Heat Flow Maps And Deep Ground Water Circulation- Examples From Switzerland
Journal Article: Heat Flow Maps And Deep Ground Water Circulation- Examples From Switzerland
AbstractThe effect of regional and local ground water circulation systems on the Heat Flow Density (HFD) field is demonstrated by two examples from Switzerland, one near St. Gall in an area at the northern border of the Alps, and the other northwest of Zurich along the eastern end of the Jura mountains. Detailed HFD maps of both areas slow pronounced high heat flow zones which are attributed to discharge of subsurface water which has migrated laterally over several 10 km. Seepage velocities on the order of several mm/yr have been calculated. Geothermal information is not available about the infiltration zones where low HFD values are expected. Geochemical and isotopic analysis of water samples from springs and drillholes indicates the recharge zones and demonstrates the effect of extensive regional systems. These results indicate that in regions with significant topographic relief HFD mapping can be seriously biased if drillholes are positioned in valleys which correspond to discharge areas with relatively high HFD, whereas the low heat flow zones remain undetected.
- Ph Bodmer and L. Rybach
- Published Journal
- Journal of Geodynamics, 1985
Ph Bodmer,L. Rybach. 1985. Heat Flow Maps And Deep Ground Water Circulation- Examples From Switzerland. Journal of Geodynamics. (!) .