1. What is the Evaporation Rate Formula?

The evaporation rate formula calculates the rate at which water evaporates from a surface based on wind speed, surface area, and humidity conditions. It's commonly used in environmental engineering, hydrology, and industrial applications.

2. How Does the Calculator Work?

The calculator uses the evaporation rate equation:

Where:

• \( V \) — Wind speed (meters per second)
• \( SA \) — Surface area (square meters)
• \( Xs \) — Saturation humidity ratio (kg/kg)
• \( X \) — Actual humidity ratio (kg/kg)

Explanation: The formula accounts for the combined effects of wind speed, surface area, and the humidity gradient between saturated and actual conditions.

3. Importance of Evaporation Rate Calculation

Details: Accurate evaporation rate calculation is crucial for water resource management, agricultural planning, industrial cooling systems, and environmental impact assessments.

4. Using the Calculator

Tips: Enter wind speed in m/s, surface area in m², and humidity ratios in kg/kg. Ensure all values are positive and that Xs is greater than X for meaningful results.

5. Frequently Asked Questions (FAQ)

Q1: What is the humidity ratio?
A: Humidity ratio represents the mass of water vapor per unit mass of dry air, typically expressed in kg/kg.

Q2: How does wind speed affect evaporation?
A: Higher wind speeds increase evaporation by removing moist air from the surface and replacing it with drier air.

Q3: What is saturation humidity ratio?
A: The maximum amount of water vapor air can hold at a given temperature and pressure.

Q4: When is this formula most accurate?
A: The formula works best for open water surfaces under moderate environmental conditions.

Q5: Can this be used for other liquids?
A: This specific formula is designed for water evaporation. Other liquids may require different coefficients.