1. What is the Water Cycle Rainfall Equation?

The water cycle rainfall equation describes the relationship between evaporation, runoff, and rainfall in the hydrological cycle. It provides a fundamental understanding of how water moves through the environment.

2. How Does the Calculator Work?

The calculator uses the water cycle equation:

Where:

• \( Evaporation \) — Amount of water evaporated (mm)
• \( Runoff \) — Amount of water that flows over land (mm)
• \( Rainfall \) — Resulting precipitation (mm)

Explanation: The equation shows that rainfall is what remains after accounting for water that runs off the land surface.

3. Importance of Rainfall Calculation

Details: Understanding rainfall patterns is crucial for water resource management, agriculture, flood prediction, and ecosystem studies.

4. Using the Calculator

Tips: Enter evaporation and runoff values in millimeters. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for the inputs?
A: The calculator uses millimeters (mm) for all measurements.

Q2: How accurate is this simple equation?
A: While simplified, it provides a good estimate for basic hydrological calculations.

Q3: What time period does this calculation represent?
A: The calculation applies to whatever time period your evaporation and runoff measurements represent (daily, monthly, etc.).

Q4: Does this account for other water cycle components?
A: No, this is a simplified version that focuses on these three key components.

Q5: Can I use this for large-scale watershed calculations?
A: For large-scale applications, more complex models that include additional factors are recommended.