Dalton-Type Equation Calculator

✖The coefficient used in Dalton's Empirical equation.ⓘ Coefficient [K]			+10% -10%
✖The wind speed correction factor used in Dalton's Empirical Equation.ⓘ Wind Speed Correction Factor [f_u]			+10% -10%
✖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.ⓘ Saturation Vapour Pressure [e_s]			+10% -10%
✖Actual Vapour Pressure is the air in mm of mercury is the vapour pressure exerted by the water in the air.ⓘ Actual Vapour Pressure [e_a]			+10% -10%

✖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.ⓘ Dalton-Type Equation [E_lake]

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Dalton-Type Equation Solution

STEP 0: Pre-Calculation Summary

Formula Used

Lake Evaporation = Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure)
E_lake = K*f_u*(e_s-e_a)
This formula uses 5 Variables

Variables Used

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.
Coefficient - The coefficient used in Dalton's Empirical equation.
Wind Speed Correction Factor - The wind speed correction factor used in Dalton's Empirical Equation.
Saturation Vapour Pressure - (Measured in Millimeter Mercury (0 °C)) - 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.
Actual Vapour Pressure - (Measured in Millimeter Mercury (0 °C)) - Actual Vapour Pressure is the air in mm of mercury is the vapour pressure exerted by the water in the air.

STEP 1: Convert Input(s) to Base Unit

Coefficient: 0.5 --> No Conversion Required
Wind Speed Correction Factor: 1.7 --> No Conversion Required
Saturation Vapour Pressure: 17.54 Millimeter Mercury (0 °C) --> 17.54 Millimeter Mercury (0 °C) No Conversion Required
Actual Vapour Pressure: 3 Millimeter Mercury (0 °C) --> 3 Millimeter Mercury (0 °C) No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

E_lake = K*f_u*(e_s-e_a) --> 0.5*1.7*(17.54-3)

Evaluating ... ...

E_lake = 12.359

STEP 3: Convert Result to Output's Unit

12.359 --> No Conversion Required

FINAL ANSWER

12.359 <-- Lake Evaporation

(Calculation completed in 00.004 seconds)

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Created by Ayush Singh

Gautam Buddha University (GBU), Greater Noida

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< Evaporation Calculators

Rohwers formula (1931)

LaTeX Go 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)

Meyers formula (1915)

LaTeX Go Lake Evaporation = Coefficient Accounting for Other Factors*(Saturation Vapour Pressure-Actual Vapour Pressure)*(1+Monthly Mean Wind Velocity/16)

Dalton-Type Equation

LaTeX Go Lake Evaporation = Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure)

Dalton's Law of Evaporation

LaTeX Go Evaporation from Water Body = Proportionality Constant*(Saturation Vapour Pressure-Actual Vapour Pressure)

Dalton-Type Equation Formula

LaTeX Go

Lake Evaporation = Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure)
E_lake = K*f_u*(e_s-e_a)

What is Evaporation?

Evaporation is the process in which a liquid changes to the gaseous state as the free surface, below its boiling point, through the transfer of energy.

What is the need of Dalton's Equation?

A large number of empirical equations are available to estimate lake evaporation using commonly available meteorological data. Most formulae arc based on Dalton's Equation.

How to Calculate Dalton-Type Equation?

Dalton-Type Equation calculator uses Lake Evaporation = Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure) to calculate the Lake Evaporation, The Dalton-Type Equation formula is defined as the product of the wind speed correction factor and a coefficient to the difference between saturated vapour pressure and actual vapour pressure. Lake Evaporation is denoted by E_lake symbol.

How to calculate Dalton-Type Equation using this online calculator? To use this online calculator for Dalton-Type Equation, enter Coefficient (K), Wind Speed Correction Factor (f_u), Saturation Vapour Pressure (e_s) & Actual Vapour Pressure (e_a) and hit the calculate button. Here is how the Dalton-Type Equation calculation can be explained with given input values -> 12.359 = 0.5*1.7*(2338.46788-399.966).

FAQ

What is Dalton-Type Equation?

The Dalton-Type Equation formula is defined as the product of the wind speed correction factor and a coefficient to the difference between saturated vapour pressure and actual vapour pressure and is represented as E_lake = K*f_u*(e_s-e_a) or Lake Evaporation = Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure). The coefficient used in Dalton's Empirical equation, The wind speed correction factor used in Dalton's Empirical Equation, 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 & Actual Vapour Pressure is the air in mm of mercury is the vapour pressure exerted by the water in the air.

How to calculate Dalton-Type Equation?

The Dalton-Type Equation formula is defined as the product of the wind speed correction factor and a coefficient to the difference between saturated vapour pressure and actual vapour pressure is calculated using Lake Evaporation = Coefficient*Wind Speed Correction Factor*(Saturation Vapour Pressure-Actual Vapour Pressure). To calculate Dalton-Type Equation, you need Coefficient (K), Wind Speed Correction Factor (f_u), Saturation Vapour Pressure (e_s) & Actual Vapour Pressure (e_a). With our tool, you need to enter the respective value for Coefficient, Wind Speed Correction Factor, Saturation Vapour Pressure & Actual Vapour Pressure and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Lake Evaporation?

In this formula, Lake Evaporation uses Coefficient, Wind Speed Correction Factor, Saturation Vapour Pressure & Actual Vapour Pressure. We can use 2 other way(s) to calculate the same, which is/are as follows -

Lake Evaporation = Coefficient Accounting for Other Factors*(Saturation Vapour Pressure-Actual Vapour Pressure)*(1+Monthly Mean Wind Velocity/16)
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)

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