Fetch Parameter in SMB Prediction Method Calculator

✖Fetch Length is the unobstructed distance that wind can travel over water in a constant direction.ⓘ Fetch Length [F_l]			+10% -10%
✖Wind Speed is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in temperature.ⓘ Wind Speed [U]			+10% -10%

✖Fetch Parameter is often associated with the concept of fetch, which is the unobstructed distance over which the wind blows across a body of water in a constant direction.ⓘ Fetch Parameter in SMB Prediction Method [φ]

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Formula

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Fetch Parameter in SMB Prediction Method

Formula

`"φ" = ("[g]"*"F"_{"l"})/"U"^2`

Example

`"1.225831"=("[g]"*"2m")/("4m/s")^2`

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Fetch Parameter in SMB Prediction Method Solution

STEP 0: Pre-Calculation Summary

Formula Used

Fetch Parameter = ([g]*Fetch Length)/Wind Speed^2
φ = ([g]*F_l)/U^2
This formula uses 1 Constants, 3 Variables

Constants Used

[g] - Gravitational acceleration on Earth Value Taken As 9.80665

Variables Used

Fetch Parameter - Fetch Parameter is often associated with the concept of fetch, which is the unobstructed distance over which the wind blows across a body of water in a constant direction.
Fetch Length - (Measured in Meter) - Fetch Length is the unobstructed distance that wind can travel over water in a constant direction.
Wind Speed - (Measured in Meter per Second) - Wind Speed is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in temperature.

STEP 1: Convert Input(s) to Base Unit

Fetch Length: 2 Meter --> 2 Meter No Conversion Required
Wind Speed: 4 Meter per Second --> 4 Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

φ = ([g]*F_l)/U^2 --> ([g]*2)/4^2

Evaluating ... ...

φ = 1.22583125

STEP 3: Convert Result to Output's Unit

1.22583125 --> No Conversion Required

FINAL ANSWER

1.22583125 ≈ 1.225831 <-- Fetch Parameter

(Calculation completed in 00.004 seconds)

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Created by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has created this Calculator and 2000+ more calculators!

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NSS College of Engineering (NSSCE), Palakkad

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< 9 SMB Prediction Method Calculators

Wind Speed given Duration of Wind in SMB Prediction Method

Go Wind Speed = ([g]*Duration of the Wind)/(6.5882*exp((0.0161*(ln(Fetch Parameter)^2)-0.3692*ln(Fetch Parameter)+2.2024)^0.5+0.8798*ln(Fetch Parameter)))

Duration of Wind in SMB Prediction Method

Go Duration of the Wind = Wind Speed*6.5882*exp((0.0161*(ln(Fetch Parameter)^2)-0.3692*ln(Fetch Parameter)+2.2024)^0.5+0.8798*ln(Fetch Parameter))/[g]

Wind Speed for Significant Wave Height in SMB Prediction Method

Go Wind Speed = sqrt([g]*Significant Wave Height for SMB Prediction Method/(0.283*tanh(0.0125*Fetch Parameter^0.42)))

Significant Wave Height in SMB Prediction Method

Go Significant Wave Height for SMB Prediction Method = (Wind Speed^2*0.283*tanh(0.0125*Fetch Parameter^0.42))/[g]

Wind Speed given Period of Significant Wave in SMB Prediction Method

Go Wind Speed = ([g]*Significant Wave Period)/(7.540*tanh(0.077*Fetch Parameter^0.25))

Period of Significant Wave in SMB Prediction Method

Go Significant Wave Period = (Wind Speed*7.540*tanh(0.077*Fetch Parameter^0.25))/[g]

Wind Speed given Fetch Parameter in SMB Prediction Method

Go Wind Speed = sqrt([g]*Fetch Length/Fetch Parameter)

Fetch Length given Fetch Parameter in SMB Prediction Method

Go Fetch Length = (Fetch Parameter*Wind Speed^2)/[g]

Fetch Parameter in SMB Prediction Method

Go Fetch Parameter = ([g]*Fetch Length)/Wind Speed^2

Fetch Parameter in SMB Prediction Method Formula

Fetch Parameter = ([g]*Fetch Length)/Wind Speed^2
φ = ([g]*F_l)/U^2

What is Significant Wave Height?

Significant wave height is defined as the average wave height, from trough to crest, of the highest one-third of the waves. Devised by oceanographer Walter Munk during World War II, the significant wave height provides an estimation of wave heights recorded by a trained observer from a fixed point at sea

How to Calculate Fetch Parameter in SMB Prediction Method?

Fetch Parameter in SMB Prediction Method calculator uses Fetch Parameter = ([g]*Fetch Length)/Wind Speed^2 to calculate the Fetch Parameter, The Fetch Parameter in SMB Prediction Method formula is defined as the wind speed parameter influencing the Sverdrup-Munk-Bretschneider (SMB) method, which is a semi-empirical method that has been used for the prediction of the significant wave height (H_s) in global watersheds. Fetch Parameter is denoted by φ symbol.

How to calculate Fetch Parameter in SMB Prediction Method using this online calculator? To use this online calculator for Fetch Parameter in SMB Prediction Method, enter Fetch Length (F_l) & Wind Speed (U) and hit the calculate button. Here is how the Fetch Parameter in SMB Prediction Method calculation can be explained with given input values -> 1.225831 = ([g]*2)/4^2.

FAQ

What is Fetch Parameter in SMB Prediction Method?

The Fetch Parameter in SMB Prediction Method formula is defined as the wind speed parameter influencing the Sverdrup-Munk-Bretschneider (SMB) method, which is a semi-empirical method that has been used for the prediction of the significant wave height (H_s) in global watersheds and is represented as φ = ([g]*F_l)/U^2 or Fetch Parameter = ([g]*Fetch Length)/Wind Speed^2. Fetch Length is the unobstructed distance that wind can travel over water in a constant direction & Wind Speed is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in temperature.

How to calculate Fetch Parameter in SMB Prediction Method?

The Fetch Parameter in SMB Prediction Method formula is defined as the wind speed parameter influencing the Sverdrup-Munk-Bretschneider (SMB) method, which is a semi-empirical method that has been used for the prediction of the significant wave height (H_s) in global watersheds is calculated using Fetch Parameter = ([g]*Fetch Length)/Wind Speed^2. To calculate Fetch Parameter in SMB Prediction Method, you need Fetch Length (F_l) & Wind Speed (U). With our tool, you need to enter the respective value for Fetch Length & Wind Speed and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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