GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione 3.2 559 and the water flow. In order to better understand the stability condition of Roman Bath the area 1 was subdivided in two sub areas labeled respectively zone 1 and zone 2 (Fig. 2a). Fig. 2b shows the electrical resistivity model at eight different depths. It is possible to note the probable ancient drainage system in the first slices (+9m) posed at about 3m in depth (referring to the current living surface). It is characterized by an high resistivity values ranging from about 4000 Ωm to about 5000 Ωm. These values suggest that the system empty and partially collapsed. A low resistivity zone (10-60 Ωm) indicate probable water flow coming from the north. Due to the collapsed ancient drainage system the water path is random and therefore the water diffuses randomly along paths that for centuries was opened in the building. Other high resistivity zones (labelled “C”) are visible on the roof. These zones are probably related to a fractures system. It is possible also to evidence the fault line that crosses the baths. In order to better understand the distribution of the water on the roof a vertical distributions of resistivity are shows in Fig. 2c. Fig. 2c shows the electrical resistivity model at four different vertical sections that crossing the Roman Bath structure. It is possible to note the probable ancient drainage system. It is characterized by an high resistivity values ranging from about 4000 Ωm to about 5000 Ωm. These values suggest that the system empty and partially collapsed. A low resistivity zone (10-60 Ωm) indicate probable water distribution on the roof. Other high resistivity zones (labelled “C”) are visible on the roof. These zones are probably related to a fractures system. Conclusions. The results of the archaeo-geophysical survey at the archaeological site of Sagalassos are presented in this paper. During the summer of 2015, a geoelectrical survey was conducted using Dipole-Dipole array in two areas. In the area 1 results indicates the problematic that affect the structure of Roman Bath. First one there is an uncontrolled water flow from the north hits the wall structure of the baths. ERT Fig. 1 – a) ERT Profiles; b) 3D electrical resistivity distribution in the subsoil; c) 3D iso - resistivity volume.