# How does ground temperature vary with depth?

## How does ground temperature vary with depth?

Beneath our feet there are rich reserves of heat and energy stored in rocks and groundwater. On average, with increasing depth, the temperature increases by around 3°C per 100m. In the upper surface layers the heat in the ground comes from the sun.

## At what depth is ground temperature stable?

For depths below 5 to 6 m, ground temperatures are essentially constant throughout the year.

How far below ground is temperature constant?

AT a small depth (from 12 to 40 feet) below the surface of the earth the temperature is constant throughout the year, and this constant temperature of the soil differs little from the mean annual temperature of the air, except on mountains more than 6,000 feet high.

### What is the temperature of the ground about 10 feet deep?

The ground temperature at depths greater than 10 feet remains relatively constant through the year. At a depth of 10 feet (3.04 m), the average ground temperature is 75.12°F (23.96°C) in summer and 75.87°F (24.37°C) in winter.

### What is the temperature of the ground about 20 feet deep?

between 50 and 60 degrees” F
“The temperature of the Earth down 20 or 30 feet is a relatively constant number year-round, somewhere between 50 and 60 degrees” F, says John Kelly, the COO of the Geothermal Exchange Organization, a nonprofit trade organization in Washington, D.C., that lobbies for wider adoption of the technology.

Does the ground get warmer the deeper you go?

Of course Earth’s core is very hot. So below the permafrost, the temperature very slowly increases toward that hot core. It typically rises about one degree for every 70 feet deeper we go.

#### What is the temperature 30 feet underground?

“The temperature of the Earth down 20 or 30 feet is a relatively constant number year-round, somewhere between 50 and 60 degrees” F, says John Kelly, the COO of the Geothermal Exchange Organization, a nonprofit trade organization in Washington, D.C., that lobbies for wider adoption of the technology.

#### How deep in the ground can temperature variations be measured?

Temperatures were measured with thermocouples distributed in ground at a depth from 0 to 7 m (car park) and from 0 to 17 m (lawn). It was found that the short-period temperature variations reached a depth of approximately 1 m.

Can model equation predict ground temperature at certain depth?

Model equation was developed to predict the ground temperature at certain depth regardless ground materials and humidity level. The results indicated that the ground temperature significantly lower to 5m-depth. However, the reduction of the temperature after 5m was not significant; the deeper the ground, the temperature changes are negligible.

## Does the temperature change as the ground level of depth increases?

This finding is consistent with the previous researches that the temperature changes are negligible as the ground level of depth increase [9,11, 16]. This result also confirmed the research conducted by Andrarini et al. using simulation tool (i.e., EnergyPlus) to predict the ground temperature in Indonesia.

## How deep does the soil temperature stabilize?

… Even if it’s weakened and delayed (relative to the soilless season), the soil temperature stabilizes at about 15 meters average annual depth ( fig.1). The curves show the evolution of the temperature from the surface (0 m) to 4 m depth in steps of 0.5 m [11].