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The Average Reservoir Area calculation determines the surface area of a reservoir based on water lost through evaporation, pan evaporation measurements, and the relevant pan coefficient. This is important for water resource management and reservoir operation planning.
The calculator uses the formula:
Where:
Explanation: The formula calculates the average surface area of the reservoir by dividing the volume of water lost to evaporation by the product of pan evaporation and the pan coefficient.
Details: Accurate reservoir area calculation is crucial for water balance studies, evaporation loss estimation, reservoir management, and planning water supply systems. It helps in understanding the relationship between evaporation and reservoir surface area.
Tips: Enter the volume of water lost in evaporation in cubic meters, pan evaporation loss in meters, and the relevant pan coefficient. All values must be positive numbers greater than zero.
Q1: What is pan evaporation?
A: Pan evaporation is a measurement that combines the effects of several climate elements (temperature, humidity, wind speed, solar radiation) on evaporation from an open water surface.
Q2: What is the pan coefficient?
A: The 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.
Q3: Why is this calculation important for reservoir management?
A: It helps estimate evaporation losses from reservoirs, which is crucial for water budgeting, supply planning, and understanding the water balance of reservoir systems.
Q4: What factors affect the pan coefficient?
A: The pan coefficient varies with pan type, location, season, humidity, wind speed, and the size of the water body being studied.
Q5: How often should these measurements be taken?
A: Measurements are typically taken daily or weekly, with monthly averages used for reservoir area calculations and water balance studies.