Digital terrain model of the Varna and Beloslav Lakes, North Bulgarian Black Sea Coast

Lambev, Todor; Prodanov, Bogdan; Dimitrov, Lyubomir; Kotsev, Iliyan

doi:10.1117/12.2571104

Cited by 7 publications

(2 citation statements)

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“…Two artificially excavated navigation channels connect the lake to Varna Bay. Lambev et al carried out measurements in Varna Lake and determined an area of 15.7 km2, a maximum depth of 21.3 m, a maximum length of 10.5 km and a maximum width of 2.5 km [2].…”

Section: Introductionmentioning

confidence: 99%

Pollution of Varna Lake and possibilities of using the pollutants as resources

Ganchev¹,

Markova²,

Valcheva-Georgieva³

et al. 2023

E3S Web Conf.

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Varna Lake is of great social and economic importance for the city of Varna and the entire region. The urbanisation of the areas surrounding the Varna-Beloslav Lake complex and the accelerated industrialisation around the coastline of Varna Bay have significant anthropogenic pressure on the aquatic ecosystem. An essential aspect is that industrial development, maritime transport and urbanisation are substantial sources of large-scale inorganic and organic pollution with all the resulting negative consequences. Recent measurements show that the surface sediments, which are a source of nutrients for the water body of Varna Lake, are contaminated with heavy metals and oil products. In this paper, we present a quantitative assessment of the degree of contamination with heavy metals (Hg, As, Fe, Cu, Pb) and petroleum products in the upper sediments of Varna Lake and then discuss opportunities for using some of these pollutants as a resource. The exploitation of these resources would bring significant benefits for improving the ecological status of Varna Lake.

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Section: Introductionmentioning

confidence: 99%

Pollution of Varna Lake and possibilities of using the pollutants as resources

Ganchev¹,

Markova²,

Valcheva-Georgieva³

et al. 2023

E3S Web Conf.

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“…The area of Lake Varna is 15.7 km 2 ; its maximum depth is estimated at 21.3 m, maximum length 10.5 km, and maximum width 2.5 km. Natural and anthropogenic forms have been established at the bottom of the lakes (Lambev et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Assessment of pollution with heavy metals and petroleum products in the sediments of Varna Lake

Ganchev¹,

Markova²,

Valcheva-Georgieva³

et al. 2022

Rev. Bulg. Geol. Soc.

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We present the results from the first large-scale study on pollution in the Varna Lake sediments, which was implemented in two preselected zones with significant importance for developing economic activities and urban planning. Based on 140 probes, we developed a digital map of the pollution gradients in these zones. The sediment analysis shows that the pollution levels at specific locations significantly exceed the international standards for contamination with heavy metals and petroleum products. The reported pollution concentrations can be linked to various contamination sources, such as rivers, ports, the chemical industry, and WWTPs (Waste water treatment plants), located on the shores of the lake. The high values of pollution with iron, copper, and petroleum product registered in the sediments of Lake Varna indicate the need for sustainable management of human activities in the area. The presented findings motivate urgent measures for cleaning and improving the ecological situation in Varna Lake, which is an integral part of the ecosystem of the city of Varna and other municipalities bordering the lake. The results of the study indicate that urgent action is needed to address the high risks associated with the observed sediment contamination.

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Seabed Forms and Substrate Mapping of the Chernomorets Coastal Sector, Bulgarian Black Sea

Trendafilova

Dechev

2022

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings

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The intensive development of remote sensing in the marine environment provides excellent bathymetric and substrate mapping opportunities on the southern Bulgarian Black Sea coast. The Bay of Chernomorets is a perfect opportunity to combine data from single-beam sonar, multi-beam sounding and drone imaging for the purpose of seabedforms and substrate mapping. This paper presents the second stages activity of the Project �Multidisciplinary study of Burgas Bay � MidBay. (Composition of a detailed digital model of the bottom relief with analysis of modern geomorphological conditions and archaeological forecasting modelling)� with a scientific goal of creating a substrate map and identification of seabed forms. The studied bay is strongly anthropogenically modified by the port in its southern part. In recent years, systematic studies of the landform changes have shown that the seabedforms, the beach and the shallowest part up to 2 meters in depth have changed. This is the main reason for choosing a solution that allows the 3D reconstruction of a coastal sector of Chernomorets. One of the purposes of the publication is to review the research through echo sounders and unmanned aerial systems along the Bulgarian Black Sea coast and analyse the methodology, equipment, and results obtained. The main task is to use good practices and successful methodology to combine echo-sounding and UAV surveys to derive a modern digital model of the terrain and raster data for the Bay of Chernomorets. Additionally, the process follows the good practices of using UAV and Sonar raster mosaic to detect borders between lithological varieties. The article aims to map seabed substrates in Folk 5 Classes and evaluate the accuracy of UAV-based DSMs, high-resolution orthomosaics and singlebeam echo sounding, which are fundamental for studying the most dynamic coastal landforms along the Bulgarian Black Sea coast.

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Digital terrain model of the Varna and Beloslav Lakes, North Bulgarian Black Sea Coast

Cited by 7 publications

References 0 publications

Pollution of Varna Lake and possibilities of using the pollutants as resources

Pollution of Varna Lake and possibilities of using the pollutants as resources

Assessment of pollution with heavy metals and petroleum products in the sediments of Varna Lake

Seabed Forms and Substrate Mapping of the Chernomorets Coastal Sector, Bulgarian Black Sea

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