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Pan Evaporation Loss Formula:
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Pan Evaporation Loss during the month is a measurement that combines or integrates the effects of several climate elements. It represents the amount of water evaporated from a standard pan over a specific time period.
The calculator uses the Pan Evaporation Loss formula:
Where:
Explanation: This formula calculates the evaporation loss from a pan by dividing the volume of water evaporated by the product of reservoir area and pan coefficient.
Details: Pan evaporation measurements are crucial for water resource management, irrigation planning, and understanding the water balance in reservoirs and lakes. They help in estimating water losses due to evaporation in various hydrological applications.
Tips: Enter the volume of water lost in evaporation in cubic meters, average reservoir area in square meters, and the relevant pan coefficient. All values must be positive numbers greater than zero.
Q1: What is a pan coefficient?
A: A pan coefficient is the ratio of evaporation from a large body of water to that measured in an evaporation pan. It accounts for differences between pan evaporation and actual reservoir evaporation.
Q2: Why use pan evaporation measurements?
A: Pan evaporation provides a simple and cost-effective method to estimate evaporation rates from water bodies, which is essential for water resource management and agricultural planning.
Q3: What factors affect pan evaporation?
A: Temperature, humidity, wind speed, solar radiation, and atmospheric pressure all influence evaporation rates from pans and natural water bodies.
Q4: How often should pan evaporation be measured?
A: Daily measurements are common, but monthly totals are often used for water balance calculations and reservoir management purposes.
Q5: Are there different types of evaporation pans?
A: Yes, common types include Class A evaporation pans, sunken pans, and floating pans, each with different characteristics and appropriate pan coefficients.