ISSN:
1573-1626
Source:
Springer Online Journal Archives 1860-2000
Topics:
Architecture, Civil Engineering, Surveying
,
Geosciences
,
Physics
Description / Table of Contents:
Summary The effect of an irregular contact of two different rock types on the surface heat flow was analysed for the Zlatý Kopec region in northwest Bohemia. The 2-D geothermal model of subsurface structures was compiled according to measured values of the thermal conductivity and heat sources and by using isobaths map of the metamorphite-granite boundary. The heat flow was computed numerically from the temperature distribution obtained as a finite-difference solution of the heat conduction equation. It was found that the heat flow variation, corresponding to the most probable model, amounts approximately to the half of the actually observed changes. The surface heat flow is affected strongly by the thermal conductivity contrast between the overlying metamorphites and underlying granites and, on the contrary, it is little sensitive to the heat production difference between both rock types. It seems, therefore, that, despite the big heat production contrast observed, the main source of the heat flow variability are thermal conductivity inhomogeneities.
Notes:
Резюме Обсуж¶rt;aеmся влuянuе конmaкma ¶rt;вух оm¶rt;ельных munовгорных nоро¶rt; нa nоверхносmныŭ mеnловыŭ nоmок ¶rt;ля овлaсmu Злamы Коnец в северозana¶rt;ноŭ Чехuu. Нa основе uзмеренных знaченuŭ mеnлоnрово¶rt;носmu u mеnлогенерaцuu u с nомощью кaрmыгяубuны зaлегaнuягрaнuцыгрaнum — Меmaморфuческuе nоро¶rt;ы былa сосmaвленa ¶rt;вумернaя мо¶rt;ель nрunоверхносmных сmрукmур. Теnловыŭ nоmок рaссчumaн с nомощью конечно-рaзносmного решенuя урaвненuя mеnлоnрово¶rt;носmu. Из резульmamов сле¶rt;уеm, чmо вaрuaцuя mеnлового nоmокa оmвечaющего сaмоŭ верояmноŭ мо¶rt;елu, nре¶rt;сmaвляеm nрuблuзumельно nоловuну нaблю¶rt;aемых uзмененuŭ. Нa nоверхносmныŭ mок сuльно влuяеm рaзнuцa mеnлоnрово¶rt;носmu меж¶rt;у сверхзaлегaющuмu меmaморфuческuмu nоро¶rt;aмu u нuжезaлегaющuмгрaнumом, u нaобороm, nоmок мaло чувсmвumельныŭ к рaзнuuе в mеnлогенерaцuu меж¶rt;у эmuмu nоро¶rt;aмu. Можно зaключumь, чmо, несмоmря нa нaблю¶rt;aемыю рaзнuцу в mеnлогенерaцuu,глaвным uсmочнuком вaрuaцuŭ mеnлового nоmокa являюmся нео¶rt;норо¶rt;носmu коэфщuенma mеnлоnрово¶rt;носmu.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01637579
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