commonly used for measuring and controlling water flow in irrigation canals. An OFRB outlet is an opening that is created in a canal using a weir structure. It allows water to flow out of the canal and into the irrigation field.

Calculating Water Discharge in OFRB Outlets

To calculate the water discharge in OFRB outlets, you will need to know the existing size of the outlet, B, Y, and H. B is the width of the outlet, Y is the height of the outlet, and H is the difference between the crest level of the outlet and the full supply of canal water.
The formula for calculating the discharge of an OFRB outlet is Q=CBH^3/2. Q is the discharge, C is a constant value, and H is the value calculated above.

Calculating Water Discharge in OFRB Outlets

Auto Discharge Percentage

The calculated discharge of the OFRB outlet can be compared to the approved water discharge to determine the auto discharge percentage. This percentage will tell you whether the actual discharge is more or less than the approved water discharge.

Frequently Asked Questions (FAQs)

Q: Why is it important to calculate water discharge in OFRB outlets?
A: It is important to calculate water discharge in OFRB outlets to ensure the correct amount of water is supplied to the irrigation fields. This can help to maximize crop yields and prevent water wastage.
Q: What is the C value in the formula for calculating water discharge?
A: The C value is a constant value that is dependent on the B of the outlets and the units used in the formula. It can be calculated using various formulas based on the B of the outlets.

Conclusion

Calculating water discharge in OFRB outlets is an essential aspect of irrigation management. By using the formula Q=CBH^3/2, you can determine the amount of water flowing out of the canal and into the irrigation field. This can help to ensure that crops receive the correct amount of water, maximizing their growth and yield.

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