Enter two of the following values into the calculator and leave the remaining field empty to calculate the missing parameter.
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Soil Temperature Formula
The following equation is used to calculate the soil temperature.
T_soil = 10 + (T_surface - 10)*exp(-Depth)
- Where T_soil is the soil temperature (°C)
- T_surface is the surface temperature (°C)
- Depth is the depth in meters (m)
To calculate the missing value, fill in the two known fields and leave the unknown field empty.
What is a Soil Temperature Calculator?
Definition:
A Soil Temperature Calculator is a tool that uses an exponential decay model to estimate the temperature at a given depth based on the surface temperature and an assumed constant deep soil temperature of 10°C.
How to Calculate Soil Temperature?
Example Problem:
The following example outlines the steps and information needed to calculate the soil temperature parameter.
First, determine the surface temperature. In this example, the surface temperature is 25°C.
Next, determine the depth. In this example, the depth is 2 meters.
Finally, calculate the soil temperature using the formula above:
T_soil = 10 + (T_surface – 10)*exp(-Depth)
T_soil = 10 + (25 – 10)*exp(-2)
T_soil ≈ 12.03 °C
FAQ
What factors can affect soil temperature readings?
Soil temperature can be influenced by factors such as soil composition, moisture levels, vegetation cover, and the time of day. These factors can alter the rate at which temperature decreases with depth.
Why is a constant deep soil temperature of 10°C used in the calculation?
A constant deep soil temperature of 10°C is often assumed based on typical ground conditions in temperate regions, although this value can vary with location and season.
Can this calculator be applied to all soil types?
While the calculator uses a simplified exponential decay model for estimation, actual soil temperatures may vary depending on soil type, structure, and moisture. For more precise results, a more detailed analysis might be necessary.