✖Potential Maximum Retention (Curve Number) depends upon the soil vegetation land use complex of the catchment and also upon the antecedent soil moisture condition.ⓘ Potential Maximum Retention [S_CN]

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Formula

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Potential Maximum Retention

Formula

`"S"_{"CN"} = (25400/"CN")-254`

Example

`"1862.667mm"=(25400/"12")-254`

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Potential Maximum Retention Solution

STEP 0: Pre-Calculation Summary

Formula Used

Potential Maximum Retention (Curve Number) = (25400/Curve Number)-254
S_CN = (25400/CN)-254
This formula uses 2 Variables

Variables Used

Potential Maximum Retention (Curve Number) - (Measured in Millimeter) - Potential Maximum Retention (Curve Number) depends upon the soil vegetation land use complex of the catchment and also upon the antecedent soil moisture condition.
Curve Number - Curve Number is based on the area's hydrologic soil group, land use , treatment and hydrologic condition.

STEP 1: Convert Input(s) to Base Unit

Curve Number: 12 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

S_CN = (25400/CN)-254 --> (25400/12)-254

Evaluating ... ...

S_CN = 1862.66666666667

STEP 3: Convert Result to Output's Unit

1.86266666666667 Meter -->1862.66666666667 Millimeter (Check conversion here)

FINAL ANSWER

1862.66666666667 ≈ 1862.667 Millimeter <-- Potential Maximum Retention (Curve Number)

(Calculation completed in 00.004 seconds)

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Home » Engineering » Civil » Engineering Hydrology » Runoff » Runoff Volume » SCS-CN Method of Runoff Volume » Curve Number (CN) » Potential Maximum Retention

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< 5 Curve Number (CN) Calculators

Curve Number for Antecedent Moisture Condition One

Go Curve Number = Runoff Curve Number/(2.281-0.01281*Runoff Curve Number)

Curve Number for Antecedent Moisture Condition-III

Go Curve Number = Runoff Curve Number/(0.427+0.00573*Runoff Curve Number)

Potential Maximum Retention given Curve Number

Go Potential Maximum Retention (Curve Number) = 254*(100/Curve Number-1)

Potential Maximum Retention

Go Potential Maximum Retention (Curve Number) = (25400/Curve Number)-254

Curve Number

Go Curve Number = 25400/(Potential Maximum Retention (Curve Number)+254)

Potential Maximum Retention Formula

Potential Maximum Retention (Curve Number) = (25400/Curve Number)-254
S_CN = (25400/CN)-254

What is Runoff Curve Number?

The Runoff curve number is an empirical parameter used in hydrology for predicting direct runoff or infiltration from rainfall excess. The curve number is based on the area's hydrologic soil group, land use, treatment and hydrologic condition.

What is Curve Number and on what factors it depends?

The Curve Number (CN) is a dimensionless parameter related to the potential maximum retention expressed in millimeters. It ranges from 0-100. A CN value of 100 represents a condition of zero potential retention and CN= 0 represents an infinitely abstracting catchment with S= ∞.
The Curve Number CN depends upon the following listed below
1. Soil Type
2. Land Use/Cover
3. Antecedent moisture condition

How to Calculate Potential Maximum Retention?

Potential Maximum Retention calculator uses Potential Maximum Retention (Curve Number) = (25400/Curve Number)-254 to calculate the Potential Maximum Retention (Curve Number), The Potential Maximum Retention formula is defined as the ratio of the constant to the curve number which is a dimensionless parameter. Potential Maximum Retention (Curve Number) is denoted by S_CN symbol.

How to calculate Potential Maximum Retention using this online calculator? To use this online calculator for Potential Maximum Retention, enter Curve Number (CN) and hit the calculate button. Here is how the Potential Maximum Retention calculation can be explained with given input values -> 1.9E+6 = (25400/12)-254.

FAQ

What is Potential Maximum Retention?

The Potential Maximum Retention formula is defined as the ratio of the constant to the curve number which is a dimensionless parameter and is represented as S_CN = (25400/CN)-254 or Potential Maximum Retention (Curve Number) = (25400/Curve Number)-254. Curve Number is based on the area's hydrologic soil group, land use , treatment and hydrologic condition.

How to calculate Potential Maximum Retention?

The Potential Maximum Retention formula is defined as the ratio of the constant to the curve number which is a dimensionless parameter is calculated using Potential Maximum Retention (Curve Number) = (25400/Curve Number)-254. To calculate Potential Maximum Retention, you need Curve Number (CN). With our tool, you need to enter the respective value for Curve Number 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 Potential Maximum Retention (Curve Number)?

In this formula, Potential Maximum Retention (Curve Number) uses Curve Number. We can use 1 other way(s) to calculate the same, which is/are as follows -

Potential Maximum Retention (Curve Number) = 254*(100/Curve Number-1)

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