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Mithila Muthamma PA
Coorg Institute of Technology (CIT), Coorg
Mithila Muthamma PA has created this Calculator and 500+ more calculators!
Chandana P Dev
NSS College of Engineering (NSSCE), Palakkad
Chandana P Dev has verified this Calculator and 500+ more calculators!

11 Other formulas that you can solve using the same Inputs

Equation for Daily Lake Evaporation
Daily Lake Evaporation =Precipitation+(Daily Surface Inflow-Daily Surface Outflow)+(Daily Groundwater Inflow-Daily Seepage Outflow)-Daily Transpiration Loss-Increase in Lake Storage in a Day GO
Daily Surface Inflow into the Lake
Daily Surface Inflow=Daily Seepage Outflow+Daily Surface Outflow+Daily Lake Evaporation +Increase in Lake Storage in a Day+Daily Transpiration Loss-Precipitation-Daily Groundwater Inflow GO
Water Budget Equation for a catchment considering time interval
Change in Mass Storage=Precipitation-Surface Runoff-Net Ground Water Flowing outside the Catchment-Evaporation from water body (mm/day) -Transpiration GO
consumptive use of water for large areas
Consumptive use of Water for large areas=Total inflow+Precipitation+(Ground Water Storage-Ground Water Storage at the end)-Mass Outflow GO
Evaporation when Precipitation is known.
Evaporation from water body (mm/day) =Precipitation-Surface Runoff GO
Runoff when Precipitation is known.
Surface Runoff=Precipitation-Evaporation from water body (mm/day) GO
Precipitation
Precipitation=Surface Runoff+Evaporation from water body (mm/day) GO
Total Runoff over a catchment
Runoff=Surface Runoff+Interflow+Baseflow+Channel Precipitation GO
Precipitation in Rainfall-runoff relationship
Precipitation=Surface Runoff+Runoff Losses GO
Runoff losses in rainfall-runoff relationship
Runoff Losses=Precipitation-Surface Runoff GO
Rainfall-runoff Relationship
Surface Runoff=Precipitation-Runoff Losses GO

The W – Index Formula

W-Index=Precipitation-Surface Runoff-Depression and Interception Losses/Time Period of Runoff
W=P-S-Ia/T<sub>f</sub>
More formulas
Total Storm Precipitation when W-Index is Given GO
Total Storm Runoff when W-Index is Given GO
Initial Losses when W-Index is Given GO
Duration of Rainfall Excess when W-Index is Given GO

What is W-Index?

W-Index is the average infiltration rate that is calculated during the time when the intensity of rainfall is exceeding the infiltration rate.

How to Calculate The W – Index?

The W – Index calculator uses W-Index=Precipitation-Surface Runoff-Depression and Interception Losses/Time Period of Runoff to calculate the W-Index, The The W – Index formula is defined as the average infiltration rate during the time when the rainfall intensity exceeds the infiltration rate. W-Index and is denoted by W symbol.

How to calculate The W – Index using this online calculator? To use this online calculator for The W – Index, enter Precipitation (P), Surface Runoff (S), Depression and Interception Losses (Ia) and Time Period of Runoff (Tf) and hit the calculate button. Here is how the The W – Index calculation can be explained with given input values -> -0.095002 = 0.005-0.1-0.06/28800.

FAQ

What is The W – Index?
The The W – Index formula is defined as the average infiltration rate during the time when the rainfall intensity exceeds the infiltration rate and is represented as W=P-S-Ia/Tf or W-Index=Precipitation-Surface Runoff-Depression and Interception Losses/Time Period of Runoff. Precipitation is the primary water input to the hydrologic cycle and is evaluated for all water budget calculations. , Surface Runoff water, from rain, snowmelt, or other sources, that flows over the land surface, and is a major component of the water cycle. , Depression and Interception Losses and Time Period of Runoff during which rainfall intensity exceeds infiltration capacity, .
How to calculate The W – Index?
The The W – Index formula is defined as the average infiltration rate during the time when the rainfall intensity exceeds the infiltration rate is calculated using W-Index=Precipitation-Surface Runoff-Depression and Interception Losses/Time Period of Runoff. To calculate The W – Index, you need Precipitation (P), Surface Runoff (S), Depression and Interception Losses (Ia) and Time Period of Runoff (Tf). With our tool, you need to enter the respective value for Precipitation, Surface Runoff, Depression and Interception Losses and Time Period of Runoff 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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