1. What is the Width Calculation Formula?

The formula calculates the width of storm water drains based on the depth of the drain. This relationship is particularly useful for designing drainage systems that can handle up to 15 cubic meters per second (cumecs) of storm water flow.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( B_s \) — Width of Storm Water Drains (m)
• \( d_{swd} \) — Depth of Drains for Storm Water (m)

Explanation: The formula establishes a quadratic relationship between drain depth and width, with 0.5 serving as a scaling factor to determine appropriate width dimensions based on depth.

3. Importance of Drain Width Calculation

Details: Proper drain sizing is crucial for effective storm water management. Adequate width ensures the drainage system can handle peak flow rates during heavy rainfall, preventing flooding and water damage to infrastructure.

4. Using the Calculator

Tips: Enter the depth of the storm water drain in meters. The value must be greater than zero. The calculator will compute the corresponding width based on the established formula.

5. Frequently Asked Questions (FAQ)

Q1: What is the range of application for this formula?
A: This formula is specifically designed for storm water drains handling up to 15 cubic meters per second (cumecs) of flow.

Q2: Why is there a quadratic relationship between depth and width?
A: The quadratic relationship accounts for the increasing cross-sectional area needed to maintain proper flow characteristics as drain depth increases.

Q3: Are there other factors that affect drain width besides depth?
A: Yes, factors such as expected flow rate, slope, and material roughness also influence drain design, but this formula provides a standardized approach for typical storm water drainage scenarios.

Q4: Can this formula be used for drains larger than 15 cumecs capacity?
A: This formula is specifically calibrated for drains up to 15 cumecs. For larger capacity drains, different design formulas and considerations may apply.

Q5: How accurate is this calculation for real-world applications?
A: While this formula provides a good starting point, final drain design should consider local regulations, specific site conditions, and professional engineering judgment.