Wetted Area For Rectangle Calculator

Formula Used:

\[ A_{rect} = B_{rect} \times D_f \]

Wetted Surface Area of Rectangle (A_rect):

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1. What is Wetted Surface Area of Rectangle?

The Wetted Surface Area of Rectangle [length²] is the total area of outer surface in contact with the surrounding water in a rectangular channel cross-section.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ A_{rect} = B_{rect} \times D_f \]

Where:

\( A_{rect} \) — Wetted Surface Area of Rectangle (m²)
\( B_{rect} \) — Width of Section of Rect Channel (m)
\( D_f \) — Depth of Flow of Channel (m)

Explanation: The formula calculates the area of the rectangular cross-section that is in contact with water by multiplying the width of the channel by the depth of water flow.

3. Importance of Wetted Area Calculation

Details: Accurate wetted area calculation is crucial for hydraulic engineering, flow rate calculations, friction loss estimation, and channel design in civil and environmental engineering applications.

4. Using the Calculator

Tips: Enter the width of the rectangular channel section and the depth of water flow in meters. Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for the inputs?
A: The calculator expects inputs in meters (m) for both width and depth, and returns the area in square meters (m²).

Q2: Can this calculator be used for partially filled rectangular channels?
A: Yes, this calculator works for both fully and partially filled rectangular channels as long as the depth measurement represents the actual water depth.

Q3: How does wetted area differ from cross-sectional area?
A: For rectangular channels, the wetted area is typically the same as the cross-sectional area of water flow, representing the area in contact with water.

Q4: What if my channel has a different shape?
A: This calculator is specifically designed for rectangular channels. Other channel shapes (circular, trapezoidal, etc.) require different formulas.

Q5: Why is wetted area important in hydraulic calculations?
A: Wetted area is essential for calculating hydraulic radius, flow resistance, shear stress, and other parameters critical for channel design and flow analysis.