The variations in Water Temperature in an environment provide indications regarding the origin and flow of the water.
Water Temperature is usually linked with other parameters, especially conductivity and pH.
Temperature analysis should be done in situ with a thermometer.
Groundwater Temperature.
Temperature gradients.
It is generally considered that the geothermal temperature gradient is 1°C per 33 m.
This means that the deeper the groundwater is , the hotter it is.
Generally, the following classification can be established :
depth between 2 and 5 m -- zone of daily temperature variation.
depth between 15 and 40 m -- zone of annual temperature variation.
depth greater than 40 m -- constant temperature zone.
Classification.
Particular causes, such as volcanic or thermal effects, have a significant influence on water temperature.
There are three types of water source, depending on the difference between the average annual temperature of water and air :
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Water Temperature > 4°C more than Air Temperature - thermal source.
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Water Temperature = Air Temperature - normal source.
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Water Temperature > 4°C less than Air Temperature - Hypothermal source.