Aridity Index Calculator

✖Daily Potential Evapotranspiration (PET) is calculated from climate parameter data that is extracted from Global Data Assimilation System (GDAS) analysis fields.ⓘ Daily Potential Evapotranspiration [PET]			+10% -10%
✖Actual Evapotranspiration is the quantity of water that is actually removed from a surface due to the processes of evaporation and transpiration.ⓘ Actual Evapotranspiration [E_act]			+10% -10%

✖Aridity Index is a numerical indicator of the degree of dryness of the climate at a given location.ⓘ Aridity Index [AI]

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Formula

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Aridity Index

Formula

`"AI" = (("PET"-"E"_{"act"})/"PET")*100`

Example

`"99.68"=(("50m³/s"-"0.16m³/s")/"50m³/s")*100`

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Aridity Index Solution

STEP 0: Pre-Calculation Summary

Formula Used

Aridity Index = ((Daily Potential Evapotranspiration-Actual Evapotranspiration)/Daily Potential Evapotranspiration)*100
AI = ((PET-E_act)/PET)*100
This formula uses 3 Variables

Variables Used

Aridity Index - Aridity Index is a numerical indicator of the degree of dryness of the climate at a given location.
Daily Potential Evapotranspiration - (Measured in Cubic Meter per Second) - Daily Potential Evapotranspiration (PET) is calculated from climate parameter data that is extracted from Global Data Assimilation System (GDAS) analysis fields.
Actual Evapotranspiration - (Measured in Cubic Meter per Second) - Actual Evapotranspiration is the quantity of water that is actually removed from a surface due to the processes of evaporation and transpiration.

STEP 1: Convert Input(s) to Base Unit

Daily Potential Evapotranspiration: 50 Cubic Meter per Second --> 50 Cubic Meter per Second No Conversion Required
Actual Evapotranspiration: 0.16 Cubic Meter per Second --> 0.16 Cubic Meter per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

AI = ((PET-E_act)/PET)*100 --> ((50-0.16)/50)*100

Evaluating ... ...

AI = 99.68

STEP 3: Convert Result to Output's Unit

99.68 --> No Conversion Required

FINAL ANSWER

99.68 <-- Aridity Index

(Calculation completed in 00.004 seconds)

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Credits

Created by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

Mithila Muthamma PA has created this Calculator and 2000+ more calculators!

Verified by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has verified this Calculator and 1700+ more calculators!

< 7 Evapotranspiration Calculators

Runoff given Change in Moisture Storage

Go Surface Runoff = -(Change in Moisture Storage-Precipitation+Subsurface Outflow+Actual Evapotranspiration)

Subsurface Outflow given Change in Moisture Storage

Go Subsurface Outflow = Precipitation-Change in Moisture Storage-Surface Runoff-Actual Evapotranspiration

Precipitation given Change in Moisture Storage

Go Precipitation = Change in Moisture Storage+Surface Runoff+Subsurface Outflow+Actual Evapotranspiration

Change in Moisture Storage

Go Change in Moisture Storage = Precipitation-Surface Runoff-Subsurface Outflow-Actual Evapotranspiration

Actual Evapotranspiration

Go Actual Evapotranspiration = Precipitation-Change in Moisture Storage-Surface Runoff-Subsurface Outflow

Aridity Index

Go Aridity Index = ((Daily Potential Evapotranspiration-Actual Evapotranspiration)/Daily Potential Evapotranspiration)*100

Actual Evapotranspiration given Aridity Index

Go Actual Evapotranspiration = Daily Potential Evapotranspiration-(Aridity Index*Daily Potential Evapotranspiration/100)

Aridity Index Formula

Aridity Index = ((Daily Potential Evapotranspiration-Actual Evapotranspiration)/Daily Potential Evapotranspiration)*100
AI = ((PET-E_act)/PET)*100

What is aridity in geography?

Aridity is a nature produced permanent imbalance in the water availability consisting in low average annual precipitation, with high spatial and temporal variability, resulting in overall low moisture and low carrying capacity of the ecosystems.

How to Calculate Aridity Index?

Aridity Index calculator uses Aridity Index = ((Daily Potential Evapotranspiration-Actual Evapotranspiration)/Daily Potential Evapotranspiration)*100 to calculate the Aridity Index, The Aridity Index is a numerical indicator of the degree of dryness of the climate at a given location. Aridity Index is denoted by AI symbol.

How to calculate Aridity Index using this online calculator? To use this online calculator for Aridity Index, enter Daily Potential Evapotranspiration (PET) & Actual Evapotranspiration (E_act) and hit the calculate button. Here is how the Aridity Index calculation can be explained with given input values -> 99.68 = ((50-0.16)/50)*100.

FAQ

What is Aridity Index?

The Aridity Index is a numerical indicator of the degree of dryness of the climate at a given location and is represented as AI = ((PET-E_act)/PET)*100 or Aridity Index = ((Daily Potential Evapotranspiration-Actual Evapotranspiration)/Daily Potential Evapotranspiration)*100. Daily Potential Evapotranspiration (PET) is calculated from climate parameter data that is extracted from Global Data Assimilation System (GDAS) analysis fields & Actual Evapotranspiration is the quantity of water that is actually removed from a surface due to the processes of evaporation and transpiration.

How to calculate Aridity Index?

The Aridity Index is a numerical indicator of the degree of dryness of the climate at a given location is calculated using Aridity Index = ((Daily Potential Evapotranspiration-Actual Evapotranspiration)/Daily Potential Evapotranspiration)*100. To calculate Aridity Index, you need Daily Potential Evapotranspiration (PET) & Actual Evapotranspiration (E_act). With our tool, you need to enter the respective value for Daily Potential Evapotranspiration & Actual Evapotranspiration 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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