Akademik Veri Yönetim Sistemi
17th INTERNATIONAL ISTANBUL CONGRESS ON LIFE, ENGINEERING, ARCHITECTURE, AND MATHEMATICAL SCIENCES, İstanbul, Türkiye, 28 - 30 Nisan 2024, ss.392-402
Landslides are one of the natural disasters that cause the most loss of life and property after earthquakes. Landslides occur frequently in many regions of our country, especially in the Black Sea Region. Detecting landslide risk areas in advance will ensure that the damage that may occur in the future can be minimized. In addition to identifying landslide risk areas in advance, it is necessary to investigate the landslide areas and reveal the landslide mechanism. The effects of landslide geometry, landslide toe and groundwater can be viewed in 2D and 3D using geophysical methods.
Within the scope of this study, the physical characteristics of the landslide that occurred in Eğridere District of İzmir Bornova District on February 13, 2019 were investigated with geophysical methods. In order to determine the effect of the landslide boundary and groundwater at shallow depths on the landslide, 6 profiles Active Source Multi-Channel Surface Wave Analysis Methods (MASW), 5 profiles Passive Source Multi-Channel Surface Wave Analysis (ReMi) and spectral magnification in the area where the slide occurs. Microtremor method was applied at 9 points.
5 profiles MASW and ReMi applications applied within the landslide boundaries were evaluated together and level maps were created from Vs velocities. Outside the landslide boundaries, a 1 profile MASW study was carried out to distinguish sliding material and bedrock. In the MASW-ReMi studies, which were applied within the borders where the landslide occurred and evaluated by combining them, information was obtained to a depth of approximately 25 m, and it was observed that the velocity values obtained varied between 207 m/sec and 473 m/sec. As a result of the MASW study applied outside the landslide boundaries, information could be obtained from approximately 35 meters and the obtained Vs velocities were observed to vary between 323 m/s and 867 m/s. As a result of microtremor studies carried out in the landslide area, a spectral magnification map of the study area was prepared and it is observed that the obtained spectral magnification values vary between 1.53 and 3.77. It is observed that the spectral magnification values are high in areas where landslides occur within the study area and where landslides may occur.