The Kn factor in the Uniform Flow Section Factor is what value?

• A. 1.086
• B. 1.486
• C. 2.367
• D. 0.746

Answer: (B)

The Kn factor, which is an important component in the Uniform Flow Section Factor, is defined as 1.486. This value is specifically used in the context of open channel flow, where it helps to relate the flow velocity to the hydraulic radius of the channel. The Kn factor is derived from the principles of fluid dynamics and is essential for calculating the flow in wide and uniform open channels, as it plays a crucial role in determining the relationship between flow rate and channel geometry.

Understanding the significance of the Kn factor is important for engineers involved in the design and analysis of hydrological systems. The value of 1.486 specifically accommodates the units involved and aligns with Manning's equation for calculating velocity, which in turn is used to find flow rates and design channel sections effectively.