Runoff Coefficient Calculator- Estimate Water Runoff Easily

Runoff Coefficient Calculator

Calculate the runoff coefficient to estimate the amount of water runoff from a specific area.

Rainfall (mm)

Runoff (mm)

Result

What is Runoff Coefficient Calculator?

The Runoff Coefficient Calculator helps in estimating the fraction of rainfall that will appear as runoff from a specific area. It is an essential tool in hydrology for managing water resources effectively.

Example of Runoff Coefficient Calculator

Input: Rainfall = 100 mm, Runoff = 30 mm

Output: Runoff Coefficient = 0.3

Here are some typical values of runoff coefficients for different surfaces:

• Grassland: 0.1 - 0.3
• Forest: 0.1 - 0.25
• Agricultural land: 0.25 - 0.5
• Paved areas (asphalt): 0.7 - 0.9
• Concrete surfaces: 0.8 - 0.95

How Runoff Coefficient Calculator Works?

To calculate the runoff coefficient, divide the amount of runoff by the amount of rainfall. The formula is:

Runoff Coefficient (C) = Runoff (mm) / Rainfall (mm)

Frequently Asked Questions (FAQ)

Q: What factors influence the runoff coefficient?

A: Factors include land use, soil type, vegetation cover, and slope of the terrain.

Q: Why is the runoff coefficient important?

A: It helps in predicting water runoff, which is crucial for flood control, water resource management, and environmental protection.

Q: How does urbanization affect runoff coefficients?

A: Urbanization typically increases runoff coefficients due to the prevalence of impervious surfaces, which do not absorb water.

Q: Can I use this calculator for different types of surfaces?

A: Yes, the calculator can be applied to various surfaces, including agricultural land, urban areas, and forests.

Q: What is considered a good runoff coefficient?

A: A runoff coefficient of 0.1 to 0.3 is typically found in forested areas, while urban areas may have coefficients ranging from 0.5 to 0.9.

Q: How can I reduce runoff from my property?

A: You can implement green roofs, permeable pavements, and rain gardens to reduce runoff.

Ad Space Above the Calculator