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Presence of coastal structures usually causes significant impacts to adjacent shores, especially when they are composed of sand. Many times, these impacts are associated with inappropriate design due to inadequate consideration of hydromorphological processes and system interactions. As a result, excessive erosion and/or deposition of sediment is observed, which implies costly, and in some cases, continuous maintenance. The study presents an assessment and gives explanation of significant changes in the morphology...

Water and sediments in coastal areas interact at different scales, thus shaping the marine environment and providing physical habitat for ecosystems. Hence, the hydromorphological conditions represent a key aspect of aquatic ecosystems considered in the Water Framework Directive as supporting quality elements (alongside the physicochemical), which are expected to provide the boundary conditions for the biological quality elements. Any alteration in those can reshape the corresponding biological conditions at vario...

Since putting in operation of Chernomorets fishing port (Sozopol municipality, southern Bulgarian Black Sea coast) in January 2016, a number of negative effects have been observed in the area. The disturbance in the existing hydrodynamic balance led to intense coastal erosion and unwanted sand accumulation in the wave shadow area. Additionally, the coastal water quality has deteriorated in the port area. In order to undertake measures to mitigate the observed adverse effects, it is necessary to assess in detail th...

The Marine Strategy Framework Directive (MSFD) is a framework for collective action in the marine environmental policy established by Directive 2008/56/EC of the European Parliament and the Council on 17 June 2008. It calls for EU Member States to create national marine strategies to achieve good environmental status (GES) by 2020 or to maintain it in areas where it already exists. Five factors are laid out in Commission Decision (EU) 2017/848 for GES assessment in regard to a number of broad habitat types, as two...

High-resolution imagery guarantees excellent quality of coastal topographic surveys. Alongside the rapid progress of remote sensing, digital photogrammetry and image processing in recent years using unmanned aerial vehicles (UAVs) provide outstanding opportunities for mapping the coastal zone, including the coverage of difficult-to-access areas, as is the Northern Bulgarian coast. Both spatial planning and integrated coastal zone management require highly accurate and up-to-date geodata, being among the main reaso...

Over 30% of the Bulgarian Black Sea shoreline is characterized as a depositional type of coast. A significant portion of it represents well-formed sandy beaches and dune fields, falling under the protection of the European ecological network NATURA 2000. The coastal sector of the Lower Kamchia Depression hosts the longest beach-dune system on the Bulgarian Black Sea coast called Kamchia-Shkorpilovtsi beach. The main task of the project "Mapping and monitoring of depositional areas along the Northern Bulgarian Blac...

The aerial imagery has a long tradition of use as a surveying method in underwater archaeology. With the recent development of new technologies, its application has become more versatile and more common. This article will present the use of aerial photogrammetry in the archaeological survey of the submerged heritage of Nessebar, ancient Mesambria, on the Bulgarian Black Sea coast. A major application is the generation of a digital bathymetric model (DBM) of the seafloor, which is reliable and accurate approximatel...

The study of the specific nature of the coastal zone requires a combination of a wide range of data from multi-beam and single-beam echosounding, LiDAR scanning, unmanned aerial vehicles, and generation of accurate high-resolution digital terrain models. In recent years, the development of seabed mapping technology has allowed for more precise mapping of the coastal zone. The complex analysis of data on relief, morphostructural units, contemporary tectonic deformations, geological and lithostratigraphical structur...