Sheet Flow Calculator

Calculate Sheet Flow Rate





Formula

The formula to calculate sheet flow rate is:

\[ \text{Q} = \left( \frac{1.49}{\text{n}} \right) \times \text{L}^{0.6} \times \text{S}^{0.3} \]

Where:

What is Sheet Flow?

Sheet flow is the overland flow of water that occurs when excess stormwater spreads out over the ground surface in a thin, even layer. This type of flow is common in the early stages of runoff and occurs before the water collects into a defined channel. Understanding sheet flow is important for designing effective drainage systems and managing stormwater runoff in urban and rural areas.

Example Calculation

Let's assume the following values:

Using the formula:

\[ \text{Q} = \left( \frac{1.49}{0.015} \right) \times 100^{0.6} \times 0.02^{0.3} = 99.33 \times 6.31 \times 0.271 = 486.86 \]

The sheet flow rate is 486.86 cubic feet per second.