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Net Radiation of Evaporable Water length per day influenced by the incoming solar radiation absorbed by the Earth's surface and the radiation reflected back. Check FAQs
Hn=Ha(1-r)(a+(bnN))-σTa4(0.56-0.092ea)(0.1+(0.9nN))
Hn - Net Radiation of Evaporable Water?Ha - Incident Solar Radiation Outside the Atmosphere?r - Reflection Coefficient?a - Constant depending on Latitude?b - A constant?n - Actual Duration of Bright Sunshine?N - Maximum Possible Hours of Bright Sunshine?σ - Stefan-Boltzmann constant?Ta - Mean Air Temperature?ea - Actual Vapour Pressure?

Equation for Net Radiation of Evaporable Water Example

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Here is how the Equation for Net Radiation of Evaporable Water equation looks like with Values.

Here is how the Equation for Net Radiation of Evaporable Water equation looks like with Units.

Here is how the Equation for Net Radiation of Evaporable Water equation looks like.

6.9764Edit=13.43Edit(1-0.25Edit)(0.2559Edit+(0.52Edit9Edit10.716Edit))-2E-9Edit20Edit4(0.56-0.0923Edit)(0.1+(0.99Edit10.716Edit))
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Equation for Net Radiation of Evaporable Water Solution

Follow our step by step solution on how to calculate Equation for Net Radiation of Evaporable Water?

FIRST Step Consider the formula
Hn=Ha(1-r)(a+(bnN))-σTa4(0.56-0.092ea)(0.1+(0.9nN))
Next Step Substitute values of Variables
Hn=13.43(1-0.25)(0.2559+(0.52910.716))-2E-9204(0.56-0.0923mmHg)(0.1+(0.9910.716))
Next Step Prepare to Evaluate
Hn=13.43(1-0.25)(0.2559+(0.52910.716))-2E-9204(0.56-0.0923)(0.1+(0.9910.716))
Next Step Evaluate
Hn=6.97640663617343
LAST Step Rounding Answer
Hn=6.9764

Equation for Net Radiation of Evaporable Water Formula Elements

Variables
Functions
Net Radiation of Evaporable Water
Net Radiation of Evaporable Water length per day influenced by the incoming solar radiation absorbed by the Earth's surface and the radiation reflected back.
Symbol: Hn
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Incident Solar Radiation Outside the Atmosphere
Incident Solar Radiation Outside the Atmosphere on a Horizontal Surface expressed in mm of Evaporable water per day.
Symbol: Ha
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Reflection Coefficient
Reflection Coefficient is a parameter that describes how much of a wave is reflected by an impedance discontinuity in the transmission medium.
Symbol: r
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Constant depending on Latitude
Constant depending on Latitude phi influencing the net radiation of evaporable water.
Symbol: a
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
A constant
A constant with an average value of 0.52.
Symbol: b
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Actual Duration of Bright Sunshine
Actual Duration of Bright Sunshine is a climatological indicator, measuring duration of sunshine in given period (usually, a day or a year) for a given location on Earth.
Symbol: n
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Maximum Possible Hours of Bright Sunshine
Maximum Possible Hours of Bright Sunshine is a climatological indicator, measuring the duration of sunshine in a given period.
Symbol: N
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Stefan-Boltzmann constant
Stefan-Boltzmann Constant is a physical constant involving black body radiation.
Symbol: σ
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Mean Air Temperature
Mean Air Temperature observed for incident solar radiation outside the atmosphere.
Symbol: Ta
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
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: ea
Measurement: PressureUnit: mmHg
Note: Value should be greater than 0.
sqrt
A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number.
Syntax: sqrt(Number)

Other Formulas to find Net Radiation of Evaporable Water

​Go Net Radiation of Evaporable water given Daily Potential Evapotranspiration
Hn=PET(A+γ)-(Eaγ)A

Other formulas in Evapotranspiration Equations category

​Go Equation for Blaney Criddle
ET=2.54KF
​Go Thornthwaite Formula
ET=1.6La(10TaIt)aTh

How to Evaluate Equation for Net Radiation of Evaporable Water?

Equation for Net Radiation of Evaporable Water evaluator uses Net Radiation of Evaporable Water = Incident Solar Radiation Outside the Atmosphere*(1-Reflection Coefficient)*(Constant depending on Latitude+(A constant*Actual Duration of Bright Sunshine/Maximum Possible Hours of Bright Sunshine))-Stefan-Boltzmann constant*Mean Air Temperature^4*(0.56-0.092*sqrt(Actual Vapour Pressure))*(0.1+(0.9*Actual Duration of Bright Sunshine/Maximum Possible Hours of Bright Sunshine)) to evaluate the Net Radiation of Evaporable Water, The Equation for Net Radiation of Evaporable Water formula is defined as the balance between incoming and outgoing energy at the top of the atmosphere. Net Radiation of Evaporable Water is denoted by Hn symbol.

How to evaluate Equation for Net Radiation of Evaporable Water using this online evaluator? To use this online evaluator for Equation for Net Radiation of Evaporable Water, enter Incident Solar Radiation Outside the Atmosphere (Ha), Reflection Coefficient (r), Constant depending on Latitude (a), A constant (b), Actual Duration of Bright Sunshine (n), Maximum Possible Hours of Bright Sunshine (N), Stefan-Boltzmann constant (σ), Mean Air Temperature (Ta) & Actual Vapour Pressure (ea) and hit the calculate button.

FAQs on Equation for Net Radiation of Evaporable Water

What is the formula to find Equation for Net Radiation of Evaporable Water?
The formula of Equation for Net Radiation of Evaporable Water is expressed as Net Radiation of Evaporable Water = Incident Solar Radiation Outside the Atmosphere*(1-Reflection Coefficient)*(Constant depending on Latitude+(A constant*Actual Duration of Bright Sunshine/Maximum Possible Hours of Bright Sunshine))-Stefan-Boltzmann constant*Mean Air Temperature^4*(0.56-0.092*sqrt(Actual Vapour Pressure))*(0.1+(0.9*Actual Duration of Bright Sunshine/Maximum Possible Hours of Bright Sunshine)). Here is an example- 6.976407 = 13.43*(1-0.25)*(0.2559+(0.52*9/10.716))-2.01E-09*20^4*(0.56-0.092*sqrt(399.966))*(0.1+(0.9*9/10.716)).
How to calculate Equation for Net Radiation of Evaporable Water?
With Incident Solar Radiation Outside the Atmosphere (Ha), Reflection Coefficient (r), Constant depending on Latitude (a), A constant (b), Actual Duration of Bright Sunshine (n), Maximum Possible Hours of Bright Sunshine (N), Stefan-Boltzmann constant (σ), Mean Air Temperature (Ta) & Actual Vapour Pressure (ea) we can find Equation for Net Radiation of Evaporable Water using the formula - Net Radiation of Evaporable Water = Incident Solar Radiation Outside the Atmosphere*(1-Reflection Coefficient)*(Constant depending on Latitude+(A constant*Actual Duration of Bright Sunshine/Maximum Possible Hours of Bright Sunshine))-Stefan-Boltzmann constant*Mean Air Temperature^4*(0.56-0.092*sqrt(Actual Vapour Pressure))*(0.1+(0.9*Actual Duration of Bright Sunshine/Maximum Possible Hours of Bright Sunshine)). This formula also uses Square Root (sqrt) function(s).
What are the other ways to Calculate Net Radiation of Evaporable Water?
Here are the different ways to Calculate Net Radiation of Evaporable Water-
  • Net Radiation of Evaporable Water=(Daily Potential Evapotranspiration*(Slope of Saturation Vapour Pressure+Psychrometric Constant)-(Parameter of Wind Velocity and Saturation Deficit*Psychrometric Constant))/Slope of Saturation Vapour PressureOpenImg
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