Salinity at Moment of Slack Water Calculator

✖Salinity of Water is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity).ⓘ Salinity of Water [S]			+10% -10%
✖Fresh Water River Flow is the degree of mixing in an estuary and can be approximately related to the ratio between the volume of the tidal prism and the river flow.ⓘ Fresh Water River Flow [Q_r]			+10% -10%
✖Coordinate along the Channel describes how properties like velocity, pressure, and temperature vary along the length of the channel.ⓘ Coordinate along the Channel [x]			+10% -10%

✖Salinity at the Moment of Slack Water is a measure of salinity at the period at the turn of the tide when there is little or no horizontal motion of tidal water.ⓘ Salinity at Moment of Slack Water [Ss]

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Formula

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Salinity at Moment of Slack Water

Formula

`"Ss" = "S"*exp(-(18*10^-6)*"Q"_{"r"}*"x"^2-(0.045*"Q"_{"r"}^0.5))`

Example

`"0.029366"="33.33mg/L"*exp(-(18*10^-6)*"5m³/s"*("17m")^2-(0.045*("5m³/s")^0.5))`

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Salinity at Moment of Slack Water Solution

STEP 0: Pre-Calculation Summary

Formula Used

Salinity at the Moment of Slack Water = Salinity of Water*exp(-(18*10^-6)*Fresh Water River Flow*Coordinate along the Channel^2-(0.045*Fresh Water River Flow^0.5))
Ss = S*exp(-(18*10^-6)*Q_r*x^2-(0.045*Q_r^0.5))
This formula uses 1 Functions, 4 Variables

Functions Used

exp - n an exponential function, the value of the function changes by a constant factor for every unit change in the independent variable., exp(Number)

Variables Used

Salinity at the Moment of Slack Water - Salinity at the Moment of Slack Water is a measure of salinity at the period at the turn of the tide when there is little or no horizontal motion of tidal water.
Salinity of Water - (Measured in Kilogram per Cubic Meter) - Salinity of Water is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity).
Fresh Water River Flow - (Measured in Cubic Meter per Second) - Fresh Water River Flow is the degree of mixing in an estuary and can be approximately related to the ratio between the volume of the tidal prism and the river flow.
Coordinate along the Channel - (Measured in Meter) - Coordinate along the Channel describes how properties like velocity, pressure, and temperature vary along the length of the channel.

STEP 1: Convert Input(s) to Base Unit

Salinity of Water: 33.33 Milligram per Liter --> 0.03333 Kilogram per Cubic Meter (Check conversion here)
Fresh Water River Flow: 5 Cubic Meter per Second --> 5 Cubic Meter per Second No Conversion Required
Coordinate along the Channel: 17 Meter --> 17 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Ss = S*exp(-(18*10^-6)*Q_r*x^2-(0.045*Q_r^0.5)) --> 0.03333*exp(-(18*10^-6)*5*17^2-(0.045*5^0.5))

Evaluating ... ...

Ss = 0.0293656267837522

STEP 3: Convert Result to Output's Unit

0.0293656267837522 --> No Conversion Required

FINAL ANSWER

0.0293656267837522 ≈ 0.029366 <-- Salinity at the Moment of Slack Water

(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!

Verified by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has verified this Calculator and 1700+ more calculators!

< 19 Salinity Variations with Tide Calculators

Salinity at Moment of Slack Water

Go Salinity at the Moment of Slack Water = Salinity of Water*exp(-(18*10^-6)*Fresh Water River Flow*Coordinate along the Channel^2-(0.045*Fresh Water River Flow^0.5))

Apparent Dispersion Coefficient which includes all Mixing Effects

Go Apparent Dispersion Coefficient = (Diffusion Coefficient at x=0*Distance outside the Estuary)/(Coordinate along the Channel+Distance outside the Estuary)

Coordinate along Channel given Apparent Dispersion Coefficient

Go Coordinate along the Channel = (Diffusion Coefficient at x=0*Distance outside the Estuary/Apparent Dispersion Coefficient)-Distance outside the Estuary

Diffusion Coefficient

Go Diffusion Coefficient at x=0 = Apparent Dispersion Coefficient*(Coordinate along the Channel+Distance outside the Estuary)/Distance outside the Estuary

Froude Number given Dimensionless Estuary number

Go Froude Number = sqrt((Estuary Number*Fresh Water River Flow*Tidal Period)/Volume of Tidal Prism)

Fresh Water River Flow given Dimensionless Estuary number

Go Fresh Water River Flow = (Volume of Tidal Prism*Froude Number^2)/(Estuary Number*Tidal Period)

Tide Period given Dimensionless Estuary number

Go Tidal Period = (Volume of Tidal Prism*Froude Number^2)/(Estuary Number*Fresh Water River Flow)

Dimensionless Estuary number

Go Estuary Number = (Volume of Tidal Prism*Froude Number^2)/(Fresh Water River Flow*Tidal Period)

Volume of tidal prism given dimensionless estuary number

Go Volume of Tidal Prism = (Estuary Number*Fresh Water River Flow*Tidal Period)/Froude Number^2

Fresh Water River Flow given Mixing Parameter

Go Fresh Water River Flow = (Mixing Parameter*Volume of Tidal Prism)/Tidal Period

Volume of tidal prism given mixing parameter

Go Volume of Tidal Prism = (Fresh Water River Flow*Tidal Period)/Mixing Parameter

Tidal Period given Mixing Parameter

Go Tidal Period = (Mixing Parameter*Volume of Tidal Prism)/Fresh Water River Flow

Mixing Parameter

Go Mixing Parameter = (Fresh Water River Flow*Tidal Period)/Volume of Tidal Prism

Froude Number based upon maximum flood current velocity at estuary mouth

Go Froude Number = sqrt(Estuary Number*Mixing Parameter)

Rate of Potential Energy Gain given Dimensionless Stratification Number

Go Rate of Potential Energy Gain = Rate of Energy Dissipation/Stratification Number

Rate of Energy Dissipation given Dimensionless Stratification Number

Go Rate of Energy Dissipation = Stratification Number*Rate of Potential Energy Gain

Dimensionless Stratification Number

Go Stratification Number = Rate of Energy Dissipation/Rate of Potential Energy Gain

Estuary Number given Froude Number and Mixing Parameter

Go Estuary Number = Froude Number^2/Mixing Parameter

Mixing Parameter given Dimensionless Estuary number

Go Mixing Parameter = Froude Number^2/Estuary Number

Salinity at Moment of Slack Water Formula

What does Slack mean for Tides?

Slack water, which used to be known as 'The stand of the tide', is a short period in a body of tidal water either side of high water or low water essentially when the water is completely unstressed, and therefore with no rise or fall of the tide and no movement either way in the tidal stream.

How to Calculate Salinity at Moment of Slack Water?

Salinity at Moment of Slack Water calculator uses Salinity at the Moment of Slack Water = Salinity of Water*exp(-(18*10^-6)*Fresh Water River Flow*Coordinate along the Channel^2-(0.045*Fresh Water River Flow^0.5)) to calculate the Salinity at the Moment of Slack Water, The Salinity at Moment of Slack Water formula is defined as the salinity at a short period in a body of tidal water when the water is completely unstressed, and there is no movement either way in the tidal stream, and which occurs before the direction of the tidal stream reverses. Salinity at the Moment of Slack Water is denoted by Ss symbol.

How to calculate Salinity at Moment of Slack Water using this online calculator? To use this online calculator for Salinity at Moment of Slack Water, enter Salinity of Water (S), Fresh Water River Flow (Q_r) & Coordinate along the Channel (x) and hit the calculate button. Here is how the Salinity at Moment of Slack Water calculation can be explained with given input values -> 0.029366 = 0.03333*exp(-(18*10^-6)*5*17^2-(0.045*5^0.5)).

FAQ

What is Salinity at Moment of Slack Water?

The Salinity at Moment of Slack Water formula is defined as the salinity at a short period in a body of tidal water when the water is completely unstressed, and there is no movement either way in the tidal stream, and which occurs before the direction of the tidal stream reverses and is represented as Ss = S*exp(-(18*10^-6)*Q_r*x^2-(0.045*Q_r^0.5)) or Salinity at the Moment of Slack Water = Salinity of Water*exp(-(18*10^-6)*Fresh Water River Flow*Coordinate along the Channel^2-(0.045*Fresh Water River Flow^0.5)). Salinity of Water is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity), Fresh Water River Flow is the degree of mixing in an estuary and can be approximately related to the ratio between the volume of the tidal prism and the river flow & Coordinate along the Channel describes how properties like velocity, pressure, and temperature vary along the length of the channel.

How to calculate Salinity at Moment of Slack Water?

The Salinity at Moment of Slack Water formula is defined as the salinity at a short period in a body of tidal water when the water is completely unstressed, and there is no movement either way in the tidal stream, and which occurs before the direction of the tidal stream reverses is calculated using Salinity at the Moment of Slack Water = Salinity of Water*exp(-(18*10^-6)*Fresh Water River Flow*Coordinate along the Channel^2-(0.045*Fresh Water River Flow^0.5)). To calculate Salinity at Moment of Slack Water, you need Salinity of Water (S), Fresh Water River Flow (Q_r) & Coordinate along the Channel (x). With our tool, you need to enter the respective value for Salinity of Water, Fresh Water River Flow & Coordinate along the Channel 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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