Regional Constant representing Watershed Slope and Storage Effects Calculator

✖Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.ⓘ Basin Lag [t_p]			+10% -10%
✖Length of Basin refers to the distance from one end of the basin to the other, typically measured along the longest axis.ⓘ Length of Basin [L_b]			+10% -10%
✖Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.ⓘ Distance along Main Water Course [L_ca]			+10% -10%

✖Regional Constant representing watershed slope and storage effect.ⓘ Regional Constant representing Watershed Slope and Storage Effects [C_r]

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Formula

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Regional Constant representing Watershed Slope and Storage Effects

Formula

`"C"_{"r"} = "t"_{"p"}/("L"_{"b"}*"L"_{"ca"})^0.3`

Example

`"0.129199"="6h"/("30m"*"12.0km")^0.3`

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Regional Constant representing Watershed Slope and Storage Effects Solution

STEP 0: Pre-Calculation Summary

Formula Used

Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3
C_r = t_p/(L_b*L_ca)^0.3
This formula uses 4 Variables

Variables Used

Regional Constant - Regional Constant representing watershed slope and storage effect.
Basin Lag - (Measured in Hour) - Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall.
Length of Basin - (Measured in Meter) - Length of Basin refers to the distance from one end of the basin to the other, typically measured along the longest axis.
Distance along Main Water Course - (Measured in Meter) - Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.

STEP 1: Convert Input(s) to Base Unit

Basin Lag: 6 Hour --> 6 Hour No Conversion Required
Length of Basin: 30 Meter --> 30 Meter No Conversion Required
Distance along Main Water Course: 12 Kilometer --> 12000 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

C_r = t_p/(L_b*L_ca)^0.3 --> 6/(30*12000)^0.3

Evaluating ... ...

C_r = 0.129199400995563

STEP 3: Convert Result to Output's Unit

0.129199400995563 --> No Conversion Required

FINAL ANSWER

0.129199400995563 ≈ 0.129199 <-- Regional Constant

(Calculation completed in 00.004 seconds)

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Coorg Institute of Technology (CIT), Coorg

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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 representing Watershed Slope and Storage Effects Formula

Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3
C_r = t_p/(L_b*L_ca)^0.3

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.

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.

How to Calculate Regional Constant representing Watershed Slope and Storage Effects?

Regional Constant representing Watershed Slope and Storage Effects calculator uses Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3 to calculate the Regional Constant, The Regional Constant representing Watershed Slope and Storage Effects formula is defined as the constant value depending on the region under study from Snyder's synthetic-unit Hydrograph to determine the Basin Lag. Regional Constant is denoted by C_r symbol.

How to calculate Regional Constant representing Watershed Slope and Storage Effects using this online calculator? To use this online calculator for Regional Constant representing Watershed Slope and Storage Effects, enter Basin Lag (t_p), Length of Basin (L_b) & Distance along Main Water Course (L_ca) and hit the calculate button. Here is how the Regional Constant representing Watershed Slope and Storage Effects calculation can be explained with given input values -> 0.129199 = 21600/(30*12000)^0.3.

FAQ

What is Regional Constant representing Watershed Slope and Storage Effects?

The Regional Constant representing Watershed Slope and Storage Effects formula is defined as the constant value depending on the region under study from Snyder's synthetic-unit Hydrograph to determine the Basin Lag and is represented as C_r = t_p/(L_b*L_ca)^0.3 or Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3. Basin Lag is the elapsed time between the occurrences of the centroids of the effective rainfall, Length of Basin refers to the distance from one end of the basin to the other, typically measured along the longest axis & Distance along Main Water Course from the gauging station to a point opposite to the watershed centroid in km.

How to calculate Regional Constant representing Watershed Slope and Storage Effects?

The Regional Constant representing Watershed Slope and Storage Effects formula is defined as the constant value depending on the region under study from Snyder's synthetic-unit Hydrograph to determine the Basin Lag is calculated using Regional Constant = Basin Lag/(Length of Basin*Distance along Main Water Course)^0.3. To calculate Regional Constant representing Watershed Slope and Storage Effects, you need Basin Lag (t_p), Length of Basin (L_b) & Distance along Main Water Course (L_ca). With our tool, you need to enter the respective value for Basin Lag, Length of Basin & Distance along Main Water Course 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 Basin Lag, Length of Basin & Distance along Main Water Course. We can use 1 other way(s) to calculate the same, which is/are as follows -

Regional Constant = Peak Discharge*Basin Lag/2.78*Catchment Area

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