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Thornthwaite Formula Formula

GoEquation for Blaney Criddle Formula

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Potential Evapotranspiration in Crop Season is the potential evaporation from soils plus transpiration by plants. Check FAQs

E T = 1.6 \cdot L a \cdot {(\frac{10 \cdot T a}{I t})}^{a Th}

E_T - Potential Evapotranspiration in Crop Season?L_a - Adjustment Factor?T_a - Mean Air Temperature?I_t - Total Heat Index?a_Th - An Empirical Constant?

Thornthwaite Formula Example

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With units

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Here is how the Thornthwaite Formula equation looks like with Values.

Here is how the Thornthwaite Formula equation looks like with Units.

Here is how the Thornthwaite Formula equation looks like.

26.9843 = 1.6 \cdot 1.04 \cdot {(\frac{10 \cdot 20}{10})}^{0.93}

26.9843cm = 1.6 \cdot 1.04 \cdot {(\frac{10 \cdot 20}{10})}^{0.93}

26.9843 = 1.6 \cdot 1.04 \cdot {(\frac{10 \cdot 20}{10})}^{0.93}

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Thornthwaite Formula Solution

Follow our step by step solution on how to calculate Thornthwaite Formula?

FIRST Step Consider the formula

E T = 1.6 \cdot L a \cdot {(\frac{10 \cdot T a}{I t})}^{a Th}

Next Step Substitute values of Variables

∴

E T = 1.6 \cdot 1.04 \cdot {(\frac{10 \cdot 20}{10})}^{0.93}

Next Step Prepare to Evaluate

∴

E T = 1.6 \cdot 1.04 \cdot {(\frac{10 \cdot 20}{10})}^{0.93}

Next Step Evaluate

∴

E T = 0.269843038157774m

Next Step Convert to Output's Unit

∴

E T = 26.9843038157774cm

LAST Step Rounding Answer

∴

E T = 26.9843cm

Thornthwaite Formula Formula Elements

Variables

Potential Evapotranspiration in Crop Season

Potential Evapotranspiration in Crop Season is the potential evaporation from soils plus transpiration by plants.

Symbol: E_T

Measurement: LengthUnit: cm

Note: Value should be greater than 0.

Formulas to find Potential Evapotranspiration in Crop Season

Adjustment Factor

Adjustment Factor for the number of hours of daylight and days, in the month, related to the latitude of the place.

Symbol: L_a

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Adjustment Factor

Mean Air Temperature

Mean Air Temperature observed for incident solar radiation outside the atmosphere.

Symbol: T_a

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Mean Air Temperature

Total Heat Index

Total Heat Index Values of a total of twelve months.

Symbol: I_t

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Total Heat Index

An Empirical Constant

An Empirical Constant used in the Thornthwaite Formula depends on the total of 12 monthly values index.

Symbol: a_Th

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find An Empirical Constant

Other Formulas to find Potential Evapotranspiration in Crop Season

Go Equation for Blaney Criddle

E T = 2.54 \cdot K \cdot F

Other formulas in Evapotranspiration Equations category

Go Adjustment related to Latitude of Place given Potential Evapotranspiration

L a = \frac{E T}{1.6 \cdot {(\frac{10 \cdot T a}{I t})}^{a Th}}

Go Mean Monthly Air Temperature for Potential Evapotranspiration in Thornthwaite Equation

T a = {(\frac{E T}{1.6 \cdot L a})}^{\frac{1}{a Th}} \cdot (\frac{I t}{10})

Go Penman's Equation

PET = \frac{A \cdot H n + E a \cdot γ}{A + γ}

Go Net Radiation of Evaporable water given Daily Potential Evapotranspiration

H n = \frac{PET \cdot (A + γ) - (E a \cdot γ)}{A}

How to Evaluate Thornthwaite Formula?

Thornthwaite Formula evaluator uses Potential Evapotranspiration in Crop Season = 1.6*Adjustment Factor*((10*Mean Air Temperature)/Total Heat Index)^An Empirical Constant to evaluate the Potential Evapotranspiration in Crop Season, The Thornthwaite Formula formula is defined as the empirical method for estimating potential evapotranspiration (PET). The equation only requires the mean monthly air temperature and mean daily daylight hours for each month, which can be calculated from latitude. Potential Evapotranspiration in Crop Season is denoted by E_T symbol.

How to evaluate Thornthwaite Formula using this online evaluator? To use this online evaluator for Thornthwaite Formula, enter Adjustment Factor (L_a), Mean Air Temperature (T_a), Total Heat Index (I_t) & An Empirical Constant (a_Th) and hit the calculate button.

FAQs on Thornthwaite Formula

What is the formula to find Thornthwaite Formula?

The formula of Thornthwaite Formula is expressed as Potential Evapotranspiration in Crop Season = 1.6*Adjustment Factor*((10*Mean Air Temperature)/Total Heat Index)^An Empirical Constant. Here is an example- 2698.43 = 1.6*1.04*((10*20)/10)^0.93.

How to calculate Thornthwaite Formula?

With Adjustment Factor (L_a), Mean Air Temperature (T_a), Total Heat Index (I_t) & An Empirical Constant (a_Th) we can find Thornthwaite Formula using the formula - Potential Evapotranspiration in Crop Season = 1.6*Adjustment Factor*((10*Mean Air Temperature)/Total Heat Index)^An Empirical Constant.

What are the other ways to Calculate Potential Evapotranspiration in Crop Season?

Here are the different ways to Calculate Potential Evapotranspiration in Crop Season-

Potential Evapotranspiration in Crop Season=2.54*An Empirical Coefficient*Sum of Monthly Consumptive Use factors

Can the Thornthwaite Formula be negative?

No, the Thornthwaite Formula, measured in Length cannot be negative.

Which unit is used to measure Thornthwaite Formula?

Thornthwaite Formula is usually measured using the Centimeter[cm] for Length. Meter[cm], Millimeter[cm], Kilometer[cm] are the few other units in which Thornthwaite Formula can be measured.

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Thornthwaite Formula Formula

​GoEquation for Blaney Criddle Formula

Thornthwaite Formula Example

Thornthwaite Formula Solution

Thornthwaite Formula Formula Elements

Other Formulas to find Potential Evapotranspiration in Crop Season

Other formulas in Evapotranspiration Equations category

How to Evaluate Thornthwaite Formula?

FAQs on Thornthwaite Formula

Variable Name

GoEquation for Blaney Criddle Formula