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Studying the Fracture System of a Landslide by ERT Method
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
In contrary to former researches which used to study the sliding surface or the water content of certain layers of a landslide area we investigated the near-surface fracture system of it. It makes possible the delineation of the endangered area and gives information about the inner structure of the landslide. For this aim Electrical Tomography (ERT) measurements were carried out by different geoelectric configurations. Due to the different conditions of the fractures they can be both conductive and resistive ones and even it is possible that a part of them is conductive while the remaining part is resistive in the function of the filling material and the time passed since the last rainfall. This feature and the probably high density of the fractures make the interpretation of the ERT data rather difficult. The results of these arrays were compared to the Pressure-Probe data we got on the same profile. Using the ERT results a lot of fractures were detected and more or less well localised and on the basis of the fractures the research area could have been divided into several domains which are differently fractured. It emerged among others that even in the not-yet sliding area there are fractures that is a part of this area tends to be more and more dangerous, as well.