Regional Constant given Peak Discharge Solution

STEP 0: Pre-Calculation Summary
Formula Used
Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area
Cr = Qp*tp/2.78*Acatchment
This formula uses 4 Variables
Variables Used
Regional Constant - Regional Constant representing watershed slope and storage effect.
Peak Discharge - (Measured in Cubic Meter per Second) - Peak Discharge is the maximum volume flow rate passing a particular location during an event.
Basin Lag - (Measured in Hour) - Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.
Catchment Area - (Measured in Square Meter) - Catchment Area is an area of land where all water flows to a single stream, river, lake or even ocean.
STEP 1: Convert Input(s) to Base Unit
Peak Discharge: 0.891 Cubic Meter per Second --> 0.891 Cubic Meter per Second No Conversion Required
Basin Lag: 6 Hour --> 6 Hour No Conversion Required
Catchment Area: 2 Square Meter --> 2 Square Meter No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Cr = Qp*tp/2.78*Acatchment --> 0.891*6/2.78*2
Evaluating ... ...
Cr = 3.84604316546763
STEP 3: Convert Result to Output's Unit
3.84604316546763 --> No Conversion Required
FINAL ANSWER
3.84604316546763 3.846043 <-- Regional Constant
(Calculation completed in 00.004 seconds)

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25 Synder's Synthetic- Unit Hydrograph Calculators

Distance along Main Water Course from Gauging Station to Watershed
Go Distance along Main Water Course = (Basin Lag/Basin Constant/(Length of Basin/sqrt(Basin Slope))^Basin Constant 'n')^1/Basin Constant 'n'
Basin Length Measured along Water Course given Modified Equation for Basin Lag
Go Basin Length = (Basin Lag/Basin Constant)^(1/Basin Constant 'n')*(sqrt(Basin Slope)/Distance along Main Water Course)
Modified Equation for Basin Lag
Go Basin Lag = Basin Constant*(Length of Basin*Distance along Main Water Course/sqrt(Basin Slope))^Basin Constant 'n'
Basin Slope given Basin Lag
Go Basin Slope = ((Basin Length*Distance along Main Water Course)/((Basin Lag/Basin Constant)^(1/Basin Constant 'n')))^2
Basin Lag given Modified Basin Lag for Effective Duration
Go Basin Lag = (4*Modified Basin Lag+Standard Duration of Effective Rainfall-Non-standard rainfall duration)/4
Standard Duration of Effective Rainfall given Modified Basin Lag
Go Standard Duration of Effective Rainfall = Non-standard rainfall duration-4*(Modified Basin Lag-Basin Lag)
Modified Equation for Basin Lag for Effective Duration
Go Modified Basin Lag = Basin Lag+(Non-standard rainfall duration-Standard Duration of Effective Rainfall)/4
Equation for Catchment Parameter
Go Catchment Parameter = Length of Basin*Watershed Length/sqrt(Basin Slope)
Distance along Main Water Course from Gauging Station given Basin Lag
Go Distance along Main Water Course = ((Basin Lag/Regional Constant)^(1/0.3))*(1/Basin Length)
Regional Constant given Peak Discharge for Nonstandard Effective Rainfall
Go Regional Constant (Snyder) = Peak Discharge*Modified Basin Lag/(2.78*Area of Catchment)
Basin Length Measured along Water Course given Basin Lag
Go Basin Length = (Basin Lag/Regional Constant)^1/0.3*(1/Distance along Main Water Course)
Peak Discharge for Nonstandard Effective Rainfall
Go Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Modified Basin Lag
Regional Constant representing Watershed Slope and Storage Effects
Go Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3
Snyder's Equation
Go Basin Lag = Regional Constant*(Length of Basin*Distance along Main Water Course)^0.3
Catchment Area given Peak Discharge for Nonstandard Effective Rainfall
Go Area of Catchment = Peak Discharge*Modified Basin Lag/(2.78*Regional Constant)
Catchment Area given Peak Discharge of Unit Hydrograph
Go Area of Catchment = Peak Discharge*Basin Lag/(2.78*Regional Constant (Snyder))
Modified Basin Lag given Peak Discharge for Nonstandard Effective Rainfall
Go Modified Basin Lag = 2.78*Regional Constant*Area of Catchment/Peak Discharge
Snyder's Equation for Peak Discharge
Go Peak Discharge = 2.78*Regional Constant (Snyder)*Area of Catchment/Basin Lag
Basin Lag given Peak Discharge
Go Basin Lag = 2.78*Regional Constant (Snyder)*Area of Catchment/Peak Discharge
Regional Constant given Peak Discharge
Go Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area
Basin Lag given Modified Basin Lag
Go Basin Lag = (Modified Basin Lag-(Non-standard rainfall duration/4))/(21/22)
Non-Standard Rainfall Duration given Modified Basin Lag
Go Non-standard rainfall duration = (Modified Basin Lag-(21/22)*Basin Lag)*4
Modified Basin Lag for Effective Duration
Go Modified Basin Lag = (21*Basin Lag/22)+(Non-standard rainfall duration/4)
Snyder's Equation for Standard Duration of Effective Rainfall
Go Standard Duration of Effective Rainfall = Basin Lag/5.5
Basin Lag given Standard Duration of Effective Rainfall
Go Basin Lag = 5.5*Standard Duration of Effective Rainfall

Regional Constant given Peak Discharge Formula

Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area
Cr = Qp*tp/2.78*Acatchment

What is the Catchment Area of a river?

A water catchment (commonly referred to as a “watershed”) is an area of land where all water flows to a single stream, river, lake or even ocean. Natural boundaries of water catchments can be very small for a single creek or stream or quite large—the Colorado River basin for example.

What is Lag time in hydrology and Baseflow?

The Lag time is the delay between the maximum rainfall amount and the peak discharge. The shape of a hydrograph varies in each river basin and each storm event. This increases lag time. The peak discharge is also lower as it takes water longer to reach the river channel.
Baseflow is a portion of streamflow that is not directly generated from the excess rainfall during a storm event. In other words, this is the flow that would exist in the stream without the contribution of direct runoff from the rainfall.

How to Calculate Regional Constant given Peak Discharge?

Regional Constant given Peak Discharge calculator uses Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area to calculate the Regional Constant, The Regional Constant given Peak Discharge formula is defined as the constant for basin lag depending on the region under study. Regional Constant is denoted by Cr symbol.

How to calculate Regional Constant given Peak Discharge using this online calculator? To use this online calculator for Regional Constant given Peak Discharge, enter Peak Discharge (Qp), Basin Lag (tp) & Catchment Area (Acatchment) and hit the calculate button. Here is how the Regional Constant given Peak Discharge calculation can be explained with given input values -> 3.846043 = 0.891*21600/2.78*2.

FAQ

What is Regional Constant given Peak Discharge?
The Regional Constant given Peak Discharge formula is defined as the constant for basin lag depending on the region under study and is represented as Cr = Qp*tp/2.78*Acatchment or Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area. Peak Discharge is the maximum volume flow rate passing a particular location during an event, Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall & Catchment Area is an area of land where all water flows to a single stream, river, lake or even ocean.
How to calculate Regional Constant given Peak Discharge?
The Regional Constant given Peak Discharge formula is defined as the constant for basin lag depending on the region under study is calculated using Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area. To calculate Regional Constant given Peak Discharge, you need Peak Discharge (Qp), Basin Lag (tp) & Catchment Area (Acatchment). With our tool, you need to enter the respective value for Peak Discharge, Basin Lag & Catchment Area 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 Regional Constant?
In this formula, Regional Constant uses Peak Discharge, Basin Lag & Catchment Area. We can use 1 other way(s) to calculate the same, which is/are as follows -
  • Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3
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