1. What is the Evaporation Rate Equation?

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

2. How Does the Calculator Work?

The calculator uses the evaporation rate equation:

Where:

• \( ER \) — Evaporation Rate (kg per hour)
• \( V \) — Wind Speed (meters per second)
• \( A \) — Surface Area (square meters)
• \( Xs \) — Saturation Humidity Ratio (kg/kg)
• \( X \) — Actual Humidity Ratio (kg/kg)

Explanation: The equation accounts for wind speed's effect on evaporation, surface area, and the humidity difference that drives the evaporation process.

3. Importance of Evaporation Rate Calculation

Details: Accurate evaporation rate estimation 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 square meters, and humidity ratios in kg/kg. Ensure Xs > X for valid evaporation calculation. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect evaporation rate?
A: Temperature, humidity, wind speed, surface area, and atmospheric pressure are key factors influencing evaporation rates.

Q2: How accurate is this equation?
A: This provides a good estimate for general applications but may need adjustment for specific conditions or highly accurate requirements.

Q3: What are typical evaporation rates?
A: Rates vary widely from 0.1-10 kg/m²/hour depending on environmental conditions and water temperature.

Q4: Can this be used for any liquid?
A: The equation is primarily designed for water. Other liquids require different coefficients based on their physical properties.

Q5: How does temperature affect evaporation?
A: Higher temperatures increase saturation humidity ratio (Xs), which typically increases the evaporation rate.