The maximum effect of deep lakes on temperature profiles - Determination of the geothermal gradient

V. T. Balobaev, I. M. Kutasov, L. V. Eppelbaum

Research output: Contribution to journalArticlepeer-review

Abstract

Understanding the climate change processes on the basis of geothermal observations in boreholes is an important and at the same time high-intricate problem. Many non-climatic effects could cause changes in ground surface temperatures. In this study we investigate the effects of deep lakes on the borehole temperature profiles observed within or in the vicinity of the lakes. We propose a method based on utilization of Laplace equation with nonuniform boundary conditions. The proposed method makes possible to estimate the maximumeffect of deep lakes (here the term"deep lake" means that long termmean annual temperature of bottom sedimentscan be considered as a constant value) on the borehole temperature profiles. This method also allows one to estimatean accuracy of the determination of the geothermal gradient.

Original languageEnglish
Pages (from-to)54-63
Number of pages10
JournalEarth Sciences Research Journal
Volume13
Issue number1
StatePublished - Jun 2009

Keywords

  • Geothermal gradient
  • Lake
  • Laplace equation
  • Reduced temperature

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