Sağlık Mahallesi Heyelanı (Ordu, TÜRKİYE)

Yıl 2021, Sayı: 6, 56 - 66, 15.04.2021

İlter Kutlu Hatipoğlu Ali Uzun Halil İbrahim Zeybek Şerif Can Hatipoğlu

https://doi.org/10.46453/jader.811124

Cited By: 1

Öz

Landslides cause loss of life and property from time to time. In Turkey, the Black Sea Region is the region where landslides are seen most frequently. In this study, Sağlık Neighborhood Landslide that occurred on May 15th, 2019 in the Central Black Sea Region was examined. This study aims to investigate the formation of the landslide and to discuss measures that can be taken in order to minimize the damage. For this purpose, area was visited and measurements were performed, soil samples and photos were taken. The region which has a rough terrain, receives precipitation throughout the year. The site has volcanic bedrock and thick debris and ground cover on it. The liquefaction limit of the soil is between 45.7 and 47.8 and the plasticity limit is between 20.51 and 22. Also, turning forests into agricultural areas, opening roads crossing the slopes, additional weights created by houses, water leaking from the sewer network to the ground and vibrations created by passing vehicles are among main causes of landslides. Stress cracks that started to occur in the crown part of the landslide three years ago started to expand on the day of the incident. The authorities who realized this evacuated the houses being under threat. Despite this, 22 buildings were destroyed and 8 hectares of agricultural land were damaged. To prevent damages, it has been proposed to prepare landslide susceptibility maps, to build new settlements away from potential landslide areas and to move residences in high-risk areas to safe places.

Anahtar Kelimeler

Atterberg Limitleri, Sağlık Mahallesi Heyelanı, Ordu, Karadeniz Bölgesi, Türkiye

Sağlık District Landslide (Ordu, Turkey)

Öz

Landslides cause loss of life and property from time to time. In Turkey, the Black Sea Region is the region where landslides are seen most frequently. In this study, Sağlık Neighborhood Landslide that occurred on May 15th, 2019 in the Central Black Sea Region was examined. This study aims to investigate the formation of the landslide and to discuss measures that can be taken in order to minimize the damage. For this purpose, area was visited and measurements were performed, soil samples and photos were taken. The region which has a rough terrain, receives precipitation throughout the year. The site has volcanic bedrock and thick debris and ground cover on it. The liquefaction limit of the soil is between 45.7 and 47.8 and the plasticity limit is between 20.51 and 22. Also, turning forests into agricultural areas, opening roads crossing the slopes, additional weights created by houses, water leaking from the sewer network to the ground and vibrations created by passing vehicles are among main causes of landslides. Stress cracks that started to occur in the crown part of the landslide three years ago started to expand on the day of the incident. The authorities who realized this evacuated the houses being under threat. Despite this, 22 buildings were destroyed and 8 hectares of agricultural land were damaged. To prevent damages, it has been proposed to prepare landslide susceptibility maps, to build new settlements away from potential landslide areas and to move residences in high-risk areas to safe places.

Anahtar Kelimeler

Atterberg limits, Ordu, Black Sea Region, Turkey, Sağlık District Landslide

Kaynakça

• AFAD (2019) Ministry of Interior Disaster and Emergency Management. Unpublished Landslide Data.
• Akkan, E. & Gürgen, G. (1993) Gaga Lake (Ordu). Ankara University, Turkey Geography Research Center Journal, 2: 241-249.
• Anonim (1973) Landslides and Engineering Application (Translators: F. İ. Atalay and N. Bekaroğlu). Ministry of Public Works General Directorate of Highways Publication No. 200.
• Clague, J.J. & Roberts, N.J. (2012) Landslide hazard and risk. Landslides: Types, Mechanisms, and Modeling (Ed. JJ Clague ve D Stead), Cambridge University Press, pp 1-9.
• DMİGM (2019) Aybastı Meteorology Station. Unpublished Measurement Data.
• Dölek, İ. (2008) Applied Geomorphology Study of Bolaman Stream Basin (Ordu). Dissertation, Istanbul University.
• Kjekstad, O. & Highland, L. (2009) Economic and social impacts of landslides. Landslides–Disaster Risk Reduction (Ed. K. Sassa ve P. Canuti), Springer, pp 573-587.
• Korkmaz, H. (2000) Landslides Affecting Transportation in the Central Black Sea Region. Ondokuz Mayıs University, Journal of Science and Letters Faculty, Geography Series, 1(1): 21-46.
• Moradi, S. & Ebrahimi, E. (2013) Relationship between the percentage of clay with liquid limit, plastic limit and plastic index in four different soils texture class. Technical Journal of Engineering and Applied Sciences, 3(8): 697-702.
• MTA (Undated) 1/25.000 Scale Geology Map, Tokat-G38-c2.
• Öner, E. & Çiçek, İ. (1987) Landslide Events and Examples from the Black Sea Coastline. Journal of Geomorphology, 15: 53-64.
• Öztürk, K. (2002) Landslides and Its Impact on Turkey. Gazi University, Journal of Gazi Education Faculty, 22(2): 35-50.
• Uzun, A. (1987) Pınarlı Landslide. Journal of Geomorphology, 15: 91-96.
• Uzun, A. & Uzun, S. (2003a) Landslides Triggered by Excessive Rainfall and Selamet Village Landslide (Güneysu - Rize). Sırrı Erinç Symposium 11-13 September 2003, pp 355-359.
• Uzun, A. & Uzun, S. (2003b) The Effects of Scattered Settlement Texture and Root Changes in Land Use on Landslide Formation in the Eastern Black Sea Coastal Zone. Rural Transportation, Settlement Problems and Solutions Symposium in the Eastern Black Sea Region, 18-20 December 2003, pp 222-244.
• Uzun, A. & Uzun, S. (2005) Landslide problems in the coastal zone of the Eastern Black Sea region. The International Electronic Conference, Natural and Antropogenic Catastrophes.
• Uzun, A., Zeybek, H.İ., Bahadır, M. & Hatipoğlu, İ.K. (2016) Yeniköy Landslide, Persembe/ Ordu, The Journal of Academic Social Science Studies, 50: 247–259.
• Yalçın, A. (2007) The effects of clay on landslides: A case study. Applied Clay Science, 38 (1-2): 77-85.
• Yalçın, A. (2011) A Geotechnical Study on the Landslides in the Trabzon Province, NE, Turkey. Applied Clay Science, 52 (1-2): 11-19.
• Yılmaz, C., Uzun, A. & Zeybek, H.İ. (2012) Korgan (Ordu) District Center Landslides. National Geomorphology Symposium 2012, pp 382-394.