History and prospects of research of the Black Sea estuaries

Yemelianov, V.O.; Кulаha, Т.B.

doi:10.15407/gpimo2020.03.064

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Аналіз останніх досліджень та публікацій. Лиман Сасик являє собою унікальну геоекосистему, що включає в себе відповідні субсистемисубсистему донних відкладів, аквасубсистему та аеросубсистему, які існують в умовах взаємного впливу [3]. Як було зазначено вище, кожна з них сьогодні вражена та знаходиться в практично критичному стані.…”

unclassified

Heavy metals in the bottom sediments of the Sasyk estuary

Shuraiev,

Kulaha,

Paryshev

2023

Visnyk of V.N. Karazin Kharkiv National University, Series Geology. Geography. Ecology

View full text Add to dashboard Cite

Purpose. The main aim of research is to study the bottom sediments of the Sasyk estuary, in particular, to establish their lithological characteristics and the peculiarities of the distribution of heavy metals in their layers. Method. The research was done with the results of the expedition work carried out in 2018-2019, 31 samples of the bottom sediments of the Sasyk estuary, channels and paleochannels of the Kogylnyk and Sarata rivers, and rocks of the shoreline of the studied reservoir were selected. We carried out sampling along the network of 31 stations from a motor boat using a bottom-grab and orientation by GPS navigation. The content of heavy metals was determined using geochemical spectral emission analysis. Statistical and cartographic processing of the research results was carried out using geographic information systems Mapinfo, QGIS, Global Mapper and Surfer. Also, to establish the possible routes of metal migration, we used the analysis of mesotopolineaments formed according to the NASA SRTM digital terrain model, with the construction of rose diagrams of the main directions of the lineaments. The results. We established that the bottom sediments were represented mainly by grey-black, black, viscous silt, often with an admixture of shell detritus. Less often, they were composed of sand, sometimes muddy with abundant fauna. We also determined the content of heavy metals in the system of bottom sediments, features of their distribution and possible ways of infusing. Thus, in the territory of the Sasyk estuary, heavy metals of the first (Pb), second (Ni, Cu, Cr, Mo) and third (V, Mn, Ba) hazard class are found in high concentrations. The average content of Pb for the bottom sediment system of the estuary is: for sand – 32 mg/kg, for silt – 41 mg/kg. The maximum content for both is 100 mg/kg. The average Ni content is: for sand – 27 mg/kg, for silt – 62 mg/kg. The maximum content for sand is 80 mg/kg, for silt – 100 mg/kg. The average Cu content in the silt of the Sasyk estuary is 81 mg/kg, and 26 mg/kg in the sand. An elevated content of Mn, Ba and Mo was also found in several samples. Оften areas with increased concentrations of metals have a point character. In almost all cases, they are connected to the river systems adjacent to the pond. The distribution of some metals is correlated with the main directions of estuary water circulation. Wastewater is a likely sources of metals entering the estuary geoecosystem. We also assume that the migration of these elements to the pond may occur through tectonic blocks. Scientific novelty. For the first time in recent years, we have carried out expeditionary work on research of the bottom sediments of the Sasyk estuary, along the complete network of the station. We obtained the data on the gross content of heavy metals, and determined their average, maximum and minimum concentrations. For the first time, maps of the spatial distribution of metals were constructed, which made it possible to establish the main regularities of their accumulation in the bottom sediment system of the pond. Practical significance. Pollution of the bottom sediments of the Sasyk estuary with heavy metals is one of the components of today's critical ecological state of the pond, which affects the well-being of the residents of the surrounding areas. The obtained results can be used at the state level to create effective programs for quality management of the resource potential of the estuary.

show abstract

unclassified

Heavy metals in the bottom sediments of the Sasyk estuary

Shuraiev,

Kulaha,

Paryshev

2023

Visnyk of V.N. Karazin Kharkiv National University, Series Geology. Geography. Ecology

View full text Add to dashboard Cite

show abstract

The history of research and status of study of hyperhaline Kuyalnyk Estuary geoecosystem (Ukraine, North-Western Black Sea).

Shikhaleeva,

Yurchenko,

Kiryushkina

2023

Visnyk of v. N. Karazin Kharkiv National University Series "Ecology"

View full text Add to dashboard Cite

There is devoted to the comprehensive analysis of studies of one of the oldest estuaries of North-West Black Sea — the hyperhaline Kuyalnyk Estuary (an analogue of the Dead Sea in Ukraine). The interest for its study is determined by the richness of its mineral and balneological resources. The special attention attracts the valuable sulphide muds, which value, according to preliminary estimates, is about 7 billion dollars. Currently estuary is suffering from an ecological disaster: it is drying up, its morphometric characteristics are changing catastrophically (the water area surface and the depth are decreasing), the brine mineralization reaches 300 ‰ or more, and the salt from the exposed bottom of the estuary is transported to considerable distances, which threatens the salinization of agricultural lands and homesteads of coastal settlements. In that conditions the estuary loses the ability to restore its invaluable natural resources. Comprehensive information on the assessment of Kuyalnyk Estuary state and the state of its resources is extremely important for the development of measures for protection, restoration and preservation of this unique treasury of natural resources and the implementation of strategy for their rational use. We carried out a critical analysis and generalization of Kuyalnyk Estuary geoecosystem research results for the over a nearly 200-year period (1829-2020) for the first time. Here are highlighted the main stages and reflected directions of research, presented their chronology. The research and publishing activities also highlighted. The role and the work of societies members which were created at the Imperial Novorossiysk University (now the Odesa National University named after I.I. Mechnikov) in direction of research into the nature of Odesa estuaries, and in particular Kuyalnyk Estuary, its mineral and balneological resources, are discussed. The contribution of scientific organizations and scientists to development of research on the current stage also analyzed. The main attention paid to the fundamental complex research of the geo-ecosystem of Kuyalnyk Estuary. It shown that the modern period characterized by quite powerful system of data collection and intensive accumulation of knowledge about this unique reservoir. This made possible to generalize the material accumulated over these two centuries, which reflected in the work started in 2018. "Encyclopedia of Kuyalnik estuary" (in 8 volumes) was published by the Physical-Chemical Institute of Environmental and Human Protection of the Ministry of Education and Science of Ukraine and the National Academy of Sciences of Ukraine.

show abstract

History and prospects of research of the Black Sea estuaries

Cited by 2 publications

References 7 publications

Heavy metals in the bottom sediments of the Sasyk estuary

Heavy metals in the bottom sediments of the Sasyk estuary

The history of research and status of study of hyperhaline Kuyalnyk Estuary geoecosystem (Ukraine, North-Western Black Sea).

Contact Info

Product

Resources

About