Erosion of Coastal Slope in the Zelenka locality, Northern Black Sea Coast of Bulgaria

Nankin, Rosen; Krastanov, Miroslav; Ivanov, Petko M.

doi:10.52321/igh.36.1.3

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…Part of the town-from the plateau on the slopes to the sea-consists of a deluvial cover several meters thick (Cheshitev et al 1991). The aragonite sediments (Koleva-Rekalova 1994; Nankin et al 2022;Yaneva et al 2019) of the Topola Formation (N 1 s ), which are characterized by special physical and mechanical indicators, are of great importance for the landslide processes. They are unstable to dynamic impacts.…”

Section: Low Probability Scenario-seismically Induced Landslide (Kava...mentioning

confidence: 99%

Risk assessment of landslides: Low probability scenario for the town of Kavarna, northern Black Sea coast of Bulgaria

Berov,

Frantzova,

Ivanov

et al. 2024

JBGS

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As part of the Reimbursable Advisory Services on Accelerating Resilience to Disaster Risks, the World Bank worked with the Interior Ministry of Bulgaria to develop a proposal for the National Disaster Risk Profile of Bulgaria. The purpose of this document, which is the fourth technical annex to the proposal for the National Disaster Risk Profile, is to provide particular conclusions, information, and techniques that were utilised to evalu-ate the risk of landslides in Bulgaria. For the first time at the national level, landslide risk assessment procedures based on ISO/IEC 31010:2019 Risk assessment techniques are being developed and applied in Bulgaria. The five primary categories in which the results are presented are physical safety, economic security, social well-being, environmental security, and security of tangible assets and critical infrastructure. The uncertainty (confidence) parameter is utilised, and it is subdivided into the following three basic categories: low uncertainty, medium uncertainty, and high uncertainty. The produced results demonstrate consistent applicability to empirical data analysis and real-world situations.

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Section: Low Probability Scenario-seismically Induced Landslide (Kava...mentioning

confidence: 99%

Risk assessment of landslides: Low probability scenario for the town of Kavarna, northern Black Sea coast of Bulgaria

Berov,

Frantzova,

Ivanov

et al. 2024

JBGS

View full text Add to dashboard Cite

show abstract

“…Outside of the tourist season, risk profiles are generated for the summer that take into account the perception of danger. [1,2,9,18,19,20,27] Several official papers and the project's outcomes listed in the references serve as the foundation for the input data used in risk assessment: The National Institute of Geophysics, Geodesy, and Geography at the Bulgarian Academy of Sciences; the Geological Institute at the Bulgarian Academy of Sciences; the EU SCHEMA Project (Scenarios for Hazard-Induced Emergencies Management, Contract No. 030963 with the EU under the FP6 Priorities); and others.…”

Section: Put Into Practice Application To the North East Bulgarian Bl...mentioning

confidence: 99%

Disaster Risk Assessment of North Bulgarian Black Sea Coast

Frantzova

2023

Mining Revue

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The methodology of comprehensive risk assessment for natural disasters has been the subject of recent research. The risk assessment process is thoroughly explained and applied to geological hazards (such as landslides, earthquakes, and tsunamis) that have a potential for calamity. Obtaining a complicated risk level for a few geophysical and geological risks in northeast Bulgaria is the major goal. It has been done to clearly identify the many dangers, their effects, the elements at risk, exposure, and vulnerability, as well as to analyze the secondary events that were generated. For the first time in practice, a thorough risk assessment approach is used, and it incorporates the idea of risk perception. The methodology’s adaptability enables the presentation of the results as either a risk matrix or a risk profile. It depends on the tasks, challenges, and scientific puzzles that need to be solved as well as expert judgment. The outcome showed strong practical applicability and sustainability.

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Spatial distribution of sand dunes along the Bulgarian Black Sea Coast: inventory, UAS mapping and new discoveries

Prodanov,

Dimitrov,

Kotsev

et al. 2023

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Coastal sand dunes are amongst the world’s most sensitive and dynamic landforms. Unfortunately, during the last thirty years, heavy anthropogenic alterations have been observed, encompassing the greater part of the Bulgarian Black Sea coast (BBSC), which has changed the land-sea interactions significantly. As a consequence, the depositional coast has shrunk to 131 km or 25% of the aggregate Bulgarian Black Sea shoreline length. Although our research reveals that 86% of BBSC dunes are included in the Natura 2000 network of protected sites established under the Habitats Directive (Council Directive 92/43/EEC 1992), they are often heavily modified, subjected to environmental vandalism and destroyed due to mismanagement or lack of accurate information and prevention. These facts were the main reason for carrying out an inventory of the Bulgarian Black Sea coastal dune systems in 2021-2022. Our research aimed to identify all dune systems/sand dunes, update their spatial distribution and classify the observed coastal sand dunes landforms along the BBSC. The article demonstrates a successful methodology for combining unmanned aerial systems (UAS), Structure-from-Motion (SfM) photogrammetry, in situ sediment sampling, video imaging and verification and GNSS-RTK ground control points for coastal mapping. As of June 2022, over 97% of the Bulgarian shoreline has been surveyed with this technique, excluding military areas and national security sites. Based on the acquired data, as of 2021, the shoreline length was estimated to be 518.7 km at a scale 1:5000. The integrated UAS approach includes using Digital surface models (DSM), raster orthophotomosaics (OM) and 3D models, based on SfM photogrammetry to analyse the coastal topography, detect dune forms and update their spatial distribution. Throughout the inventory, 46 beach-dune systems were identified along the BBSC, which were divided into 62 dune sectors. The area of coastal dune systems was estimated at 988.21 ha (0.0089% of Bulgaria) and a total length of 73 km (14% of the shoreline). A comprehensive geomorphological analysis of the relationships between landforms morphology, aeolian and morphodynamic processes, vegetation density and type was the basis for the coastal dune landforms (CDLs) or dune systems to be classified into primary (312 ha; 32%) and secondary (676 ha; 68%). Additionally, the CDLs were classified according to Natura 2000 habitats: fixed (grey) dunes (546.27 ha; 55.28%), wooded dunes (222.61 ha; 22.53%), shifting (white) dunes (150.30 ha; 15.21%), embryonic dunes (68.3 ha; 6.91%) and humid dune slacks (0.94 ha; 0.09%). The highest positioned CDLs on the Balkan Peninsula were registered at perched Sozopol Sand Dunes (61 m a.s.l.) and cliff-top dunes at Arkutino (50.2 m a.s.l.). The multi-temporal analysis of photogrammetric DSMs and raster OMs showed the permanent loss of five dune systems in the Pomorie-Burgas-Rosenets coastal sector. The accrued UAS data approach allowed us to identify and map eight dune systems for the first time: Zlatni Pyasatsi (Panorama), Asparuhovo (Varna), Byala, Atanasovska Kosa, Central Beach (Burgas), Chernomorets, Kavatsite (partly) and Rezovo-Kastrich. A high anthropogenic footprint was registered on 50.7 ha (5.1%) of the entire dune surface. In the final stage of the study, human interventions that caused degradation and permanent loss of dunes (12 ha) over the last 15 years along the BBSC were shown. The main causes for dune degradation along BBSC have been documented, such as massive tourism development after the socialist period, road construction, recreational pressure exerted on the dunes, human trampling, lack of designated footpaths in areas with fixed and mobile dunes, off-road vehicles and parking lots (especially at camping sites), dumping of garbage and anthropogenic marine litter on the sand dunes etc.

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Erosion of Coastal Slope in the Zelenka locality, Northern Black Sea Coast of Bulgaria

Cited by 6 publications

References 24 publications

Risk assessment of landslides: Low probability scenario for the town of Kavarna, northern Black Sea coast of Bulgaria

Risk assessment of landslides: Low probability scenario for the town of Kavarna, northern Black Sea coast of Bulgaria

Disaster Risk Assessment of North Bulgarian Black Sea Coast

Spatial distribution of sand dunes along the Bulgarian Black Sea Coast: inventory, UAS mapping and new discoveries

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Erosion of Coastal Slope in the Zelenka locality, Northern Black Sea Coast of Bulgaria

Cited by 6 publications

References 24 publications

Risk assessment of landslides: Low probability scenario for the town of Kavarna, northern Black Sea coast of Bulgaria

Risk assessment of landslides: Low probability scenario for the town of Kavarna, northern Black Sea coast of Bulgaria

Disaster Risk Assessment of North Bulgarian Black Sea Coast

﻿Spatial distribution of sand dunes along the Bulgarian Black Sea Coast: inventory, UAS mapping and new discoveries

Contact Info

Product

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Spatial distribution of sand dunes along the Bulgarian Black Sea Coast: inventory, UAS mapping and new discoveries