1. What is Pan Evaporation Loss?

Pan Evaporation Loss is a measurement that combines or integrates the effects of several climate elements. It represents the amount of water evaporated from a standard pan during a specific period, typically measured in millimeters.

2. How Does the Calculator Work?

The calculator uses the Pan Evaporation Loss formula:

Where:

• \( E_{pm} \) — Pan Evaporation Loss (m)
• \( E_{lake} \) — Lake Evaporation (mm)
• \( n \) — Number of Days in a Month

Explanation: The formula calculates the total pan evaporation loss by multiplying the daily lake evaporation rate by the number of days and converting from millimeters to meters.

3. Importance of Pan Evaporation Calculation

Details: Pan evaporation measurement is crucial for water resource management, agricultural planning, and climate studies. It helps in understanding water balance and evaporation rates in different environmental conditions.

4. Using the Calculator

Tips: Enter lake evaporation in millimeters and the number of days in the month. All values must be valid (evaporation > 0, days between 1-31).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between pan evaporation and lake evaporation?
A: Pan evaporation is measured using a standard evaporation pan, while lake evaporation refers to actual evaporation from a lake surface. Pan evaporation is often used as an index for estimating lake evaporation.

Q2: Why is pan evaporation measurement important?
A: It provides valuable data for water resource management, irrigation scheduling, and climate change studies by quantifying evaporation rates.

Q3: What factors affect pan evaporation rates?
A: Temperature, humidity, wind speed, solar radiation, and atmospheric pressure all influence evaporation rates.

Q4: How often should pan evaporation be measured?
A: Typically measured daily, with readings taken at the same time each day for consistency.

Q5: Are there different types of evaporation pans?
A: Yes, the most common types are Class A evaporation pans and sunken pans, each with different characteristics and applications.