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| Titel |
Hydraulic and thermal soil Parameter combined with TEM data at quaternary coastal regions |
| VerfasserIn |
Ima Grabowski, Reinhard Kirsch, Wolfgang Scheer |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250097528
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| Publikation (Nr.) |
 EGU/EGU2014-13121.pdf |
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| Zusammenfassung |
| In order to generate a more efficient method of planning and dimensioning small- and
medium sized geothermal power plants at quaternary subsurface a basic approach has been
attempted.
Within the EU-project CLIWAT, the coastal region of Denmark, Germany, Netherlands
and Belgium has been investigated and air borne electro magnetic data was collected. In this
work the regional focus was put on the isle of Föhr. To describe the subsurface with relevant
parameters one need the information from drillings and geophysical well logging data. The
approach to minimize costs and use existing data from state agencies led the investigation to
the combination of specific electrical resistivity data and hydraulic and thermal
conductivity. We worked out a basic soil/hydraulic conductivity statistic for the isle
of Föhr by gathering all well logging data from the island and sorted the existing
soil materials to associated kf –values. We combined specific electrical resistivity
with hydraulic soil properties to generate thermal conductivity values by extracting
porosity.
Until now we generated a set of rough data for kf - values and thermal conductivity. The
air borne TEM data sets are reliable up to 150 m below surface, depending on the
conductivity of the layers. So we can suppose the same for the differentiated parameters.
Since this is a very rough statistic of kf –values, further more investigation has to be
made.
Although the close connection to each area of investigation either over existing logging
data or laboratory soil property values will remain necessary.
Literature: Ahmed S, de Marsily G, Talbot A (1988): Combined Use of Hydraulic and
Electrical Properties of an Aquifer in a Geostatistical Estimation of Transmissivity. –
Groundwater, vol. 26 (1) Burschil T, Scheer W, Wiederhold H, Kirsch R (2012): Groundwater
situation on a glacially affected barrier island.Submitted to Hydrology and Earth
System Sciences - an Interactive Open Access Journal of the European Geosciences
Union
Burval Working Group (2006) Groundwater Resources in buried valleys- a challenge for
Geosciences. – Leibniz-Institut für Angewandte Geophysik, Hannover Scheer W, König B,
Steinmann F (2012): Die Grundwasserverhältnisse von Föhr. - In: Der Untergrund von Föhr:
Geologie, Grundwasser und Erdwärme – Ergebnisse des INTERREG-Projektes CLIWAT. –
Landesamt für Landwirtschaft, Umwelt und ländliche Räume Schleswig-Holstein,
Flintbek |
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