Shape Factor Calculator

Category	Engineering ↺
Engineering	Civil ↺
Civil	Hydrology and Irrigation ↺
Hydrology-And-Irrigation	Runoff ↺
Runoff

✖Watershed Length is distance from outlet to watershed boundary along main channel.ⓘ Watershed Length [L]			+10% -10%
✖Catchment Area is an area of land where all water flows to a single stream, river, lake or even oceanⓘ Catchment Area [A]			+10% -10%

✖Shape Factor refers to a value that is affected by an object's shape.ⓘ Shape Factor [B_sb]

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Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has created this Calculator and 500+ more calculators!

Himanshi Sharma

Bhilai Institute of Technology (BIT), Raipur

Himanshi Sharma has verified this Calculator and 500+ more calculators!

< 11 Other formulas that you can solve using the same Inputs

Mean Annual Flood proposed by Natural Environment Research Council

Mean Annual Flood=Constant number depending on Location*Catchment Area^0.94*Stream Frequency^0.27*Slope of Catchment^0.16*Soil Type Index^1.23*First day Rainfall^1.03*(1+Area of Lakes or Reservoirs)^-0.85 GO

Fuller's formula for Maximum Flood Discharge

Peak Discharge=Coefficient*Catchment Area^0.8*(1+0.8*log10(Return Period)) GO

Rational Method of Peak Discharge

Peak Discharge=Coefficient of Runoff*Intensity of Rainfall*Catchment Area GO

Peak Value of the Runoff

peak runoff=Coefficient of Runoff*Catchment Area*Intensity of Rainfall GO

Inglis Formula for areas between 160 to 1000 km^2

Peak Discharge=123.2*sqrt(Catchment Area-2.62*(Catchment Area-259)) GO

Inglis Formula for Larger Areas

Peak Discharge=123.2*Catchment Area/sqrt(Catchment Area+10.36) GO

Baird and Mcillwraith Formula for maximum flood discharge

Peak Discharge=3025*Catchment Area/(278+Catchment Area)^0.78 GO

Dredge or Burge formula

Peak Discharge=19.6*Catchment Area/(Length of Basin)^2/3 GO

Ryves Formula

Peak Discharge=Ryves Coefficient*Catchment Area^2/3 GO

Dicken's Formula

Peak Discharge=Dickens Constant*Catchment Area^3/4 GO

Inglis Formula for Small Areas

Peak Discharge=123.2*sqrt(Catchment Area) GO

Shape Factor Formula

Shape Factor=(Watershed Length)^2/Catchment Area
B<sub>sb</sub>=(L)^2/A

More formulas

Drainage Density GO

Length of all Streams when Drainage Density Given GO

Catchment Area when Drainage density is known GO

Stream Density GO

Number of Streams when Stream Density is Known GO

Catchment Area when Stream Density is known GO

Length of Overland Flow GO

Watershed Length when Shape Factor is known GO

Watershed Area when Shape factor is known GO

Form Factor GO

Form factor when Width of the Basin is given GO

Form factor when Shape factor is given GO

What determines the Shape of a Watershed?

The Shape of a Watershed influences the shape of its characteristic hydrograph. For example, a long shape watershed generates, for the same rainfall, a lower outlet flow, as the concentration time is higher.

How to Calculate Shape Factor?

Shape Factor calculator uses Shape Factor=(Watershed Length)^2/Catchment Area to calculate the Shape Factor, The Shape factor formula is defined as the shortest distance between the catchment outlet and centroid divided by the square root of the catchment area. Shape Factor and is denoted by B_sb symbol.

How to calculate Shape Factor using this online calculator? To use this online calculator for Shape Factor, enter Watershed Length (L) and Catchment Area (A) and hit the calculate button. Here is how the Shape Factor calculation can be explained with given input values -> 113.6364 = (50)^2/22.

FAQ

What is Shape Factor?

The Shape factor formula is defined as the shortest distance between the catchment outlet and centroid divided by the square root of the catchment area and is represented as B_sb=(L)^2/A or Shape Factor=(Watershed Length)^2/Catchment Area. Watershed Length is distance from outlet to watershed boundary along main channel and Catchment Area is an area of land where all water flows to a single stream, river, lake or even ocean.

How to calculate Shape Factor?

The Shape factor formula is defined as the shortest distance between the catchment outlet and centroid divided by the square root of the catchment area is calculated using Shape Factor=(Watershed Length)^2/Catchment Area. To calculate Shape Factor, you need Watershed Length (L) and Catchment Area (A). With our tool, you need to enter the respective value for Watershed Length and Catchment Area 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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