Enter the water depth (in) and the elapsed time (min) into the Soil Infiltration Rate Calculator. The calculator will evaluate the Soil Infiltration Rate.

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## Soil Infiltration Rate Formula

The following two example problems outline the steps and information needed to calculate the Soil Infiltration Rate.

**SIR = WD / T**

- Where SIR is the Soil Infiltration Rate (in/min)
- WD is the water depth (in)
- T is the elapsed time (min)

## How to Calculate Soil Infiltration Rate?

The following example problems outline how to calculate Soil Infiltration Rate.

Example Problem #1:

- First, determine the water depth (in).
- The water depth (in) is given as: 5.

- Next, determine the elapsed time (min).
- The elapsed time (min) is provided as: 30.

- Finally, calculate the Soil Infiltration Rate using the equation above:

SIR = WD / T

The values provided above are inserted into the equation below and computed.

SIR = 5 / 30 = .167 (in/min)

Example Problem #2:** **

For this problem, the variables required are provided below:

water depth (in) = 6

elapsed time (min) = 10

Test your knowledge using the equation and check your answer with the calculator..

SIR = WD / T** = ?**