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Initial Abstraction given Ratio of Infiltration to Retention Formula

GoInitial Abstraction Formula

GoInitial Abstraction given Total Precipitation Formula

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Initial Abstraction is a parameter that accounts for all losses prior to runoff and consists mainly of interception, infiltration, evaporation, and surface depression storage. Check FAQs

I a = P T - (Q \cdot \frac{S}{F})

I_a - Initial Abstraction?P_T - Total Precipitation?Q - Direct Surface Runoff?S - Potential Maximum Retention?F - Cumulative Infiltration?

Initial Abstraction given Ratio of Infiltration to Retention Example

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Here is how the Initial Abstraction given Ratio of Infiltration to Retention equation looks like with Values.

Here is how the Initial Abstraction given Ratio of Infiltration to Retention equation looks like with Units.

Here is how the Initial Abstraction given Ratio of Infiltration to Retention equation looks like.

4.75 = 16 - (9 \cdot \frac{2.5}{2})

4.75m³ = 16m³ - (9m³ \cdot \frac{2.5m³}{2m³})

4.75 = 16 - (9 \cdot \frac{2.5}{2})

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Initial Abstraction given Ratio of Infiltration to Retention Solution

Follow our step by step solution on how to calculate Initial Abstraction given Ratio of Infiltration to Retention?

FIRST Step Consider the formula

I a = P T - (Q \cdot \frac{S}{F})

Next Step Substitute values of Variables

∴

I a = 16m³ - (9m³ \cdot \frac{2.5m³}{2m³})

Next Step Prepare to Evaluate

∴

I a = 16 - (9 \cdot \frac{2.5}{2})

LAST Step Evaluate

∴

I a = 4.75m³

Initial Abstraction given Ratio of Infiltration to Retention Formula Elements

Variables

Initial Abstraction

Initial Abstraction is a parameter that accounts for all losses prior to runoff and consists mainly of interception, infiltration, evaporation, and surface depression storage.

Symbol: I_a

Measurement: VolumeUnit: m³

Note: Value can be positive or negative.

Formulas to find Initial Abstraction

Total Precipitation

Total Precipitation is the sum of rainfall and the assumed water equivalent of snowfall for a given year.

Symbol: P_T

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Total Precipitation

Direct Surface Runoff

Direct Surface Runoff is the rain or meltwater that runs off during the rain or melt event as overland flow or in the vegetation cover above frozen soil.

Symbol: Q

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Direct Surface Runoff

Potential Maximum Retention

The potential maximum retention mainly represents infiltration occurring after runoff has started.

Symbol: S

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Potential Maximum Retention

Cumulative Infiltration

The cumulative infiltration excluding initial abstraction is total amount of water that soil strata are able to absorb from rainfall or irrigation in a given time.

Symbol: F

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Cumulative Infiltration

Other Formulas to find Initial Abstraction

Go Initial Abstraction

I a = P T - F - Q

Go Initial Abstraction given Total Precipitation

I a = P T - R max

Other formulas in Basic Theory category

Go Water Balance Equation for Rainfall

P T = I a + F + Q

Go Actual Infiltration

F = S \cdot (\frac{Q}{P T - I a})

Go Cumulative Infiltration given Total Precipitation

F = P T - I a - Q

Go Equation for Potential Maximum Retention

S = F \cdot (\frac{P T - I a}{Q})

How to Evaluate Initial Abstraction given Ratio of Infiltration to Retention?

Initial Abstraction given Ratio of Infiltration to Retention evaluator uses Initial Abstraction = Total Precipitation-(Direct Surface Runoff*Potential Maximum Retention/Cumulative Infiltration) to evaluate the Initial Abstraction, The Initial Abstraction given Ratio of Infiltration to Retention formula is defined as the runoff potential of a soil-cover complex during periods when the soil is not frozen. Initial Abstraction is denoted by I_a symbol.

How to evaluate Initial Abstraction given Ratio of Infiltration to Retention using this online evaluator? To use this online evaluator for Initial Abstraction given Ratio of Infiltration to Retention, enter Total Precipitation (P_T), Direct Surface Runoff (Q), Potential Maximum Retention (S) & Cumulative Infiltration (F) and hit the calculate button.

FAQs on Initial Abstraction given Ratio of Infiltration to Retention

What is the formula to find Initial Abstraction given Ratio of Infiltration to Retention?

The formula of Initial Abstraction given Ratio of Infiltration to Retention is expressed as Initial Abstraction = Total Precipitation-(Direct Surface Runoff*Potential Maximum Retention/Cumulative Infiltration). Here is an example- 4.75 = 16-(9*2.5/2).

How to calculate Initial Abstraction given Ratio of Infiltration to Retention?

With Total Precipitation (P_T), Direct Surface Runoff (Q), Potential Maximum Retention (S) & Cumulative Infiltration (F) we can find Initial Abstraction given Ratio of Infiltration to Retention using the formula - Initial Abstraction = Total Precipitation-(Direct Surface Runoff*Potential Maximum Retention/Cumulative Infiltration).

What are the other ways to Calculate Initial Abstraction?

Here are the different ways to Calculate Initial Abstraction-

Initial Abstraction=Total Precipitation-Cumulative Infiltration-Direct Surface Runoff
Initial Abstraction=Total Precipitation-Maximum Potential Runoff

Can the Initial Abstraction given Ratio of Infiltration to Retention be negative?

Yes, the Initial Abstraction given Ratio of Infiltration to Retention, measured in Volume can be negative.

Which unit is used to measure Initial Abstraction given Ratio of Infiltration to Retention?

Initial Abstraction given Ratio of Infiltration to Retention is usually measured using the Cubic Meter[m³] for Volume. Cubic Centimeter[m³], Cubic Millimeter[m³], Liter[m³] are the few other units in which Initial Abstraction given Ratio of Infiltration to Retention can be measured.

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Initial Abstraction given Ratio of Infiltration to Retention Formula

​GoInitial Abstraction Formula

​GoInitial Abstraction given Total Precipitation Formula

Initial Abstraction given Ratio of Infiltration to Retention Example

Initial Abstraction given Ratio of Infiltration to Retention Solution

Initial Abstraction given Ratio of Infiltration to Retention Formula Elements

Other Formulas to find Initial Abstraction

Other formulas in Basic Theory category

How to Evaluate Initial Abstraction given Ratio of Infiltration to Retention?

FAQs on Initial Abstraction given Ratio of Infiltration to Retention

Variable Name

GoInitial Abstraction Formula

GoInitial Abstraction given Total Precipitation Formula