Visnyk of Taras Shevchenko National University of Kyiv-Geology最新文献

{"title":"LITHOLOGICAL AND MINERALOGICAL STRUCTURE OF ACCUMULATIVE BEACH DEPOSITS OF THE BLACK SEA DANUBE-DNIESTER SEGMENT","authors":"V. Nesterovskyi, M. Deiak, А. Tarnovetskyi","doi":"10.17721/1728-2713.97.01","DOIUrl":"https://doi.org/10.17721/1728-2713.97.01","url":null,"abstract":"The investigations of accumulative-sand deposits of the Black Sea coastline on the area from the village Liman (Katranka spit) to the village Karolina Bugaz (Odessa region) have been carried out. The length of the coastal line in the study area is close to 85 km. There are a lot of beach areas: spits, beach breaks, beaches on the shoreline. 35 samples were taken and analyzed from all types of beach depressions by the same methodology during the summer period. The sampling was carried out at all accessible for sampling places of beach deposits from the middle part of the near-shore beaches (between the water level and the shore) and at a distance of 5–7 m from the water edge on the headlands and spits in the period when there are no storms. For this purpose we used standard plastic containers with a capacity of 1 liter. The samples were taken from a depth of 30 cm from the surface with a stripping area of 30×30 cm. At each point the description of the coastal zone structure and the character of beach deposits were carried out, which were recorded in the logbook and were connected to the coordinates by GPS system. Granulometric and mineralogical analysis was carried out. It was determined that fractions 0,25–0,5 mm prevail in the granulometric composition among all types of beach deposits, which makes 66 %, and 0,1–0,25 mm – 30 %. In the smallest quantities there are coarsegrained and aleuro-pelitic fractions. The main places of localization of drilled-grained psammite and aleuropelite fractions are the areas with low influence of coastal tidal processes. However, during the periods of increased hydrodynamic activity (spring-autumn), additional resuspension of material takes place, which leads to displacement of other fractions from the deposits and their transfer to the sea side. Beach sediments are 90–95 % quartz. Others are calcite, feldspar, technogenic substances. Ore minerals are represented by magnetite, lignite spheroids, ilmenite, acerbic garnets, stavrolite, actinolite. The main sources of terrigenous material for the formation of beach deposits are the underwater bench, the Dniester river runoff, and coastal abrasion. Decisive in the distribution of sediments is the direction along the coastal current in the direction from Odessa city towards the delta of the Danube","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"17 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90374714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESULTS OF GEOPHYSICAL MONITORING OF THE DEVELOPMENT OF THE HORIZON PK-2 OF THE PODKIRMAKINSKY SUITE OF THE NEFT DASHLARY FIELD","authors":"S. Gahramanli","doi":"10.17721/1728-2713.99.04","DOIUrl":"https://doi.org/10.17721/1728-2713.99.04","url":null,"abstract":"The article is devoted to the study of the current state of development of the second horizon of the Podkirmakinsky suite (PK-2) of the Productive stratum (PS) of the Neft Dashlary field, which has been in operation for more than 60 years. The results of the study by the method of complex areal interpretation of geophysical survey data of wells and geological and field information are presented. Three-dimensional geo models, built on the basis of petrophysical parameters obtained after the interpretation of geophysical and geological data using the DV Seys Geo program are given in the article. The results of the analysis of the state of water impact are presented, the values of the oil saturation factor during well drilling are summarized, the values of the current oil saturation factor are calculated taking into account the extraction of oil, the results of studying the nature of saturation of reservoirs in the context of production wells by the method of pulsed neutron logging (PNL), as well as a comparative analysis of these values along the horizon PK-2 of the PS of the Neft Dashlary field.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88363466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"COMPARATIVE ANALYSIS OF HYDROTHERMAL HEAT PUMP INSTALLATIONS OF CLOSED AND OPEN TYPES WITH DIFFERENT SOURCES OF LOW-POTENTIAL ENERGY","authors":"O. Zurian, A. Barilo","doi":"10.17721/1728-2713.96.13","DOIUrl":"https://doi.org/10.17721/1728-2713.96.13","url":null,"abstract":"The article is devoted to a new direction of using the waters of the upper aquifers and open reservoirs for heat and cold supply of residential and public buildings and structures. The theoretical analysis of technologies of construction and features of use of natural accumulators of thermal energy in aquifers is carried out. The general schemes of construction of hydrothermal power systems of closed and open type are described. The hydrothermal experimental heat pump power system developed and constructed at the Institute of Renewable Energy of the National Academy of Sciences of Ukraine consisting of a heat pump and two wells with a depth of 49.5 m and 57.5 m, through which water is pumped or pumped from the aquifer, is presented. The geomorphological, geological and hydrogeological conditions of the study site are analyzed. The peculiarities of the formation of groundwater reserves of the productive horizon are described. Further directions of hydrogeological observations have been determined. The efficiency of the hydrothermal heat pump energy system of the open type is scientifically substantiated. Research methods are described. The characteristics of the measuring equipment and the software which was used for archiving and visualization of the data received in the course of carrying out research work are resulted. The results of experimental researches are presented. A comparative analysis of the efficiency and investment attractiveness of the hydrothermal system of open and closed type, where low-potential thermal energy of water is used as a renewable primary source of thermal energy for the operation of the heat pump was carried out. It is established that the use of renewable low-potential ground energy for the operation of geothermal energy systems is widely used in environmentally safe and economically attractive energy systems. However, the use of hydropower potential in hydrothermal energy systems is not widely used, despite the high technical and economic performance. It is proved that the existing hydrothermal systems are not always adapted to the operating conditions and location of the facility. There is no method of designing open-type hydrothermal systems, methods of conducting preliminary hydrogeological studies of the area planned for the installation of these systems and methods of calculating the parameters of the storage medium. The data obtained during the study are of great scientific and applied importance in the design of hydrothermal energy heat pump systems. In addition, there are prospects for further research into the possibility and effectiveness of using the aquifer as a natural heat accumulator to stabilize the generation of energy from renewable sources, regardless of climatic conditions and time of year.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"76 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86615350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EXPERIENCE OF ISOTOPE TECHNOLOGIES APPLICATION TO STUDY CHANGES IN DEEP-WATER POTABLE AQUIFERS STATE WITHIN KYIV IN CONDITIONS OF LONG-TERM OPERATION","authors":"O. Koshliakov, T. Koshliakova, O. Dyniak, I. Koshliakova","doi":"10.17721/1728-2713.98.10","DOIUrl":"https://doi.org/10.17721/1728-2713.98.10","url":null,"abstract":"The presented research is devoted to study and establishment of the spatiotemporal change of tritium content in groundwater of CenomanianCallovian groundwater complex in Kyiv and the causes of these changes in order to identify water exchange features and hydraulic interaction between shallow and deep aquifers, as well as between groundwater and surface waters. Due to the excessive use of groundwater, depressive surfaces of hydrodynamic pressures have formed, aquifers are transforming from pressure head to pressureless, and there is a danger of downward filtration and contamination of potable groundwater. Also, one of the effects of these depressions formation is deterioration of water quality. However, to study the conditions of the qualitative composition formation of deep potable aquifers and to identify the causes of changes in groundwater status is a difficult and responsible task at the same time. Methods of isotopic hydrogeology are among the main scientific methods used to track the peculiarities of groundwater movement and assess their age. The new data obtained by isotopic methods help to control water resources and allow to make such decisions that will bring socio-economic benefits. The obtained data of tritium content in groundwater of Cenomanian-Callovian groundwater complex, clearly presented in the form of maps, allow to make informed decisions on sustainable resource management, and regular monitoring of chemical and isotopic composition of groundwater reveals mechanisms of recharge and sources of pollution, which were not taken into account before. The results obtained by the authors through statistical and spatial analysis of tritium content in groundwater during 2014-2017, indicate that currently within the territory of Kyiv there is a positive trend towards a slow gradual return of Cenomanian-Callovian groundwater complex to its natural state.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"20 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84472639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MAGNETIC MINERALOGICAL ANALYSIS OF SOILS AS A PART OF THE INTEGRATED GEOLOGICAL AND GEOPHYSICAL MODEL FOR THE HYDROCARBON PROSPECTING","authors":"О. Menshov","doi":"10.17721/1728-2713.97.05","DOIUrl":"https://doi.org/10.17721/1728-2713.97.05","url":null,"abstract":"Magnetic minerals form or alter in the presence of hydrocarbons, making them a potential magnetic proxy for identifying hydrocarbon migration pathways. We concentrate in the precision magnetic mineralogical analyzes to understand what magnetic minerals in soil from the hydrocarbon fields are responsible for the magnetic signal. To illustrate the results of our studying, we consider the study area of the hydrocarbon deposits near the village Balabanivka, Bogodukhiv district, Kharkiv region. A collection of soil samples is represented by deep medium-humus chernozems. The thermomagnetic analyzes, hysteresis parameters, and isothermal remanent magnetization curves (IRM) were studied for the samples collected near the well (point PR 28) and at the area located out of the hydrocarbon influence zone (point PR 0403). To study the thermomagnetic parameters, different types of the magnetization and magnetic susceptibility (MS, χ), and hysteresis loops we used the Variable Field Translation Balance (VFTB) instrument. The results are confirmed by the highest values of the gas geochemical parameters. The MS variations at temperatures ranging from 200 to 400 ˚C may reflect the presence of either iron sulphides or maghemite. The magnetite occurs for all soils. The wasp-waisted hysteresis loops identified either a mixture of two magnetic minerals (magnetite and hematite) and the admixture of the superparamagnetic and larger grains of the same minerals.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"33 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85398361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"POLOGIVSKIY KAOLIN DEPOSIT: GEOLOGY, MINERAL AND CHEMICAL COMPOSITION, TECHNOLOGICAL PROPERTIES","authors":"L. Datsenko, M. Hanchuk, Y. Chebanova, S. Malyuta, O. Mazykina","doi":"10.17721/1728-2713.97.10","DOIUrl":"https://doi.org/10.17721/1728-2713.97.10","url":null,"abstract":"The area of the Pologivskiy deposit of kaolins and refractory clays is located on the border of two geological regions: the Azov crystalline massif and the Konksko-Yalynska depression. Precambrian crystalline rocks and sediments of the Cretaceous, Paleogene, Neogene, and Quaternary systems take part in the geological structure of the district. The geological structure of the district is based on the results of field exploration (23–25) and geological surveying works. Deposits of the Quaternary system are widespread in the territory and are similar to mantle on the underlying rocks. The lower border of the Quaternary system is formed at the base of the Berezanskiy climatolite in accordance with the Geological Map of Ukraine legend (the scale 1:200 000) of the 1996 Central Ukrainian series. The underlying rocks are red-brown Pliocene clays in most parts of the territory, in the rest there are rocks of crystalline basement of Cretaceous, Paleogene and Neogene systems. The thickness of the Quaternary deposits is 10–20 m. Deposits of the Novopetrivska Neogene suite are productive for the extraction of clays and kaolins, in the base of which the undivided deposits of the Upper Eocene (Kyivska suite) and Oligocene (Kharkivska suite) lie. These are coastal-marine deposits – marls, calcareous clays, siltstones, weakly cemented sandstones and glauconite quartz sands. The total thickness of the Kyivska and Kharkivska suites varies from 0,0 to 60–70 m. Clays and kaolins are characterized by almost the same mineral composition. Most of them are composed of fine-grained kaolinite, and quartz predominates among impurities. Accessory and ore minerals are represented by zircon, rutile, ilmenite and hematite. Quartz is present in clays and kaolins in the form of rolled, semirolled and unrolled grains. High-quality aluminosilicate products are obtained from the kaolins of the deposit. Pologivskiy kaolin can be used to make chamotte without the clay addition, as well as a binder. The ratio of chamotte and binder is 80–20 %. The refractories obtained in the laboratory meet the requirements of high density for Class A blast furnace bricks and other products of appropriate determination. Pologivskiy clays are recognized as suitable for the production of 100 % refractories, as well as a binder component instead of ChasovYarska clays. Products made entirely of semi-acid clay meet the requirements for semi-acid refractory products of class B. Pologivskiy kaolins and clays have long been used in refractory, machine-building, ceramic, cement and other industries.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78455317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GEOLOGICAL SIGNIFICANCE OF SEISMIC REFLECTIONS IN THE SEDIMENTARY COVER OF THE EASTERN PART OF THE ABSHERON-PREBALKHAN RIDGE","authors":"M. Abdulla-zade","doi":"10.17721/1728-2713.98.07","DOIUrl":"https://doi.org/10.17721/1728-2713.98.07","url":null,"abstract":"The Absheron-Prebalkhan tectonic zone, often called as the Absheron-Prebalkhan ridge, is a link between two large oil and gas basins of the world, which differ in the genetic level of the basement, i.e.: the South Caspian (SCB) and the Middle Caspian basins (MCB). The considered area has been completely covered by detailed seismic and gravity surveys over the past decades. The article presents material illustrating the information content of seismic sections in different parts of the region, which are characterized by different seismogeological conditions. As a result of the analysis of the latter, the author specified and determined four seismic horizons: SH-A (Akchagyl), SH-I (tops of RS), SH-II (horizon VIII) and SH-III (lower RS) based on the dynamic expressiveness, length, and resolution of the record. The tracking quality of these horizons is not the same. The identification of seismic intervals, which correspond to structural levels based on objectively determined seismic parameters, such as the configuration and relative position of reflections, their continuity, as well as the amplitude and frequency of seismic waves were the basis for seismic stratigraphic analysis of the wave field. The compiled schematic structural maps show the geological structure of the red-colored strata and Akchagyl deposits and the correlation of the structural plans of the latter clearly. Comparison of complex geological and geophysical materials allows to determine the character of the distribution of lithofacies features of RS deposits.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"13 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87528721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EXOTIC METAMORPHIC SCHIST FRAGMENTS IN THE OLIGOCENE DEPOSITS OF THE SILESIAN NAPPE (UKRAINIAN CARPATHIANS)","authors":"M. Tsar","doi":"10.17721/1728-2713.97.02","DOIUrl":"https://doi.org/10.17721/1728-2713.97.02","url":null,"abstract":"The study aims at analyzing the petrographic composition of exotic metamorphic schist clasts in the Oligocene deposits filling the Silesian Nappe in the south-western part of the Ukrainian Carpathians and reconstructing their possible source area. The methodology includes petrographic, sedimentological and comparative geological methods. To achieve this goal, field research was carried out along the first right tributary of the Hysnyi Stream (the village of Uzhok, Velykobereznyanskyi district, Transcarpathian region) and petrographic analysis of the selected samples of the exotic metamorphic schist clasts included in the Oligocene debris-flow deposits was performed. The results of microscopic studies showed that these exotic rocks are represented by mica-quartz schist and garnet-muscovitebiotite-plagioclase-quartz schist with a low content of chlorite, carbonate and epidote. Mineral composition and structure/texture features suggest the rocks were metamorphosed under green schist and epidote-amphibolite facies. Similar exotic rock fragments were identified by Polish scientists in the south-eastern part of the Polish Carpathians in the Silesian Nappe, where possible source area of the exotic rocks is related to the Bukowiec Paleo-Ridge, which had been located between the Dukla and Silesian basins of the Carpathian sedimentary realm. Scientific novelty. For the first time, the petrographic composition and textural and structural features of the exotic schists fragments included in the Oligocene deposits of the Silesian Nappe in the Ukrainian Carpathians (area of the village of Uzhok, Ukrainian Carpathians) are described. These schists are similar to the exotic rocks included in the Oligocene deposits of the Silesian Nappe in the Polish Carpathians, which may indicate the same source area.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79924684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESERVOIR PROPERTIES AND PROSPECTIVES OF LOWER PLIOCENE SEDIMENTS IN THE UMID AREA OF THE BAKU ARCHIPELAGO","authors":"G. Nasibova, K. Mukhtarova, R. Narimanov","doi":"10.17721/1728-2713.96.07","DOIUrl":"https://doi.org/10.17721/1728-2713.96.07","url":null,"abstract":"The objective of this study is to investigate and analyze the reservoir properties of the Lower Pliocene sediments of the Baku Archipelago Umid area and its oil and gas potential. One of the latest studies in the Umid area was geological assessment of reservoir parameters for calculation of hydrocarbon reserves. The earlier obtained results made it possible to more reliably calculate hydrocarbon reserves and plan prospecting and exploration works in the right direction. Large gas condensate reserves were identified in 2009 in horizons V and VII of the Productive Series (PS). Thus, well 10 produced 1.2 million m3/day of gas and 150 tons of condensate from the depth interval of 6340-6356m. Considering that hydrocarbon fields of the South Caspian depression (SCD) are, as a rule, multilayered, this is a reason to predict presence of hydrocarbon accumulations in deeper strata as well. Variation patterns of reservoir properties, such as grain composition, carbonate content, porosity, permeability, density, propagation velocity of ultrasound waves in rocks were not comprehensively investigated in the previously conducted studies. The article studies impact of the structural and tectonic properties of the Umid uplift of the SCD Baku archipelago upon formation of a mud volcano on the southeastern periclinal subsidence. Taking into account impact of compressional stresses on the position of the fold vault and the crater of the mud volcano in connection with the syndepositional development of the uplift, a recommendation on the location of prospecting wells to deeper horizons is substantiated. Formation of reservoir properties of rocks is a function of tectonic stresses arising in them. Occurrence of secondary reservoir properties in rocks is highly probable in tectonically active zones. There is a stable inverse relationship between reservoir properties, carbonate and clay content, and a direct one - with the degree of grain sorting that make up the rocks. The issues considered in the article indicate a high probability of presence of hydrocarbon accumulations here in deeper horizons of the sedimentary section. In the future, based on our studies and geological and geophysical methods, it will be possible to thoroughly assess the prospects of deep-lying stratigraphic units of this area, and those identical to it.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"121 ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72441437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASSESSMENT OF THE FILTRATION COMPONENT OF THE WATER BALANCE OF LEBEDYNE LAKE (SUMY REGION)","authors":"O. Koshliakov, O. Dyniak, D. Chomko, I. Koshliakova","doi":"10.17721/1728-2713.99.09","DOIUrl":"https://doi.org/10.17721/1728-2713.99.09","url":null,"abstract":"Quantitative analysis of the relationship between surface and groundwater in the area adjacent to Lebedyne Lake (Sumy region) is presented. Preliminary studies do not explain the role and quantification of groundwater runoff in lake level fluctuations. The solution to the problem is proposed by the authors based on the calculation of water balance. The article presents the results of research of hydrogeological conditions of the territory near the lake and the results of quantitative assessment of the underground component of the water balance. It has been established that the level regime of Lebedyne Lake is determined by meteorological factors, terrain and conditions of interconnection of surface and groundwater (primarily groundwater). It was also found that groundwater in alluvial deposits in the area adjacent to the lake is separated from the aquifers below, a thick layer of waterproof rocks. Therefore, the existing long-term operation of the mentioned aquifers and complexes for the purpose of centralized water supply cannot be a direct cause of changes in the natural water balance of groundwater and lakes. Also, low anthropogenic pressure in the surrounding area cannot be considered a factor that significantly affects the natural water balance. Groundwater supply in the study area is due to infiltration of precipitation and the flow of surface water from the lake into the groundwater. Changing the water level in the lake very quickly leads to a change in the water level in the soil aquifer, and vice versa. According to calculations, the total loss from the lake to groundwater supply is about 207.1 m3 /day or 75600 m3 /year. The obtained results are the basis for scientific substantiation of designing a system of local monitoring of groundwater status in the area adjacent to Lebedyne Lake.","PeriodicalId":42798,"journal":{"name":"Visnyk of Taras Shevchenko National University of Kyiv-Geology","volume":"58 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73520297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}