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  • Drahor, Mahmut G.  (4)
  • English  (4)
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  • English  (4)
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  • 1
    Online Resource
    Online Resource
    Wiley ; 2015
    In:  Near Surface Geophysics Vol. 13, No. 6 ( 2015-12), p. 523-543
    In: Near Surface Geophysics, Wiley, Vol. 13, No. 6 ( 2015-12), p. 523-543
    Abstract: In this paper, an integrated geophysical investigation of a sacred area in the archaeological site of Šapinuwa is presented. Šapinuwa was one of the important cities in the Hittite Empire. The archaeological site of Šapinuwa is located in the Çorum region of Central Anatolia, Turkey. The goal of the here presented integrative archaeological prospection investigation was to explore buried structures inside the so‐called sacred Taşdöşem area (Taşdöşem means “the stone pavement”) by employing a number of different near‐surface geophysical prospection methods. To this purpose, magnetic gradiometry, ground‐penetrating radar, electrical resistivity tomography, seismic refraction tomography, and multi‐channel analysis of surface wave tomography were applied in this specific area. Overall, the results of the individual geophysical investigations were superimposed in order to obtain more detailed and comprehensive integrative interpretations on the burials contained inside this sacred area. Electrical tomography depth slices revealed the presence of an important structure buried inside the Taşdöşem area. Surprisingly, the velocity variations observed in the depth slices of the multi‐channel analysis of surface wave tomography provided important information on the character of the burial structure. Additionally, seismic refraction tomography sections and depth slices confirmed the presence of the structures in the same locations. The result of the ground‐penetrating radar investigation did not present sufficient certainty regarding the possible deeper burials, whereas the magnetic gradiometry survey gave some insight into near‐surface structures. The combination of the employed geophysical prospection techniques was successfully able to characterize the structures that are assumed to have been buried within the Taşdöşem area. It is concluded that the integrated non‐invasive geophysical archaeological prospection study conducted at Šapinuwa provides a good example on how to approach the investigation and documentation of sites similar to the Taşdöşem.
    Type of Medium: Online Resource
    ISSN: 1569-4445 , 1873-0604
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2247665-9
    SSG: 16,13
    Location Call Number Limitation Availability
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  • 2
    Online Resource
    Online Resource
    Elsevier BV ; 2011
    In:  Journal of Archaeological Science Vol. 38, No. 9 ( 2011-9), p. 2231-2242
    In: Journal of Archaeological Science, Elsevier BV, Vol. 38, No. 9 ( 2011-9), p. 2231-2242
    Type of Medium: Online Resource
    ISSN: 0305-4403
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2011
    detail.hit.zdb_id: 1468969-8
    SSG: 6,14
    SSG: 6,11
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  • 3
    Online Resource
    Online Resource
    Wiley ; 2016
    In:  Near Surface Geophysics Vol. 14, No. 2 ( 2016-04), p. 156-169
    In: Near Surface Geophysics, Wiley, Vol. 14, No. 2 ( 2016-04), p. 156-169
    Abstract: This paper presents the results of three ground‐penetrating radar case studies applied to indoor, bridge deck, and pier construction types in Turkey. In these studies, 270‐MHz and 1600‐MHz anten‐nas were employed to determine the ability limits for construction materials and diagnostic problems associated with the materials. In addition, the importance of the selected survey direction was tested during measurement. Analysing the significance of the migration technique during the data processing stage was another important goal of these case studies. The first case study analyses the indoor applications (e.g., house, villa, and fabric) of ground‐penetrating radar and aims to identify possible cracks, structural defects, and corrosion damage. The second case applies ground‐penetrating radar to a bridge deck. The third case investigates pier construction by establishing the layout of the construction materials. Identifying possible defects, including structural problems within the pier structure, was another goal. These case studies provide interesting results in terms of physically characterizing the concrete structure and the locations of rebar and slab conditions; the work also reveals the moisture and corrosion effects inside the construction materials on indoor, bridge and pier applications of ground‐penetrating radar.
    Type of Medium: Online Resource
    ISSN: 1569-4445 , 1873-0604
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 2247665-9
    SSG: 16,13
    Location Call Number Limitation Availability
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  • 4
    Online Resource
    Online Resource
    Wiley ; 2014
    In:  Near Surface Geophysics Vol. 12, No. 3 ( 2014-06), p. 337-350
    In: Near Surface Geophysics, Wiley, Vol. 12, No. 3 ( 2014-06), p. 337-350
    Abstract: This investigation examines the electrical resistivity tomography (ERT) monitoring performed at geothermal sites. It includes two phases of time‐lapse ERT studies of the shallow geothermal liquid transportation that results from the circulation of injected and re‐injected liquids: synthetic modelling and field surveys. The synthetic modelling stage indicated that the injection process in the horizontal layered environment could cause temporal variations. The field investigation was performed between March 2010 and February 2011 at the Balçova geothermal site, Izmir‐Turkey, which has supplied in‐house heating since the 1990s. The time‐lapse ERT investigations were performed on a shallow aquifer system near two boreholes used as injection and re‐injection. In this study, the percentage changes in the synthetic models were determined and compared to the observed inverted time‐lapse monitoring data. We propose that time‐lapse inversion results are more reliable than the standard inversion approximation. However, the resistivity artefacts were significant, and were dependent on the selection of the comparison model and the inversion parameters. Also the selection of the initial model was shown to be the most important step in constraining the later temporal datasets. During the monitoring period, we observed very substantial decreases in the resistivity of time‐lapse results. We conclude that these observed decreases are a result of subsurface temperature or salinity changes associated with the hydrothermal system and fault zone. As a result, this study indicates that time‐lapse studies could be important in the characterisation of the subsurface changes that are connected with geothermal operations and climatic fluctuations.
    Type of Medium: Online Resource
    ISSN: 1569-4445 , 1873-0604
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2247665-9
    SSG: 16,13
    Location Call Number Limitation Availability
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