Calculation of the Maximum Effect of Deep Lakes on Temperature Measurements: Some Estimation Derived From the Geothermal Gradient Determination
- Key words
- Geothermal gradient, reduced temperature, Laplace equation, lake
- Conference
- World Geothermal Congress
- Year
- 2010
- Session
- 13. Geophysics
- Language
- English
- Paper number
- 1302
Full text
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Abstract
Understanding climate change processes on the basis of geothermal observations in boreholes is an important and highly complex problem. Many non-climatic effects could cause changes in ground surface temperatures. In this study, the effects of deep lakes on the borehole temperature profiles observed within or in the vicinity of the lakes were investigated. A method based on the utilization of a Laplace equation with non-uniform boundary conditions is proposed. The proposed method makes it possible to estimate the maximum effect of deep lakes on the borehole temperature profiles. This method also allows one to estimate the accuracy of the geothermal gradient determination.
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