First Moment of Instantaneous Unit Hydrograph or IUH Calculator

✖Constant n is for the catchment to be determined by the effective rainfall of the catchment.ⓘ Constant n [n]			+10% -10%
✖Constant K is for the catchment to be determined by flood hydrograph characteristics of the catchment.ⓘ Constant K [K]			+10% -10%

✖First Moment of the IUH i.e. Instantaneous unit hydrograph.ⓘ First Moment of Instantaneous Unit Hydrograph or IUH [M₁]

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First Moment of Instantaneous Unit Hydrograph or IUH Solution

STEP 0: Pre-Calculation Summary

Formula Used

First Moment of the IUH = Constant n*Constant K
M₁ = n*K
This formula uses 3 Variables

Variables Used

First Moment of the IUH - First Moment of the IUH i.e. Instantaneous unit hydrograph.
Constant n - Constant n is for the catchment to be determined by the effective rainfall of the catchment.
Constant K - Constant K is for the catchment to be determined by flood hydrograph characteristics of the catchment.

STEP 1: Convert Input(s) to Base Unit

Constant n: 3 --> No Conversion Required
Constant K: 4 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

M₁ = n*K --> 3*4

Evaluating ... ...

M₁ = 12

STEP 3: Convert Result to Output's Unit

12 --> No Conversion Required

FINAL ANSWER

12 <-- First Moment of the IUH

(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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< Determination of n and S of Nash's Model Calculators

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

LaTeX Go Second Moment of the ERH = Second Moment of the DRH-(Constant n*(Constant n+1)*Constant K^2)-(2*Constant n*Constant K*First Moment of the ERH)

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

LaTeX Go Second Moment of the DRH = (Constant n*(Constant n+1)*Constant K^2)+(2*Constant n*Constant K*First Moment of the ERH)+Second Moment of the ERH

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

LaTeX Go First Moment of the ERH = First Moment of the DRH-(Constant n*Constant K)

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

LaTeX Go First Moment of the DRH = (Constant n*Constant K)+First Moment of the ERH

First Moment of Instantaneous Unit Hydrograph or IUH Formula

LaTeX Go

First Moment of the IUH = Constant n*Constant K
M₁ = n*K

What is Hyetograph and Hydrograph?

A Hyetograph is a plot of the intensity of rainfall against the time interval it is usually represented by a bar chart.
A Hydrograph is a graphical plot of the discharge of a natural system for river versus time.

What is the use of Unit Hydrograph?

A Unit Hydrograph shows the temporal change in flow, or discharge, per unit of runoff. In other words, how the flow of a stream will be affected over time by the addition of one unit of runoff. The unit hydrograph is a useful tool in the process of predicting the impact of precipitation on streamflow.

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

First Moment of Instantaneous Unit Hydrograph or IUH calculator uses First Moment of the IUH = Constant n*Constant K to calculate 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 calculate First Moment of Instantaneous Unit Hydrograph or IUH using this online calculator? To use this online calculator for First Moment of Instantaneous Unit Hydrograph or IUH, enter Constant n (n) & Constant K (K) and hit the calculate button. Here is how the First Moment of Instantaneous Unit Hydrograph or IUH calculation can be explained with given input values -> 0.33 = 3*4.

FAQ

What is First Moment of Instantaneous Unit Hydrograph or 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 and is represented as M₁ = n*K or First Moment of the IUH = Constant n*Constant K. Constant n is for the catchment to be determined by the effective rainfall of the catchment & Constant K is for the catchment to be determined by flood hydrograph characteristics of the catchment.

How to calculate First Moment of Instantaneous Unit Hydrograph or 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 is calculated using First Moment of the IUH = Constant n*Constant K. To calculate First Moment of Instantaneous Unit Hydrograph or IUH, you need Constant n (n) & Constant K (K). With our tool, you need to enter the respective value for Constant n & Constant K 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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