Constant used in Rohwer's Formula given Evaporation Loss Per Day Calculator

✖Evaporation Loss per Day refers to the amount of water lost from a surface due to evaporation within a single day, typically measured in millimeters (mm).ⓘ Evaporation Loss per Day [E]			+10% -10%
✖Atmospheric pressure refers to the force exerted by the weight of the atmosphere on a surface, typically measured in pascals (Pa), millibars (mb), or inches of mercury (inHg).ⓘ Atmospheric Pressure [P_a]			+10% -10%
✖Mean Wind Velocity refers to the wind in kilometers per hour at a height of about 9 meters above the ground.ⓘ Mean Wind Velocity [u]			+10% -10%
✖The Maximum Vapour Pressure refers to the highest pressure exerted by a vapour in equilibrium with its liquid at a given temperature, often measured in cm Hg or kPa.ⓘ Maximum Vapour Pressure [V]			+10% -10%
✖The Actual vapour pressure refers to the pressure exerted by the water vapour present in the air, reflecting the current humidity and temperature, typically measured in cm Hg or kPa.ⓘ Actual Vapour Pressure [v]			+10% -10%

✖Rohwer's Formula Constant refers to an empirical coefficient used in Rohwer's equation to estimate evaporation rates, adjusting for local climatic conditions.ⓘ Constant used in Rohwer's Formula given Evaporation Loss Per Day [C']

⎘ Copy

👎

Formula

✖

Constant used in Rohwer's Formula given Evaporation Loss Per Day

Formula

C' = \frac{E}{(1.465 - (0.00732 \cdot P a)) \cdot (0.44 + (0.0732 \cdot u)) \cdot (V - v)}

Example

0.749829 = \frac{8.29 cm}{(1.465 - (0.00732 \cdot 74.83 cmHg)) \cdot (0.44 + (0.0732 \cdot 8 km/h)) \cdot (0.6 cmHg - 0.4 cmHg)}

Calculator

LaTeX

Reset

👍

Download Evaporation and Transpiration Formulas PDF PDF Image

Constant used in Rohwer's Formula given Evaporation Loss Per Day Solution

STEP 0: Pre-Calculation Summary

Formula Used

Rohwer's Formula Constant = Evaporation Loss per Day/((1.465-(0.00732*Atmospheric Pressure))*(0.44+(0.0732*Mean Wind Velocity))*(Maximum Vapour Pressure-Actual Vapour Pressure))
C' = E/((1.465-(0.00732*P_a))*(0.44+(0.0732*u))*(V-v))
This formula uses 6 Variables

Variables Used

Rohwer's Formula Constant - Rohwer's Formula Constant refers to an empirical coefficient used in Rohwer's equation to estimate evaporation rates, adjusting for local climatic conditions.
Evaporation Loss per Day - (Measured in Meter) - Evaporation Loss per Day refers to the amount of water lost from a surface due to evaporation within a single day, typically measured in millimeters (mm).
Atmospheric Pressure - (Measured in Centimeter Mercury (0 °C)) - Atmospheric pressure refers to the force exerted by the weight of the atmosphere on a surface, typically measured in pascals (Pa), millibars (mb), or inches of mercury (inHg).
Mean Wind Velocity - (Measured in Meter per Second) - Mean Wind Velocity refers to the wind in kilometers per hour at a height of about 9 meters above the ground.
Maximum Vapour Pressure - (Measured in Centimeter Mercury (0 °C)) - The Maximum Vapour Pressure refers to the highest pressure exerted by a vapour in equilibrium with its liquid at a given temperature, often measured in cm Hg or kPa.
Actual Vapour Pressure - (Measured in Centimeter Mercury (0 °C)) - The Actual vapour pressure refers to the pressure exerted by the water vapour present in the air, reflecting the current humidity and temperature, typically measured in cm Hg or kPa.

STEP 1: Convert Input(s) to Base Unit

Evaporation Loss per Day: 8.29 Centimeter --> 0.0829 Meter (Check conversion here)
Atmospheric Pressure: 74.83 Centimeter Mercury (0 °C) --> 74.83 Centimeter Mercury (0 °C) No Conversion Required
Mean Wind Velocity: 8 Kilometer per Hour --> 2.22222222222222 Meter per Second (Check conversion here)
Maximum Vapour Pressure: 0.6 Centimeter Mercury (0 °C) --> 0.6 Centimeter Mercury (0 °C) No Conversion Required
Actual Vapour Pressure: 0.4 Centimeter Mercury (0 °C) --> 0.4 Centimeter Mercury (0 °C) No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

C' = E/((1.465-(0.00732*P_a))*(0.44+(0.0732*u))*(V-v)) --> 0.0829/((1.465-(0.00732*74.83))*(0.44+(0.0732*2.22222222222222))*(0.6-0.4))

Evaluating ... ...

C' = 0.749829106258448

STEP 3: Convert Result to Output's Unit

0.749829106258448 --> No Conversion Required

FINAL ANSWER

0.749829106258448 ≈ 0.749829 <-- Rohwer's Formula Constant

(Calculation completed in 00.020 seconds)

You are here -

Home » Engineering » Civil » Environmental Engineering » Surface Water Hydrology » Evaporation and Transpiration » Constant used in Rohwer's Formula given Evaporation Loss Per Day

Credits

Created by Suraj Kumar

Birsa Institute of Technology (BIT), Sindri

Suraj Kumar has created this Calculator and 2100+ more calculators!

Verified by Ishita Goyal

Meerut Institute of Engineering and Technology (MIET), Meerut

Ishita Goyal has verified this Calculator and 2600+ more calculators!

< Evaporation and Transpiration Calculators

Monthly Mean Wind Velocity given Evaporation Loss Per Month

Go Mean Wind Velocity = ((Evaporation Loss per Month/(Meyer's Constant*(Maximum Vapour Pressure-Actual Vapour Pressure)))-1)*16

Maximum Vapour Pressure given Evaporation Loss Per Month

Go Maximum Vapour Pressure = Actual Vapour Pressure+(Evaporation Loss per Month/(Meyer's Constant*(1+(Mean Wind Velocity/16))))

Actual Vapour Pressure given Evaporation Loss Per Month

Go Actual Vapour Pressure = Maximum Vapour Pressure-(Evaporation Loss per Month/(Meyer's Constant*(1+(Mean Wind Velocity/16))))

Evaporation Loss Per Month

Go Evaporation Loss per Month = Meyer's Constant*(Maximum Vapour Pressure-Actual Vapour Pressure)*(1+(Mean Wind Velocity/16))

Constant used in Rohwer's Formula given Evaporation Loss Per Day Formula

What is Evaporation Loss ?

The loss of a stored volatile liquid component or mixture by evaporation; controlled by temperature, pressure, and the presence or absence of vapour-recovery systems.

How to Calculate Constant used in Rohwer's Formula given Evaporation Loss Per Day?

Constant used in Rohwer's Formula given Evaporation Loss Per Day calculator uses Rohwer's Formula Constant = Evaporation Loss per Day/((1.465-(0.00732*Atmospheric Pressure))*(0.44+(0.0732*Mean Wind Velocity))*(Maximum Vapour Pressure-Actual Vapour Pressure)) to calculate the Rohwer's Formula Constant, The Constant used in Rohwer's Formula given Evaporation Loss Per Day is defined as the value of rower's constant when we have prior information of other parameters used. Rohwer's Formula Constant is denoted by C' symbol.

How to calculate Constant used in Rohwer's Formula given Evaporation Loss Per Day using this online calculator? To use this online calculator for Constant used in Rohwer's Formula given Evaporation Loss Per Day, enter Evaporation Loss per Day (E), Atmospheric Pressure (P_a), Mean Wind Velocity (u), Maximum Vapour Pressure (V) & Actual Vapour Pressure (v) and hit the calculate button. Here is how the Constant used in Rohwer's Formula given Evaporation Loss Per Day calculation can be explained with given input values -> 0.742593 = 0.0829/((1.465-(0.00732*99764.8526))*(0.44+(0.0732*2.22222222222222))*(799.932-533.288)).

FAQ

What is Constant used in Rohwer's Formula given Evaporation Loss Per Day?

The Constant used in Rohwer's Formula given Evaporation Loss Per Day is defined as the value of rower's constant when we have prior information of other parameters used and is represented as C' = E/((1.465-(0.00732*P_a))*(0.44+(0.0732*u))*(V-v)) or Rohwer's Formula Constant = Evaporation Loss per Day/((1.465-(0.00732*Atmospheric Pressure))*(0.44+(0.0732*Mean Wind Velocity))*(Maximum Vapour Pressure-Actual Vapour Pressure)). Evaporation Loss per Day refers to the amount of water lost from a surface due to evaporation within a single day, typically measured in millimeters (mm), Atmospheric pressure refers to the force exerted by the weight of the atmosphere on a surface, typically measured in pascals (Pa), millibars (mb), or inches of mercury (inHg), Mean Wind Velocity refers to the wind in kilometers per hour at a height of about 9 meters above the ground, The Maximum Vapour Pressure refers to the highest pressure exerted by a vapour in equilibrium with its liquid at a given temperature, often measured in cm Hg or kPa & The Actual vapour pressure refers to the pressure exerted by the water vapour present in the air, reflecting the current humidity and temperature, typically measured in cm Hg or kPa.

How to calculate Constant used in Rohwer's Formula given Evaporation Loss Per Day?

The Constant used in Rohwer's Formula given Evaporation Loss Per Day is defined as the value of rower's constant when we have prior information of other parameters used is calculated using Rohwer's Formula Constant = Evaporation Loss per Day/((1.465-(0.00732*Atmospheric Pressure))*(0.44+(0.0732*Mean Wind Velocity))*(Maximum Vapour Pressure-Actual Vapour Pressure)). To calculate Constant used in Rohwer's Formula given Evaporation Loss Per Day, you need Evaporation Loss per Day (E), Atmospheric Pressure (P_a), Mean Wind Velocity (u), Maximum Vapour Pressure (V) & Actual Vapour Pressure (v). With our tool, you need to enter the respective value for Evaporation Loss per Day, Atmospheric Pressure, Mean Wind Velocity, Maximum 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 Rohwer's Formula Constant?

In this formula, Rohwer's Formula Constant uses Evaporation Loss per Day, Atmospheric Pressure, Mean Wind Velocity, Maximum Vapour Pressure & Actual Vapour Pressure. We can use 1 other way(s) to calculate the same, which is/are as follows -

Rohwer's Formula Constant = Evaporation Loss per Day/((1.465-(0.00732*Atmospheric Pressure))*(0.44+(0.0732*Mean Wind Velocity))*Change in Vapour Pressure)

Home

FREE PDFs

🔍 Search