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    An assessment of deterioration in cultural heritage: the unique case of Eflatunpinar Hittite Water Monument in Konya, Turkey
    (Springer Heidelberg, 2020) Bozdag, Ali; Ince, Ismail; Bozdag, Ayla; Hatir, M. Ergun; Tosunlar, M. Bahadir; Korkanc, Mustafa
    Stone monuments are important symbols of cultural heritage of countries. However, many environmental factors negatively affect these monuments. The increasing damage on the stone monuments and the danger of irreversible loss of cultural heritage have resulted in growing efforts for the preservation of the monuments. Eflatunpinar Hittite Water Monument in Beysehir, Konya, Turkey, is a unique Hittite cultural monument that has survived for nearly 3200 years even though it has been exposed to many environmental effects. In this study, non-destructive testing (NDT) was used to detect the degradation on the building stones of the Eflatunpinar Hittite Water Monument and change-deterioration maps were prepared subsequently. It was also investigated whether the chemistry of the Eflatunpinar spring water may cause deterioration. Additionally, the petrographic, chemical, and physico-mechanical properties of the rocks taken from the ancient stone quarry were determined in order to compare with the properties of the monument's building stones. Based on the physico-chemical characteristics of the Eflatunpinar spring water and XRD results of crusts in building stone surface of the monument, it was identified that water can be effective on the formation of calcite and gypsum crusts especially in the lower parts of the monument. However, applied NDT methods and change-deterioration maps indicated that the deterioration as well as neglect and abandonment in the monument are mostly associated with the capillary effect of the flowing water through the structure and the deterioration effect is more apparent in contact points between the building stone and the flowing water. Additionally, in the building stones above the capillary front, the conservation condition is significantly better.
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    Atmospheric and anthropogenic deterioration of the Ivriz rock monument: Eregli-Konya, Central Anatolia, Turkey
    (Springer Heidelberg, 2021) Korkanc, Mustafa; Ince, Ismail; Hatir, M. Ergun; Tosunlar, M. Bahadir
    The aim of this study is to determine the extent of deterioration of the limestone on which the Ivriz rock monument is engraved. This monument is near Aydinkent (Ivriz) village and located 12 km from the Eregli district of Konya. The height of the Ivriz Hittite monument is 4.20 m and its width is 2.40 m. It dates back to the second-half of the eighth century BC. The rocks on which the reliefs are engraved are limestone; the lower parts are brecciated with open cracks, and the upper parts show fewer cracks with smaller gaps. To enable the identification of the characteristics of the rocks on which the figures are located, non-destructive methods were used. Surface humidity, P wave velocity, thermal imaging, and Schmidt hardness measurement were applied to the wall surface of the monument, and mapping studies were conducted. Surface humidity varied between 26 and 58% with the highest values measured in the sections where the cracks are densest. The P wave velocity measured at the rock monument varied between 1.6 and 5.8 km/s, with the lowest values found in the sections where cracks were denser. Schmidt rebound values varied between 18 and 42, with higher values obtained in those sections with fewer effects of deterioration. According to the detailed observations and data obtained from non-destructive techniques (NDT) and laboratory data, the most significant deterioration has resulted from atmospheric conditions and damage by humans. The most common effects of degradation in this area are erosion by water, granular disintegration, cracks, microkarst, black crust, biodegradation (lichen, algae, and higher plants), and vandalism.
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    EVALUATION OF WEATHERING EFFECTS DUE TO SURFACE AND DEEP MOISTURE IN A ROMAN ROCK TOMB: LUKIANOS MONUMENT KONYA (TURKEY)
    (Univ Agean, Dept Mediterranean Stud, 2020) Ince, Ismail; Korkanc, Mustafa; Hatir, M. Ergun
    Water is an integral component of direct and indirect decomposition processes that may lead to the deterioration of stone building materials in cultural heritage. Since the deterioration effects caused by water may cause irreversible problems in the whole monument, the detection of water is extremely important. Although there are many methods of moisture measurement (nuclear magnetic resonance, electrical resistance measuring, infrared thermography, radar, moisture meter) in the literature, there is no study in which deep and surface moisture values are evaluated together in monuments. For this purpose, the Lukianos Monument (Beysehir, Konya-Turkey), which was created by carving on the rock surface, was investigated for a better understanding of the causes and development of the deterioration mechanisms of cultural stone heritage using surface moisture (SM) and deep moisture (DM) meters. It was aimed to determine the behavior of surface and subsurface water in the stone material by applying both methods. For this, firstly, deep and surface moisture data were processed on orthophoto obtained from the photographs of the monument. The P-wave velocity (Vp) test was also performed to determine the deterioration effects caused by water, which is mostly present in the form of moisture in structures on the rock. According to the results obtained from the study, contour scaling type deterioration and lower P-wave velocity values were obtained in parts where low DM values were determined in response to high SM values. The development of biological colonizationwas commonly observed in the regions with high moisture (surface and deep) values.
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    HISTORICAL GRANARIES AT TASKALE (TURKEY) UNDER RISK: A GEOTECHNICAL ANALYSIS
    (Univ Agean, Dept Mediterranean Stud, 2018) Korkanc, Mustafa; Ince, Ismail; Hatir, M. Ergun; Tosunlar, M. Bahadir
    Granaries are bioclimatic conservation structures with various forms using in different countries. In the past, granaries have been an important structure in both the storage and conservation of products (such as like wheat, barley, oats). According to the historical documents, the Taskale village includes the studied granaries have been using as a settlement area since the Byzantine period. Recently, rockfalls have observed on the walls of the northeastern parts of these historical granaries. The geological and geotechnical features of the rock units used in these areas were determined to understand such problems. In the field, the rocks with different colours and textural characteristics have taken into account and sampling has carried out from three different levels. Laboratory studies were conducted for determining the mineralogical, chemical, petrographic and geomechanical properties. The granaries in the region carved in the fossiliferous reefal limestones and clayey-sandy limestones. These limestone levels are more sensitive to atmospheric conditions than the overlaying travertine. The aim of the study is to provide geotechnical data to use in the conservation processes of the ancient Taskale granaries.
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    Intelligent detection of deterioration in cultural stone heritage
    (Elsevier, 2021) Hatir, M. Ergun; Ince, Ismail; Korkanc, Mustafa
    Vision-based periodic examination of the deterioration of stone monuments over time is labour and time intensive. Especially, in cases involving large-scale immovable cultural heritage, the workforce is considerably increased, along with the possibility of occurrence of errors. Any misdiagnoses in the deterioration may cause irreversible structural problems in monuments, and thus, it is necessary to develop alternative examination methods. Computer-vision methods represent an effective solution to eliminate both human errors and difficulties in the field. Therefore, this study aims to adopt the Mask R-CNN algorithm, which is a computer-vision method, to detect and map the deteriorations observed in the Gumus, ler archaeological site and monastery (cracks, discontinuities, contour scaling, missing parts, biological colonization, presence of higher plants, de-posits, efflorescence, and loss of fresco). First, 1740 images were collected from the site, and the model was trained by labelling the distortions in these images according to their types. Later, the model was tested on four outdoor and two indoor views. The developed model achieved an average precision ranging between 91.591% and 100%, and the mean average precision was 98.186%. These results demonstrated that the proposed algorithm can enable mapping to promptly and automatically detect the deterioration in large monuments.