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Meyers formula (1915) Formula

GoRohwers formula (1931) Formula

GoDalton-Type Equation Formula

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Lake Evaporation is a sensitive indicator of the hydrological response to climate change. Variability in annual lake evaporation is assumed to be controlled by the surface solar radiation. Check FAQs

E lake = K m \cdot (e s - e a) \cdot (1 + \frac{u 9}{16})

E_lake - Lake Evaporation?K_m - Coefficient Accounting for Other Factors?e_s - Saturation Vapour Pressure?e_a - Actual Vapour Pressure?u₉ - Monthly Mean Wind Velocity?

Meyers formula (1915) Example

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Here is how the Meyers formula (1915) equation looks like with Values.

Here is how the Meyers formula (1915) equation looks like with Units.

Here is how the Meyers formula (1915) equation looks like.

12.399 = 0.36 \cdot (17.54 - 3) \cdot (1 + \frac{21.9}{16})

12.399 = 0.36 \cdot (17.54mmHg - 3mmHg) \cdot (1 + \frac{21.9km/h}{16})

12.399 = 0.36 \cdot (17.54 - 3) \cdot (1 + \frac{21.9}{16})

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Meyers formula (1915) Solution

Follow our step by step solution on how to calculate Meyers formula (1915)?

FIRST Step Consider the formula

E lake = K m \cdot (e s - e a) \cdot (1 + \frac{u 9}{16})

Next Step Substitute values of Variables

∴

E lake = 0.36 \cdot (17.54mmHg - 3mmHg) \cdot (1 + \frac{21.9km/h}{16})

Next Step Prepare to Evaluate

∴

E lake = 0.36 \cdot (17.54 - 3) \cdot (1 + \frac{21.9}{16})

Next Step Evaluate

∴

E lake = 12.398985

LAST Step Rounding Answer

∴

E lake = 12.399

Meyers formula (1915) Formula Elements

Variables

Lake Evaporation

Lake Evaporation is a sensitive indicator of the hydrological response to climate change. Variability in annual lake evaporation is assumed to be controlled by the surface solar radiation.

Symbol: E_lake

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Lake Evaporation

Coefficient Accounting for Other Factors

Coefficient accounting for other factors (0.36 for large deep water bodies, 0.5 for small shallow water bodies).

Symbol: K_m

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Coefficient Accounting for Other Factors

Saturation Vapour Pressure

Saturation Vapour Pressure at Water Surface (mm of mercury) is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases at a given temperature.

Symbol: e_s

Measurement: PressureUnit: mmHg

Note: Value can be positive or negative.

Formulas to find Saturation Vapour Pressure

Actual Vapour Pressure

Actual Vapour Pressure is the air in mm of mercury is the vapour pressure exerted by the water in the air.

Symbol: e_a

Measurement: PressureUnit: mmHg

Note: Value should be greater than 0.

Formulas to find Actual Vapour Pressure

Monthly Mean Wind Velocity

Monthly Mean Wind Velocity in km/hr is usually taken at about 9m above the ground.

Symbol: u₉

Measurement: SpeedUnit: km/h

Note: Value should be greater than 0.

Formulas to find Monthly Mean Wind Velocity

Other Formulas to find Lake Evaporation

Go Rohwers formula (1931)

E lake = 0.771 \cdot (1.465 - 0.00073 \cdot P a) \cdot (0.44 + 0.0733 \cdot u 0) \cdot (e s - e a)

Go Dalton-Type Equation

E lake = K \cdot f u \cdot (e s - e a)

Other formulas in Evaporation category

Go Dalton's Law of Evaporation

E = K o \cdot (e s - e a)

Go Vapour Pressure of Water at given Temperature for Evaporation in Water Bodies

e s = (\frac{E}{K o}) + e a

Go Vapour Pressure of Air using Dalton's Law

e a = e s - (\frac{E}{K o})

How to Evaluate Meyers formula (1915)?

Meyers formula (1915) evaluator uses Lake Evaporation = Coefficient Accounting for Other Factors*(Saturation Vapour Pressure-Actual Vapour Pressure)*(1+Monthly Mean Wind Velocity/16) to evaluate the Lake Evaporation, The Meyers formula (1915) formula is defined as empirical equations for estimating lake evaporation by the parameters vapour pressure of water surface and air and mean monthly wind velocity measured at a height of 9 m above free water surface. Lake Evaporation is denoted by E_lake symbol.

How to evaluate Meyers formula (1915) using this online evaluator? To use this online evaluator for Meyers formula (1915), enter Coefficient Accounting for Other Factors (K_m), Saturation Vapour Pressure (e_s), Actual Vapour Pressure (e_a) & Monthly Mean Wind Velocity (u₉) and hit the calculate button.

FAQs on Meyers formula (1915)

What is the formula to find Meyers formula (1915)?

The formula of Meyers formula (1915) is expressed as Lake Evaporation = Coefficient Accounting for Other Factors*(Saturation Vapour Pressure-Actual Vapour Pressure)*(1+Monthly Mean Wind Velocity/16). Here is an example- 12.39898 = 0.36*(2338.46788-399.966)*(1+6.08333333333333/16).

How to calculate Meyers formula (1915)?

With Coefficient Accounting for Other Factors (K_m), Saturation Vapour Pressure (e_s), Actual Vapour Pressure (e_a) & Monthly Mean Wind Velocity (u₉) we can find Meyers formula (1915) using the formula - Lake Evaporation = Coefficient Accounting for Other Factors*(Saturation Vapour Pressure-Actual Vapour Pressure)*(1+Monthly Mean Wind Velocity/16).

What are the other ways to Calculate Lake Evaporation?

Here are the different ways to Calculate Lake Evaporation-

Lake Evaporation=0.771*(1.465-0.00073*Atmospheric Pressure)*(0.44+0.0733*Mean Wind Velocity at Ground Level)*(Saturation Vapour Pressure-Actual Vapour Pressure)
Lake Evaporation=Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure)

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Meyers formula (1915) Formula

​GoRohwers formula (1931) Formula

​GoDalton-Type Equation Formula

Meyers formula (1915) Example

Meyers formula (1915) Solution

Meyers formula (1915) Formula Elements

Other Formulas to find Lake Evaporation

Other formulas in Evaporation category

How to Evaluate Meyers formula (1915)?

FAQs on Meyers formula (1915)

Variable Name

GoRohwers formula (1931) Formula

GoDalton-Type Equation Formula