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First Moment of Instantaneous Unit Hydrograph or IUH Formula

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First Moment of the IUH i.e. Instantaneous unit hydrograph. Check FAQs

M 1 = n \cdot K

M₁ - First Moment of the IUH?n - Constant n?K - Constant K?

First Moment of Instantaneous Unit Hydrograph or IUH Example

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Here is how the First Moment of Instantaneous Unit Hydrograph or IUH equation looks like with Values.

Here is how the First Moment of Instantaneous Unit Hydrograph or IUH equation looks like with Units.

Here is how the First Moment of Instantaneous Unit Hydrograph or IUH equation looks like.

12 = 3 \cdot 4

12 = 3 \cdot 4

12 = 3 \cdot 4

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First Moment of Instantaneous Unit Hydrograph or IUH Solution

Follow our step by step solution on how to calculate First Moment of Instantaneous Unit Hydrograph or IUH?

FIRST Step Consider the formula

M 1 = n \cdot K

Next Step Substitute values of Variables

∴

M 1 = 3 \cdot 4

Next Step Prepare to Evaluate

∴

M 1 = 3 \cdot 4

LAST Step Evaluate

∴

M 1 = 12

First Moment of Instantaneous Unit Hydrograph or IUH Formula Elements

Variables

First Moment of the IUH

First Moment of the IUH i.e. Instantaneous unit hydrograph.

Symbol: M₁

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find First Moment of the IUH

Constant n

Constant n is for the catchment to be determined by the effective rainfall of the catchment.

Symbol: n

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Constant n

Constant K

Constant K is for the catchment to be determined by flood hydrograph characteristics of the catchment.

Symbol: K

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Constant K

Other formulas in Determination of n and S of Nash's Model category

Go First Moment of DRH about Time Origin divided by Total Direct Runoff

M Q1 = (n \cdot K) + M I1

Go First Moment of ERH about Time Origin divided by Total Effective Rainfall

M I1 = M Q1 - (n \cdot K)

Go Second Moment of ERH about Time Origin divided by Total Excess Rainfall

M I2 = M Q2 - (n \cdot (n + 1) \cdot K^{2}) - (2 \cdot n \cdot K \cdot M I1)

Go Second Moment of DRH about Time Origin divided by Total Direct Runoff

M Q2 = (n \cdot (n + 1) \cdot K^{2}) + (2 \cdot n \cdot K \cdot M I1) + M I2

How to Evaluate First Moment of Instantaneous Unit Hydrograph or IUH?

First Moment of Instantaneous Unit Hydrograph or IUH evaluator uses First Moment of the IUH = Constant n*Constant K to evaluate the First Moment of the IUH, The First Moment of Instantaneous Unit Hydrograph or IUH formula is defined as the moment in the instantaneous unit hydrograph (IUH) of a watershed where the result of one instantaneous unit of rainfall excess is distributed uniformly over the watershed. First Moment of the IUH is denoted by M₁ symbol.

How to evaluate First Moment of Instantaneous Unit Hydrograph or IUH using this online evaluator? To use this online evaluator for First Moment of Instantaneous Unit Hydrograph or IUH, enter Constant n (n) & Constant K (K) and hit the calculate button.

FAQs on First Moment of Instantaneous Unit Hydrograph or IUH

What is the formula to find First Moment of Instantaneous Unit Hydrograph or IUH?

The formula of First Moment of Instantaneous Unit Hydrograph or IUH is expressed as First Moment of the IUH = Constant n*Constant K. Here is an example- 0.33 = 3*4.

How to calculate First Moment of Instantaneous Unit Hydrograph or IUH?

With Constant n (n) & Constant K (K) we can find First Moment of Instantaneous Unit Hydrograph or IUH using the formula - First Moment of the IUH = Constant n*Constant K.

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First Moment of Instantaneous Unit Hydrograph or IUH Formula

First Moment of Instantaneous Unit Hydrograph or IUH Example

First Moment of Instantaneous Unit Hydrograph or IUH Solution

First Moment of Instantaneous Unit Hydrograph or IUH Formula Elements

Other formulas in Determination of n and S of Nash's Model category

How to Evaluate First Moment of Instantaneous Unit Hydrograph or IUH?

FAQs on First Moment of Instantaneous Unit Hydrograph or IUH

Variable Name