publication . Research . 2009

Relation between 1m depth temperature and average geothermal gradient at 75cm depth in geothermal fields

江原, 幸雄;
Open Access Japanese
  • Published: 15 Mar 2009 Journal: 北海道大学地球物理学研究報告, volume 72, pages 1-10 (issn: 0439-3503, Copyright policy)
  • Publisher: 北海道大学大学院理学研究院自然史科学部門(地球物理学)
Abstract
Shallow ground temperatures such as 1m depth temperature have been measured to delineate thermal anomalies of geothermal fields and also to estimate heat discharge rates from geothermal fields. As a result, a close linear relation between 1m depth temperature and average geothermal gradient at 75cm depth has been recognized in many geothermal fields and was used to estimate conductive heat discharge rates. However, such a linear relation may show that the shallow thermal regime in geothermal fields is not conduction dominated but convection dominated. If so, estimated heat discharge rates assuming conductive heat transfer should be modified. The shallow geotherm...
Subjects
arxiv: Physics::GeophysicsAstrophysics::Earth and Planetary Astrophysics
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Research . 2009
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