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Investigation of a Doline in NE-Hesse with GPR (Cooperation with HLUG). The HLUG investigated a depression area in Bad Soden Allendorf. The geophysical investigation concentrated on the expansion of a depression caused by carstification of Permian (Zechstein) evaporite formation. The area is overbuilt with roads and single housings. The depression is situated right beneath a street. Different measures for stabilization and rehabilitation were under discussion. The investigation with GPR helped to determine the expansion of the endangered area. With this information, the covering was realized by a reinforced concrete plate. Determination of the Thermal Properties of Soils using Geophysical Methods especially Ground Penetrating Radar and Geoelectrical Methods (RELGeotherm) As the spatial distribution of thermal properties is important for the designing and monitoring of geothermal installations, a non-invasive, high-resolution geophysical investigation of the thermal properties is eligible. The basis for a development of a geophysical investigation of geothermal properties is the knowledge of the interrelation between geothermal and geophysical properties. Preliminary investigation started to determine quantitatively the dependence of geothermal properties on relative dielectric permittivity and electrical conductivity. Improvement of Infiltration Potential Maps using Ground Penetrating Radar (GPR) To generate infiltration potential maps, infiltration tests are performed punctually. Additionally, the geology and the land use are used to interpolate between these tests. This information can be extracted from maps and other available geotechnical, geological and other data and reports. The results of the infiltration tests are often varying even though the geology and the land use are looking similar. These variations are generated by small scaled discontinuities of the soils structure and the composition in the shallow subsurface. To achieve a high resolution spatial extrapolation of the results from infiltration tests, the structure and composition of the shallow subsurface must be investigated with a high resolution. Especially the hydrological properties are important. Therefore, the Infiltration process was monitored in a natural soil on two test sites, in Darmstadt, TU-Lichtwiese and Dieburg. The infiltration test was accomplished with a double ring Infiltrometer made of plastic to minimize the influence on the measurements with GPR. Determination of Hydraulic Properties of sintered HD-PE well Screens Sintered High Density Polyethylene well screens are hydrophobic. The sintering process allows control the pore sizes and tortuosity of pores. Additionally HD-PE filters offer a large open entrance area for the filtrandum (groundwater). Preliminary investigations have been accomplished to start an industry financed project in 2007. In this project the hydraulic properties will be investigated in laboratory scale and in the field. Determination of Geothermal Properties of Soils and Rocks For the dimensioning of Borehole Heat exchangers knowledge of thermal properties of soil is needed. Presently only few data about these properties are existing. Therefore, laboratory determination for the soils in the area of Calw (Germany) is performed and a potential map will be developed. - 120 -
Publications Burbaum, U. (2006): „Tragwerksplanung im konventionellen Tunnelbau“, Lecture in Frankfurt, Symposium of Fa. Wayss & Freytag Ingenieurbau AG Buss, A., Jahnke, C. (2006): Hydraulische Modellierung der hydrothermalen Prozesse im Geothermiefeld Kizildere/Tekkehamam (Türkei) - In: Voigt, H.-J., Kaufmann-Knoke, R., Jahnke, C & Herd. R.: Indikatoren im Grundwasser - Kurzfassung der Vorträge und Poster - Tagung der Fachsektion Hydrogeologie in der DGG - 24.-28. Mai 2006, Cottbus. - Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften, 43: 116; Hannover. Katzenbach, R. & Sass, I. (2006): Geothermal Summer School 2006.- lecture notes of the advanced training programme, 380 p. TUD. Katzenbach, R.; Sass, I.; Clauß, F. & Waberseck, T. (2006): Optimierung von Erdwärmesonden in Bezug auf Boden- und Grundwasserverhältnisse sowie Verpressmaterial - Qualitätssicherung - Tagungsband des 4. Forum Wärmepumpe, Solarpraxis AG, Berlin, 26.-27. Oktober 2006 Katzenbach, R.; Sass I.; Clauß F.; Waberseck T. (2006): Geothermische Erkundung zur Optimierung des Einsatzes erdgekoppelter Wärmepumpen, poster presentation 9. Geothermische Fachtagung, Karlsruhe, 15.-17. November 2006 Naser, M., Sass, I., Hornung, J., Hinderer, M. (2006): Geotechnische Untersuchung von Deichen mit Georadar, Mitteilungen des Institutes und der Versuchsanstalt für Geotechnik der Technischen Universität Darmstadt, Vorträge zum 13. Darmstädter Geotechnik-Kolloquium, Hrsg.: Prof- Dr.-Ing. Rolf Katzenbach, Heft 73, 151-160 Sass, I.; Hoppe, A.; Burbaum, U.; Lerch, C., Wawrzyniak, C.: "Bauen im Thermalwasserdistrikt - Geothermische Erkundung", poster presentation at the 9th geothermal congress, 15. - 17.11.2006 in Karlsruhe Sass, I. (2006): Bau und Ausbau von Erdwärmesonden, Qualitätssicherung, Vortrag im Rahmen der Fortbildungsveranstaltung Geothermie der Fachsektion Hydrogeologie in der Deutschen Gesellschaft für Geowissenschaften, am 11.Oktober 2006, Freiburg - 121 -
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ANNUAL REPORT 2 0 0 6 FACULTY OF MA
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Annual Report 2006 Faculty 11 Mater
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Preface The year 2006 of the Depart
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difference of numerical and analyti
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Institute of Materials Science Phys
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Research Projects Bulk Amorphous Al
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el Dsoki, C.; Landersheim, V. ; Kau
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Das, J.; Kim, K. B.; Xu, W.; Wei, B
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Staff Members Head Prof. Dr. Jürge
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Zhou L.; Rixecker G.; Aldinger F.;
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concerned with the synthesis and ch
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Publications Fleissner, A.; Schmid,
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• Surface analysis The UHV-surfac
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T. Mayer, U. Weiler, E. Mankel and
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Thin films The Thin Film division w
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Berky, W.; Gottschalk, S.; Elliman,
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Guest Scientists Research Projects
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Hesse, S.; Zimmermann, J.; von Segg
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Structure Research The research in
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Research Projects Functional Advanc
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Dincer, I.; Elerman, Y.; Elmali, A;
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hexakis(imidazole)nickel(II)bis(for
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Chemical Analytics The chemical ana
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Collaborations The above mentioned
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Hoffmann, P.; Non-Invasive Identifi
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Ferroelectrics For this class of ma
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Materials Modelling The research ac
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Materials for Renewable Energies In
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Joint Research Laboratory Nanomater
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Collaborative Research Center (SFB)
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B7 P.I.: Prof. H. v. Seggern / Dr.
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The glass transition temperature (T
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transition allows to investigate at
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Relative density 1.00 0.95 0.90 0.8
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Fig. 2 shows the time dependencies
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