Structural, geomorphological and geomechanical aspects of the Koyulhisar landslides in the North Anatolian Fault Zone (Sivas, Turkey)

Sendir, Iş& Yılmaz Hüseyin

doi:10.1007/s00254-002-0528-9

Cited by 23 publications

(2 citation statements)

References 3 publications

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“…The record of Fatal Landslides in America between 2002 and 2007 [8] and between 2004 and 2016 [9] exceeds forty thousand occurrences. The high incidence of fatal landslides may be accredited to an increase in water level due to global warming and climate change [10,11], deforestation due to development and urbanization, etc.…”

Section: Introductionmentioning

confidence: 99%

Landslide in parts of southwestern Nigeria

Bamisaiye

2019

SN Appl. Sci.

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Landslides represent "structural failures" with great risk to the environment, and this makes the study of the mechanism of formation of landslides very important. Most parts of the Okemesi ridge are inherently dangerous areas, at high risk of sliding. This research is one of the first detailed geological investigations of landslides in this area. This research evaluates the importance of the lithological, structural and geomorphological factors to landslide activities in parts of southwestern Nigeria with the aim of designing a susceptibility map which is intended to serve as an early warning and mitigation measures. The result revealed that the latest landslide was caused by the release of intensely fractured rocks along adjacent blocks of a fault plane, and prevalent tectonic stress condition set the stage for the landslide, while slope instability in conjunction with prolonged high-intensity rainfall triggered the movement. The most susceptible area of landslide is within the slope angles of between 45° and 75° with an elevation of between 514 and 666 m. The research further revealed that the landslide occurred about 500 m to the road. The landslide-prone location is within the 0-200 m from the hill; hence, human settlements and activities should be sited at least 500 m away from the hill.

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Section: Introductionmentioning

confidence: 99%

Landslide in parts of southwestern Nigeria

Bamisaiye

2019

SN Appl. Sci.

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“…For these reasons, the directions of movement of the landslides generally threaten the settlement areas (Sendir and Yılmaz, 2001). The geological investigation of Koyulhisar has been carried out regionally or locally by various researchers (Terlemez and Yılmaz, 1980;Toprak, 1989;Uysal, 1995;Sendir and Yılmaz, 2002;Duman et al, 2005;Hatiboğlu, 2009). According to these studies, the Plio-Quaternary aged Koyulhisar Formation is the youngest unit in the region.…”

Section: Geologymentioning

confidence: 99%

Geophysical and Geodetical Investigation of A Landslide Area (Koyulhisar-Sivas, Turkey)

ÖZEL

Över

Hastaoğlu

2018

Preprint

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Abstract. This study includes geophysical studies carried out in the last section in the close south of Koyulhisar (Sivas) landslide site. Additionally, the study area is in the most active location where landslide's displacement amount is the highest. The landslide site basically has been examined geophysics (SRT, GPR) and geodesic (GNSS) methods. According to the geophysical results, within ~ 20 m of investigation depth, layers with the average seismic P-wave velocities (VP) of 0.30, 1.00 and 2.00 km/s have been identified. It has been understood that the thickness of the first two layers of these layers from top to the bottom is approximately 3 and 6.5 m, and the last layer with Vp > 2.0 km/s is the bedrock. Furthermore, it has been understood that the depth of the sliding surface which is the upper limit of the bedrock varies between ~ 7–10 m, there are loose units on the sliding surface, the type of sliding is planar sliding, and the direction of sliding is S–SE, the tilt of the layer has the same direction with topography, is SE-oriented and mostly bigger than 50. It was understood that the deformations in the landslide mass were occured from the geological unit, the layer or topography slope and precipitation and the landslide activity can continue in the study area. Thus, it has proven that precipitation and deformations within the layer are effective in triggering the landslide by the geodetic (IDH) observations, and it is understood that they were compatible with the geophysical results. Therefore, the study area contains the risk and the natural hazards, and these threatens the settlement area and the buldings and other constructions there.

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