Analysis and Mapping the Landslide Hazard in Bulgaria

Ivanov, Petko M.; Berov, Boyko; Dobrev, Nikolai; Varbanov, Radoslav; Krastanov, Miroslav; Frangov, Georgi

doi:10.1007/978-3-319-53498-5_126

Cited by 14 publications

(17 citation statements)

References 3 publications

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“…One of the most important process in the risk assessment requires all hazardous geological processes to be combined into maps (Lakov et al, 2002;Ivanov et al, 2017aIvanov et al, , b, 2020Bruchev, 2018). The geological phenomena having an inherent disastrous potential should be described via the probability of occurrence (experienced hazards and possible hazards) and severity or intensity (experienced hazards and possible hazards).…”

Section: Resultsmentioning

confidence: 99%

Comprehensive methodology for geological risk and multy-risk assessment

Frantzova¹

2021

Rev. Bulg. Geol. Soc.

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Section: Resultsmentioning

confidence: 99%

Comprehensive methodology for geological risk and multy-risk assessment

Frantzova¹

2021

Rev. Bulg. Geol. Soc.

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“…According to the landslide zoning of the Bulgarian Black Sea coast, Primorsko Municipality falls into the southern landslide zone and the subzone of landslides southern from Burgas (Konstantinov et al, 1992;Bruchev et al, 2007;Frangov et al, 2011;Dobrev et al, 2013;Berov et al, 2016Berov et al, , 2020Ivanov et al, 2017bIvanov et al, , 2020. The main destabilizing factors are sea erosion, erosion and fluctuations in groundwaters.…”

Section: Risk Assessment Methodology Applied For Primorsko Municipalitymentioning

confidence: 99%

Risk assessment of geological disaster in the region of Primorsko Municipality

Frantzova

2021

Geologica Balcanica

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Risk assessment methodology is described in detail and applied for assessing the geological hazard for potential landslides and earthquakes. This methodology follows the guidelines of ISO 31010 and the JRC recommendations, and is applied for the first time in Bulgaria. The obtained results have high practical applicability. The flexibility of the methodology allows the final result to be presented as either a risk matrix or risk profiles. It depends on the specific tasks, issues and scientific problems that need to be solved.

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“…Тутракан са регистрирани 13 броя съвременни, стари и древни свлачища ("Геозащита" ЕООД, клон Плевен, МРРБ). Част от тях са стабилизирани, други са с периодични активизации, а трети са с потенциална опасност от възникване на свлачищни процеси (Berov et al, 2002(Berov et al, , 2020Bruchev et al, 2007;Evlogiev et al, 2010;Ivanov et al, 2017Ivanov et al, , 2022. Те са разположени между първата и четвъртата надзаливни тераси на р. Дунав.…”

Section: въведениеunclassified

Influence of geological and hydrogeological settings in assessing the stability of a landslide slope in the Tutrakan area, Northeastern Bulgaria

Angelov¹,

Vasileva²

2023

Eng. Geol. and Hydrogeol.

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The study is focused on the assessment of the stability of the lower part of the right slope of the Danube River. The research area is situated in the town of Tutrakan, Northeastern Bulgaria. The present study investigates the likelihood of activating landslide processes due to construction works on the water supply and sewerage network of the town, as well as the influence of the natural geological and hydrogeological settings of the region. The research area is part of the Danubian Plain. The groundwater level lies between 7 and 26 m below the surface, in the sandy sediments and limestones of the Pliocene that form the semi-confined to unconfined aquifer. They are mainly formed by infiltration of precipitation through the loess layer. The groundwater discharge is carried out naturally and technogenically towards the Danube, through a herringbone system of drains built in the toe of the landslide cirques. The assessment of the slope stability was made for the different hypotheses – natural (momentous – including the existing buildings), constructional (including excavations), primary and specific (including seismic forces) combination of stresses. The different geodynamic models, taking into account the influence of groundwater, the influence of different destabilizing factors and seismic impact, show that the slope, as well as the studied sections of it – the landslide cirques, are in a stabilized state, with safety coefficients (Fs > 1). According to the mechanism of deformation, the landslides are classified as a translational slide, and deep seated according to the depth of the slip zone. They are contemporary and currently active. The study confirms the hypothesis of the origin of the landslide masses in the area, formed as a mixture of loess material and Pliocene clays. The groundwater level is directly related to the current state of the landslide slope stability.

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Analysis and Mapping the Landslide Hazard in Bulgaria

Cited by 14 publications

References 3 publications

Comprehensive methodology for geological risk and multy-risk assessment

Comprehensive methodology for geological risk and multy-risk assessment

Risk assessment of geological disaster in the region of Primorsko Municipality

Influence of geological and hydrogeological settings in assessing the stability of a landslide slope in the Tutrakan area, Northeastern Bulgaria

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