Adjustment Related To Latitude Of Place Given Potential Evapotranspiration Calculator

Formula Used:

\[ \text{Adjustment Factor} = \frac{\text{Potential Evapotranspiration in Crop Season}}{1.6 \times \left( \frac{10 \times \text{Mean Air Temperature}}{\text{Total Heat Index}} \right)^{\text{An Empirical Constant}}} \]

Potential Evapotranspiration in Crop Season:

Centimeter

Mean Air Temperature:

°C

Total Heat Index:

An Empirical Constant:

Adjustment Factor:

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1. What is the Adjustment Factor Formula?

The Adjustment Factor formula calculates the adjustment for the number of hours of daylight and days in the month, related to the latitude of the place. It is derived from the Thornthwaite formula and considers potential evapotranspiration, mean air temperature, total heat index, and an empirical constant.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

Potential Evapotranspiration in Crop Season — Measured in Centimeter
Mean Air Temperature — Observed for incident solar radiation outside the atmosphere
Total Heat Index — Total Heat Index Values of a total of twelve months
An Empirical Constant — Used in the Thornthwaite Formula depends on the total of 12 monthly values index

Explanation: The formula accounts for the relationship between evapotranspiration, temperature, and heat index, with an empirical constant to adjust for specific conditions.

3. Importance of Adjustment Factor Calculation

Details: Accurate adjustment factor calculation is crucial for agricultural planning, irrigation management, and climate studies. It helps in understanding water requirements and optimizing crop growth conditions.

4. Using the Calculator

Tips: Enter potential evapotranspiration in centimeters, mean air temperature in °C, total heat index, and the empirical constant. All values must be valid and greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is potential evapotranspiration?
A: Potential evapotranspiration is the amount of evaporation that would occur if a sufficient water source were available. It includes evaporation from soil and transpiration from plants.

Q2: How is mean air temperature measured?
A: Mean air temperature is typically measured as the average of daily maximum and minimum temperatures over a specific period, usually a month.

Q3: What is the total heat index?
A: The total heat index is the sum of monthly heat index values over twelve months, used in climate and agricultural studies.

Q4: How is the empirical constant determined?
A: The empirical constant is derived from historical data and varies depending on the location and specific conditions. It is typically between 0 and 1.

Q5: What are typical values for the adjustment factor?
A: The adjustment factor typically ranges from 0.5 to 1.5, depending on latitude, season, and climatic conditions.