Anatomy of a Landslide: Evaluation of the Importance of Basic Geological Investigations as exemplified in the Kuzulu (Koyulhisar - Sivas, Türkiye) Landslide of 17 March 2005

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dc.contributor.authorGuersoy, Halil
dc.contributor.authorTatar, Orhan
dc.contributor.authorMesci, Bekir Levent
dc.contributor.authorCanbaz, Oktay
dc.contributor.authorPolat, Ali
dc.contributor.authorAkpinar, Zafer
dc.date.accessioned2024-10-26T18:00:47Z
dc.date.available2024-10-26T18:00:47Z
dc.date.issued2024
dc.departmentSivas Cumhuriyet Üniversitesi
dc.description.abstractOn 17 March 2005, a large and complex landslide occurred west of Koyulhisar (Sivas, Turkey). This landslide, mostly comprising debris derived from volcanic rocks and mud flow, moved over the Kuzulu settlement area in the valley in a very short time and 15 people were killed. The Kuzulu landslide zone is not a simple mass movement limited to a single movement. Instead, complexities are introduced by the regional topographic structure and location of the crown and heel zone so that at least 4 other large flow movements occurred in this region between 17 March 2005 and August 2007. One of the most important factors initiating and accelerating this landslide has been the influence of surface and groundwater seepage from melting snow. This seepage has followed the dense pattern of discontinuities and normal fault planes observed in and around the crown region. These waters saturated the profoundly altered volcanic bedrocks with water, and as a result, a slip surface developed between the underlying limestone and weathered volcanic rocks. This was responsible for the catastrophic mass movement. To correctly interpret the causes and consequences of mass movements, where the movement speeds and directions can be monitored in detail using the advanced technological tools available today, detailed geological mapping is essential. There are currently differing interpretations of the development and triggering factors responsible for the Kuzulu landslide. This is primarily because the geological and tectonic structure of the landslide zone and its surroundings have not hitherto been investigated in the necessary detail. In this study, a detailed new geological map revealing the basic geological features of the region has been compiled and the characteristics of the landslide re-evaluated for comparison with previous studies. With the help of Digital Elevation Model (DEM) maps created from the satellite images of the Kuzulu Landslide area before and after the landslide, a total volumetric movement of 10.367.766 m 3 is estimated to have occurred. We calculate that a net 9,372,880 m 3 of material flowed from the area within the landslide boundary. Any assessments of ground suitable for settlement with a view to urban development and planning requires a proper understanding of the geomorphological structure of the surrounding region and the engineering geological properties of the ground. The fact that Koyulhisar district centre is located both in the immediate vicinity of an active fault zone such as KAFZ and on an active landslide area emphasises this issue. Detailed geological, geomorphological, landslide susceptibility, hazard and risk maps are of great importance to prevent or mitigate the damaging consequences of earthquakes and the landslides that they may be motivated.
dc.identifier.doi10.25288/tjb.1373825
dc.identifier.endpage70
dc.identifier.issn1016-9164
dc.identifier.issue1
dc.identifier.startpage51
dc.identifier.trdizinid1224440
dc.identifier.urihttps://doi.org/10.25288/tjb.1373825
dc.identifier.urihttps://search.trdizin.gov.tr/tr/yayin/detay/1224440
dc.identifier.urihttps://hdl.handle.net/20.500.12418/27858
dc.identifier.volume67
dc.identifier.wosWOS:001267257300003
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.publisherTmmob Jeoloji Muhendisleri Odasi
dc.relation.ispartofTurkiye Jeoloji Bulteni-Geological Bulletin of Turkey
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectGeological mapping
dc.subjectgeomorphology
dc.subjectKoyulhisar
dc.subjectKuzulu landslide
dc.subjectvolume calculation
dc.titleAnatomy of a Landslide: Evaluation of the Importance of Basic Geological Investigations as exemplified in the Kuzulu (Koyulhisar - Sivas, Türkiye) Landslide of 17 March 2005
dc.typeArticle

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