Hydrogeological and geotechnical assessments of the Kadifekale landslide area, İzmir, Turkey

Tarcan, Gültekin; Koca, Mehmet Yalçın

doi:10.1007/s002540000170

Cited by 17 publications

(5 citation statements)

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“…There are two kinds of rock mass movements in the area. The first is associated with the clay materials formed as a result of the weathering of andesites and dacites from the volcanics, while the second is associated with the Neogene clayey layers at the base of the volcanics (Tarcan and Koca 2001). Andesites and dacites are weathered to clay minerals and are 5-10 m thick in the stepped structure-forming areas.…”

Section: Methodsmentioning

confidence: 99%

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Landslide susceptibility assessment in the İzmir (West Anatolia, Turkey) city center and its near vicinity by the logistic regression method

2009

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A landslide susceptibility assessment for _ Izmir city (Western Turkey), which is the third biggest city of Turkey, was performed by a logistic regression method. A database of landslide characteristics was prepared using detailed field surveys. The major landslides in the study area are generally observed in the field, dominated by weathered volcanics, and 39.63% of the total landslide area is in this unit. The parameters of lithology, slope gradient, slope aspect, distance to drainage, distance to roads and distance to fault lines were used as variables in the logistic regression analysis. The effect of each parameter on landslide occurrence was assessed from the corresponding coefficients that appear in the logistic regression function. On the basis of the obtained coefficients, lithology plays the most important role in determining landslide occurrence and distribution. Slope gradient has a more significant effect than the other geomorphological parameters, such as slope aspect and distance to drainage. Using a predicted map of probability, the study area was classified into five categories of landslide susceptibility: very low, low, moderate, high and very high. Whereas 49.65% of the total study area has very low susceptibility, very high susceptibility zones make up 11.69% of the area.

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Section: Methodsmentioning

confidence: 99%

“…The degree of weathering changes with depth, and in most areas water moves along fractures and mixes with groundwater. Andesite and dacite blocks lying on the surface move by rotation (Tarcan and Koca 2001). The second type of movement in the landslide areas is very important because of the large-scale damages it causes.…”

Section: Methodsmentioning

confidence: 99%

Landslide susceptibility assessment in the İzmir (West Anatolia, Turkey) city center and its near vicinity by the logistic regression method

2009

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“…The city is an important industrial and cultural centre with the second largest import-export harbour. Geological map of Izmir Metropolitan area was prepared by Tarcan and Koca (2001) (Figure 2). The Upper Cretaceous and Paleocene Bornova Melange rocks exposed in Izmir Metropolitan area mainly consist of conglomerate, micritic limestone, Bornova Flysch and limestone olistolithes in the flysch matrix.…”

Section: Geological Settingmentioning

confidence: 99%

Importance of 3D Visualization for Land Use Planning, Construction and Management of the Karsıyaka Settlement Area (Izmir-Turkey)

Özçelik

Yeniceli

2015

International Journal of 3-D Information Modeling

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Due to recent technological advances in 3D geographic information system (GIS); These 3D visualization technologies have been widely used in urban planning decisions, including: where to build, how to plan for natural disasters, the use of finite resources, how to incorporate sustainable practices, designing for growing populations and other engineering applications. In this study 3D GIS visualization technology is applied to Karsiyaka (Izmir) settlement area to show its applicability for the land use planning, construction and management. This study is carried out in four different stages: In the first stage; 1:25000 scale topographic maps and 1:1000 scale geological maps are digitised in GIS environment and their attribute tables are stored in the GIS databases. In the second stage; sub-surface of the study area was visualized using 3D technologies. This visualisation process is used to assist decision-making for land use planning. In the third stage; and useful soil class zonation maps are performed to be used in further studies. At last stage; after research at this site, the construction applications of Karsiyaka have been multiplied.

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“…Each human activity that impacts the natural environment changes the natural morphology, stress conditions, and natural balance (Alemdag et al 2013(Alemdag et al , 2014, resulting in the triggering of various landslide types. Many landslides throughout the world have been investigated and reported by researchers (e.g., Genc 1993;Fell et al 1996;Hungr et al 1999;Tarcan and Koca 2001;Ferreira 2007;Mantovani et al 2010;Jaiswal et al 2011) andmany researchers (e.g., Fellenius 1936;Janbu 1954aJanbu , b, 1968Janbu , 1973Bishop 1955;Bishop and Morgenstern 1960;Lowe and Karafiath 1959;Morgenstern and Price 1967;Spencer 1967;US Army Corps of Engineers 1970;Sarma 1973;Chung and Fabbri 1999;Tunusluoglu et al 2007;Gurocak et al 2008;Kahatadeniya et al 2009;Nefeslioglu et al 2010;Di Maio et al 2010;Dag et al 2011;Ferrari et al 2011;Zheng 2012;Liu and Zhao 2013;Jeldes 2013;Gu et al 2014;Alemdag et al 2015) have conducted slope stability studies as part of the landslide literature. Different methods have been used in these studies, which were conducted at either local or regional scale according to the type of problem and the properties of the soil.…”

Section: Introductionmentioning

confidence: 98%

Stability assessment of high-steep cut slope debris on a landslide (Gumushane, NE Turkey)

Kaya

Alemdağ

Dağ

et al. 2015

Bull Eng Geol Environ

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The objective of this study was to examine the effects on the stability of slope debris of planned slope excavations around the vicinity of Gumushane Imam-Hatip High School in NE Turkey. To assess the geotechnical properties of slope debris along the determined cross-sections, four exploration boreholes with a total length of 100 m were drilled and undisturbed soil samples were collected. Slope debris is composed of two soil zones and its depth varies between 15 m and 21 m. It was determined from the experimental results that the soil class of the upper zone is CL (low plasticity clay) and CH (high plasticity clay) whereas the soil class of the lower zone is SC (clayey sand) and GC (clayey gravel). Peak cohesions of the upper and lower zones were 26.3 kPa and 10.2 kPa, and their peak internal friction angles were 16°and 24°, respectively. Limit equilibrium (LE) analyses for the slopes were evaluated using Slide v5.0 software for the pre-excavation, post-excavation, and supported cases. The results of LE analyses showed the existence of a landslide along the SW direction; the landslide would extend to cover the whole region if the excavation were to be performed without applying engineering measures. Finally, the precautions to be taken were determined and stability analyses for the supported case were evaluated. These analyses showed that the active lateral forces applied by the proposed retaining walls to the cut slope should be 8325 and 3103 kN, respectively.

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Hydrogeological and geotechnical assessments of the Kadifekale landslide area, İzmir, Turkey

Cited by 17 publications

References 0 publications

Landslide susceptibility assessment in the İzmir (West Anatolia, Turkey) city center and its near vicinity by the logistic regression method

Landslide susceptibility assessment in the İzmir (West Anatolia, Turkey) city center and its near vicinity by the logistic regression method

Importance of 3D Visualization for Land Use Planning, Construction and Management of the Karsıyaka Settlement Area (Izmir-Turkey)

Stability assessment of high-steep cut slope debris on a landslide (Gumushane, NE Turkey)

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