YENIKOY LANDSLIDE, PERSEMBE/ ORDU
Landslides are mass movements which are mostly formed by the natural formation process of the terrain however, sometimes they are supported by human interventions. As the landslide mass moves downhill controlled by gravity it harms facilities which are placed over or in front of it and causes loss i...
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| Formato: | article |
| Lenguaje: | DE EN FR TR |
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Fırat University
2019
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| Acceso en línea: | https://doaj.org/article/f49bdee998ab413aaa5e4921107dfb07 |
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| Sumario: | Landslides are mass movements which are mostly formed by the natural formation process of the terrain however, sometimes they are supported by human interventions. As the landslide mass moves downhill controlled by gravity it harms facilities which are placed over or in front of it and causes loss in terms of lives and property. The Black Sea Region consists mainly of terrain which has naturally appropriate conditions in terms of landslide formation. As a matter of fact the Yeniköy landslide which is the subject of this study occurred within the boundaries of the Central Black Sea Section of the Black Sea Region and Perşembe district of Ordu province. This landslide took place on the 19th of August 2011 killing 2 persons and 3 bovines while 1 house and 2 auxiliary buildings were completely demolished and 3 houses were partially destroyed. In addition 2,5 ha of agricultural land was damaged.. In principle the study is based on observations of the terrain. However, information collected from relevant literature and data obtained from the Ordu meteorology station were re-evaluated using CBS programs. The average slope inclination is around 24% in the Yeniköy landslide area. The bedrock consists of Upper Cretaceous age volcano-sedimentary rocks. A debris cover which is 4-5 m in thickness consisting of weathered basaltic agglomerate lies underneath the surface soil cover. The landslide mass consists of this soil and debris cover. A flysch series consisting of marn, siltstone and standstone layers lie beneath the debris cover. The surface of this flysch layer dipping southwest with a 25-30 degree inclination formed the sliding plane during the landslide. The land in the landslide area has been converted into arable fields and hazel nut groves. Domestic sewage and waste water in the landslide area are released into the soil through cesspools which means that the soil particularly in the close vicinity of the houses is usually waterlogged. The area gets rainfall throughout the year and sometimes the rainfall can be heavy (125 mm/day) like it was during the landslide. This rainfall triggers masses which maintain a critical balance status and cause landslides. In order to minimize the damages caused by landslides settlement areas must be selected with care, domestic waste water must be disposed of properly and rainwater must be discharged onto valley floors by the shortest route. |
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