No abstract

The workspace as Bouleuterion (parliament house) is located in the ancient city of Alabanda far approximately 7 km from Aydin, Çine. The works on the city plan are still continued by the Department of Archeology in Adnan Menderes University. In this work, a geophysical study based on electrical resistivity tomography (ERT) approach is used to bring out the existence of the buried structures and situations of ruins in Bouleuterion. This study is a good example of implementation of the electrical resistivity method to the archeology in a specific area (Bouleuterion). Furthermore, the paper shows to researchers practically advantages and disadvantages of Wenner and dipoledipole arrays that widely used in archeological prospection. Also with this work, a Bouleuterion has been subject of a geophysical article for the first time. By archeology and geophysics evaluations, it is proved that these ruins such as the cavea, stage, orchestra, and entrances are parts of the Bouleuterion.

The focus of this study is to examine the soil properties and liquefaction potential of the Erenler center district in a critical tectonic zone that can produce large earthquakes, such as the North Anatolian Fault Zone (NAFZ). In this sense, 40 surface wave measurements and 52 geotechnical drillings were employed. Accordingly, the liquefaction potential index (LPI), liquefaction severity index (LSI), Ishihara boundary (IB) curve, and Ishihara-inspired index (LPIISH) liquefaction approaches from geotechnical and geophysical methods were used as integrated. All liquefaction analyses were examined for two scenarios, Mw: 7.4 1999 Izmit (amax: 0.41 g) and Mw: 7.0 1967 (amax: 0.28 g) Mudurnu. According to the analyses, almost all of the study area showed liquefaction risk in the Izmit scenario. In the Mudurnu scenario, liquefaction risk distribution decreased parallel to acceleration. The LPI, LPIISH, and IB liquefaction risk results for both scenarios support each other. On the other hand, it was determined that the probability of liquefaction was lower in the LSI evaluation. The spatial distribution of the liquefaction potential of the Vs-based and SPT-based LPI assessments had a similar pattern. These results show that the LPI approach, originally SPT-based, can also be calculated based on Vs. In addition, according to Vs30-based (average shear wave velocity at 30 m depth) soil classification criteria, low-velocity character E and D soil groups dominate the Quaternary alluvial basin. This indicates that deformation-induced failures may occur even in areas with a low probability of liquefaction in similar strong ground motions. In addition, the evaluation of liquefaction with many approaches in two different bases within the scope of the study constitutes a novelty for the study area and liquefaction analyses. While performing diversified liquefaction analyses and approaches will contribute to obtaining more reliable soil liquefaction results, more case studies are needed to elucidate these comparisons.

Edge detection techniques are some of the most useful techniques to determine the lineaments of buried structures from magnetic data. In this context, many techniques have been designed by using the magnetic gradient tensor (MGT). In this work, eigenvalue analysis of the full MGT and a new normalized approach [normalized edge detector (NK)], which balances strong and weak amplitude anomalies simultaneously, was utilized to outline lineaments of the buried archaeological structures. Satisfactory results were obtained from noisy and noise free synthetic data which were generated from prism models. The techniques were implemented on the archaeological magnetic data acquired from a buried ancient cistern. In addition, three‐dimensional (3D) electrical resistivity tomography (ERT) inversion sections and two‐dimensional (2D) magnetic inversion section and tilt angle methods were used to compare them against the results of edge detection analysis. The results of the normalized eigenvalue analysis agreed closely with all techniques in detecting the lineaments of the buried archaeological structure. NK detected the lineaments of the buried structure more clearly than the tilt angle and had better resolution. All of the results have shown that eigenvalue analysis of the full MGT and especially the newly introduced approach NK can provide important information for archaeological studies.

Bu çalışmanın amacı, radyoaktif jeofizik kuyu logu araştırmalarından elde edilen Uranyum, Toryum, Potasyum ve Gamma-Ray verileri ile laboratuvar çalışmaları neticesinde hesaplanan Uranyum rezerv miktarları arasındaki ilişkilerin incelenmesidir. Çalışmada kullanılan veriler Nevşehir ili sınırları içerisinde toplanmış olup, toplam 34 sondaj çalışmasından karot alınarak elde edilmiştir. Bu karot numuneler laboratuvar ortamında incelenerek rezerv miktarının belirlenmesine yönelik fiziksel parametreler elde edilmiştir. Kuyu logu ve laboratuvar verilerine toplamda 38 olmak üzere basit ve çoklu regresyon analizlerii yapılmıştır. Regresyon analizleri sonucundaile her bir model için belirleme katsayısı (R 2 ), standart hata miktarları gibi istatistiksel değerler hesaplanmış ve Uranyum değerinin ve rezerv miktarının kestirimine yönelik olarak ampirik bağıntılar önerilmiştir.