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Title: 地熱地域における1m深地温と75cm深平均地温勾配との関係
Other Titles: Relation between 1m depth temperature and average geothermal gradient at 75cm depth in geothermal fields
Authors: 江原, 幸雄1 Browse this author
Authors(alt): Ehara, Sachio1
Issue Date: 15-Mar-2009
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)
Journal Title: 北海道大学地球物理学研究報告
Journal Title(alt): Geophysical bulletin of Hokkaido University
Volume: 72
Start Page: 1
End Page: 10
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 geothermal regime in geothermal fields was reexamined to estimate heat discharge rates more exactly.
Type: bulletin (article)
Appears in Collections:北海道大学地球物理学研究報告 = Geophysical bulletin of Hokkaido University > 第72号

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