Geophysical investigations at Agadere Cemetery, Gallipoli Peninsular, NW Turkey

Abstract

Historical cemeteries are challenging targets for geophysical prospection but some non-destructive imaging techniques may be successful for mapping buried cemeteries if applied appropriately. Ground-Penetrating-Radar (GPR) has generally been considered to be the only geophysical method for determining cemeteries; however, Electrical-Resistivity-Tomography (ERT) and Magnetic-Imaging (MI), may determine geophysical traces of such cemeteries. Thus, as a first attempt at applying geophysical methods in the cemetery area of the Gallipoli Peninsula, these techniques were used to explore the buried graves at Agadere Cemetery. In this study, measured apparent resistivity data were processed using a two-dimensional (2D) tomographic inversion scheme. Resultant resistivity depth slices and volumetric resistivity images clearly showed the anomaly zone, which may be attributed to anthropogenic burials. Additionally, three-dimensional (3D) visualization of GPR results indicated some anomalies, much like the resistivity anomalies in terms of location. MI data were processed using linear transformations and an analytic signal image map presented anomaly zones located in some parts of the area, which are in agreement with those obtained by ERT and GPR surveys. Results derived from data processing techniques showed that these methods are suitable for bordering the locations of other buried historical graves in areas that have the same geological environment in the Peninsula.

Determination of Grave Locations with High Resolution Ground-penetrating Radar (GPR) in War Cemeteries: Sample Study of Biga (Çanakkale) War Graves

“…Generally, GPR data are applied at certain intervals with a defined grid area. The method is generally related to the variation caused to electromagnetic signals produced by an antenna during two-way underground travel and the difference compared with the original signal (Conyers, 2004;Yalçıner et al, 2009;Büyüksaraç et al, 2014;Yalçıner et al, 2017). The speed of GPR signals is determined by the physical and chemical properties of the travel environment and these signals reach the target and collect information about it.…”

Yeni Nesil Yazılım Paketleri Kullanarak Üç-Boyutlu Görüntüleme Tekniklerinin Elektrik Özdirenç Tomografi Verilerine Uygulanması

“…Bilindiği üzere, bilgisayar denetimli çoklu elektrot özdirenç ölçüm sistemlerinin gelişimi ve kullanılan ters çözüm algoritmaları, farklı problemler için sığ yeraltı yapılarının araştırılmasında elektrik özdirenç tomografi (EÖT) yöntemini oldukça cazip hale getirmiştir [3][4][5][6][7][8]. Gerçekleştirilen ölçümler iki-veya üç-boyutlu olarak çok kısa sürede tamamlanabilmekte ve başarılı sonuçlar alınabilmektedir.…”

Geophysical investigation for detecting buried human remains after eight years of burial in Owo, Southwestern Nigeria

“…Deployment of geophysical survey instruments for the purpose of grave detection and location has often taken place in church graveyards and cemeteries [13][14][15][16][17][18]. Though the approach that is adopted for any forensic investigation may vary, but it is dependent on a number of factors which includes the nature of burial, the circumstance surrounding the burial, the geological settings, the soil types all of which are determinant factors that are to be considered along with geophysical contrasts/anomalies of interest, all of which must be considered with the parameters that will assist in the detection [19][20][21][22].…”