- Home
- Conferences
- Conference Proceedings
- Conferences
Geoinformatics
- Conference date: May 11-14, 2021
- Location: Online
- Published: 11 May 2021
121 - 140 of 154 results
-
-
Estimating long-term spatio-temporal variations of urban vegetation using Landsat time series: a case study of Kyiv city, Ukraine
More LessSummaryVegetation contributes significantly to the sustainability of urban environment and the well-being of city dwellers. For this reason, sustainable evidence-based urban policies require spatially explicit information on the change of vegetation cover in cities. This study estimates vegetation changes during active growing season from 1984 to 2020 for the city of Kyiv, Ukraine, using long-term Landsat data archive. During the study period of 37 years, for 38.9% of the study area significant long-term trends in vegetation cover are registered. For the entire study area NDVIs demonstrate a mean annual increase of 0.004±0.004 with prevailing positive trends. The negative changes of vegetation are localized in the central and western parts of the city relate to the processes of urban densification and urban sprawl. Within large peripheral forested areas, changes are positive with possible contributions from ecological succession and from an increase in the duration of the active growing season. Thus, remote sensing time series-based approaches for assessing changes in various environmental parameters could be of great use for developing spatially accurate and data driven urban planning policies and climate change adaptation measures.
-
-
-
Creation of a database of geoinformation monitoring of forestry lands (southwest part of Poltava region, Ukraine)
Authors N. P. Halchenko, S. P. Lashko, N. Ye. Stoiko, V. I. Kozar, L. M. Kozar and O. M. KliukaSummaryIt is developed and filled with information a database of geoinformation monitoring of land of Kryukiv forestry of the SE «Kremenchuk forestry». The information basis is materials of forest management 2019. Software basis is GIS «MapInfo Professional». Peculiarities of the study territory are: 1) its location on the coast (in the floodplain) of the Dnipro river; 2) finding within a regional landscape park «Kremenchuk Plavni»; 3) mainly environmental-protection and recreational and health-improving functions of forests; 4) very dismembered relief of the territory, with grinding on dry land (including islands) and water areas; 5) diverse composition of breeds of forest and their age. The geoinformation system contains 49 attributes that are combined in 7 basic classes of attributes (the tract; quarter; division; detours; road network; settlements; hydrography). In particular, the class of attributes Division combines 21 attributes, including the attributes of the Class of aesthetic assessment, Recreational characteristics, Class of stability, Stage of digression, etc. The productivity of the system was confirmed by the creation of thematic maps of the «Hrabske» tract (map of forests according to the dominant breeds of trees and map of forests by age-old groups of trees).
-
-
-
GRAVIMETRIC SURVEY AND GRAVIMETRIC DATABASE IN UKRAIN “Dniprogeofizika” during 2000–2011 carried out works on collection, analysis and formation of an electronic gravimetric data base (GDB) of the territory of Ukraine. Based on the results of the work carried out, a systematization of the materials of all conditional gravimetric surveys in scales of 1:200000 – 1:1000 was carried out. The database was created for the purpose of systematization, reliable storage and operative application of digital attributes of gravimetric surveys of the last years with a possibility of construction of gravimetric maps of various territories and scales. Information from the database makes it possible to study both the general structure of individual tectonic structures, and to perform detailing to obtain additional information about the structural features of each element. As an example, materials on the study of the engineering and geological conditions of the southern industrial zone of Kryvbas are given. The use of the GDB allows to correctly supplement the picture of the gravitational field obtained from individual profiles when constructing multi-scale spatial maps and to reflect more detail the structural features of the upper part of the earth’s crust.GRAVIMETRIC SURVEY AND GRAVIMETRIC DATABASE IN UKRAIN
Authors V. Svistun and P. PigulevskiySummaryDnipropetrovsk Geophysical Expedition (DGE) “Dniprogeofizika” during 2000–2011 carried out works on collection, analysis and formation of an electronic gravimetric data base (GDB) of the territory of Ukraine. Based on the results of the work carried out, a systematization of the materials of all conditional gravimetric surveys in scales of 1:200000 – 1:1000 was carried out. The database was created for the purpose of systematization, reliable storage and operative application of digital attributes of gravimetric surveys of the last years with a possibility of construction of gravimetric maps of various territories and scales. Information from the database makes it possible to study both the general structure of individual tectonic structures, and to perform detailing to obtain additional information about the structural features of each element.
As an example, materials on the study of the engineering and geological conditions of the southern industrial zone of Kryvbas are given. The use of the GDB allows to correctly supplement the picture of the gravitational field obtained from individual profiles when constructing multi-scale spatial maps and to reflect more detail the structural features of the upper part of the earth's crust.
-
-
-
Optimization of underground gas storages exploitation as result of time-lapse gravity measurements and 4d interpretation – case study of Dashava UGS
Authors O. Petrovskyy, T. Petrovska, A. Trachuk and R. BojkoSummaryUkraine has 30 bcm active capacity in 12 underground gas storages (USG). The safe and effective performance of UGS may be base on the understanding of the changes in the properties of the storage reservoirs. Dynamic 4D models of the density of rocks, volume, and gas pressure in place for multilayer reservoirs on the base of time-lapse gravity measurements and interpretation workflow discussed and summarized. For creating of 4D model of rock density changing proposed to use 4D inversion of time-lapse gravity data. Prediction of the location of dynamic reservoirs that takes the most of the working and cushion gas on the different stages of exploitation (injection - withdraw) proposed. Relations between the changing of the rock density and changing of the volume and pressure of gas were established. Calibration of 4D models of volume and gas pressure to the industrial parameters of USG allowed to estimate the volume of working gas and determine stagnant zones and gas migration pathways. New workflow for the building of 4D models of volume and gas pressure in gas reservoirs on the base of time-lapse gravity measurements and 4D gravity inversion proposed for optimization of exploitation of UGS.
-
-
-
Differences in the assessment of vegetation indexes in the EO-Browser and EOS landviewer services (on the example of Lutsk district lands)
Authors M. A. Fedoniuk, I. P. Kovalchuk, V. O. Fesyuk, R. V. Kirchuk, I. M. Merlenko and S. P. BondarchukSummaryThe paper considers the differences in the display of vegetation indices in the services EO-Browser and EOS LandViewer for selected key areas in the Lutsk district (Volyn Upland, NW Ukraine). A sample of satellite images with different cloud filters was evaluated for the period 2019–2020. The number of images acceptable for analysis in different months of the year is determined.
The difference between the maximum, minimum and average NDVI values, which are calculated by both services, is determined. In most cases, smaller values are typical for calculated indexes by EOS LandViewer. Despite the significant difference in individual unit values (up to 30–50%), the averaged deviations were predominantly less than 10%. For plains with flat terrain, the difference between NDVI values for both services is much smaller than for areas with complex topography. The combined use of both services will create the most effective analysis of vegetation indexes. Effective analysis is possible by using the features identified in this study.
-
-
-
Water budget elements of the Siverskyi Donets River Basin in different water runoff periods
Authors H. Bolbot, V. Grebin, O. Obodovskyi and S. SnizhkoSummaryPrecipitation and air temperature are the main characteristics of climate change. They have a significant impact on the course of long-term fluctuations of river runoff, which is why their changes are discussed. To analyse the trends of changes in climatic and hydrological characteristics (average monthly air temperature, average monthly precipitation, average monthly water runoff) considered the period 1960–2018. The methods of mathematical statistics and the method of difference integral curves were used. It was revealed that under the influence of present climate change there was a redistribution of hydrometeorological characteristics during the year. The shift of annual maximums of air temperature, precipitation, and runoff is revealed.
The assessment of hydrometeorological characteristics for the territory of the Siverskyi Donets Basin revealed that the trends of their fluctuations and distribution during the year have undergone significant changes in the present period.
-
-
-
Optimization of GIS modules for processing data of gravity monitoring of subsoil in the Republic of Kazakhstan
Authors A. B. Nazirova, Y. I. Dubovenko, F. N. Abdoldina and M. P. KuzminetsSummaryPurpose. The work of a GIS shell with a web interface is analyzed aimed to support oil-and-gas reservoirs during its development by processing the data from gravity variations monitoring. The shell is implemented based on Post¬GIS and tested on the example of processing monitoring data for one oil and gas reservoir.
Method. Data processing involves a number of procedures, such as data averaging along the measurement profile by the moving average technique with the calculation of residual local anomalies, the analytical approximation of the gravity curve by a trend, the calculation of the residual field and differentiation (i.e. calculation of its horizontal and vertical gradients). Data modeling means the solution of direct gravimetry problems by the fitting. To optimize the model, mathematical models of the medium were calculated using the simulated annealing technique.
Results. The GIS shell GravGIS has been developed to solve applied problems of processing monitoring data for oil-and-gas reservoirs of Kazakhstan. It provides for the calculation of gravity transformants such as first and second derivatives, horizontal and vertical gradients, mathematical norms, etc. For modeling the oil-and-gas reservoir in this shell, GeoM computing unit is introduced for solution of direct problems of gravimetry. A 1-D solution to the problem by the method of simple iteration was developed. Solutions of direct problems of gravimetry by the simulated annea¬ling technique are tested for gravitating objects specified by elementary approximating bodies (sphere, ledge, hori¬zontal and vertical prism, etc.) and are consistent with solutions of these problems by other methods.
Practical value. The system allows combining data from monitoring gravity and other geophysical methods. Inte¬gration of these data and gravity inversion with the constraints of a priori parameters of the geological media allows making optimal decisions.
-
-
-
Comparative analysis of air quality in Kyiv by GIS and remote sensing in 2019–2020
Authors V. Babii, O. Gordiienko and I. TsyupaSummaryThe issue of polluted air is relevant and crucial for supporting the sustainable development of the city and preserving the environment. For the capital of Ukraine, the difficulties associated with assessing air quality began from the moment the city began to occupy a leading position in the most polluted air among the world's cities. Today, there are three sources of information on obtaining air quality data. The first source is government air monitoring systems. In Ukraine, in most cases, this is not an automated monitoring (information cannot be promptly received by public authorities and the public), in contrast to European countries, where there is a single network of automatic monitoring stations that transmit online indicators of the air condition in the city. The second source is public monitoring. In terms of the number of stations and observation points, it is already significantly ahead of the existing system of state monitoring. Such monitoring stations have been installed by city residents, independent projects, organizations and local governments. Due to the large number of emissions from stationary enterprises and the constantly growing number of mobile sources of pollution (mostly vehicles), the level of development of the network of air monitoring stations is insufficient. Therefore, in this publication, we propose to investigate the state of air quality in the third way — using satellites that perform spectral analysis of entire layers of the atmosphere. The use of satellite data (remote sensing data) has the advantage of wide territorial coverage and low cost, but the use of these data requires a set of verification and comparison with ground-based instrumental measurements.
-
-
-
The technology of the static geological modelling
Authors A. P. Lobasov and D. P. KhrushchovSummaryThe work is devoted to the main principles of static modeling in sedimentary geology. The static models is the base for scientific and engineering decisions on all the main stages of modern geological research. The technologies of building a models for the different geological objects are discussed. Some elements of this technologies disclaimed more details.
The desktop applied system for static modeling has been developing.
-
-
-
Approaches to the extraction of liquid petroleum products to eliminate groundwater pollution
Authors K. Cherepanova, D. Chomko and O. DyniakSummaryOil and oil products are now one of the most dangerous pollutants in natural water bodies Every year, new sources of pollution are identified, which require an assessment of their danger to the environment. The danger of petroleum products as man-made pollutants is due to the ability of hydrocarbons to form toxic compounds in soils, surface and groundwater. Today, a large number of foci of petrochemical groundwater pollution have been identified, and potentially thousands more, which continue to be in a hidden form, pose a threat to the environment and, above all, to groundwater. Pollution is formed directly due to petroleum products stored on the territory of enterprises, as well as through wastewater and stormwater polluted by them. An important feature of petroleum contamination is the ability to concentrate other contaminants, such as heavy metals and pesticides, and to create the conditions for various chemical reactions when the film of petroleum products is distributed over a large area. Methods of combating the consequences of oil product losses and their effectiveness are analyzed.
-
-
-
Geoinformation modeling of erosion processes in the basins of small rivers (on the example of the river Horynka)
Authors K. A. Lukyanchuk and O. M. PidkovaSummaryThe article considers geoinformation modeling of erosion processes within the basin of the small river Horynka (Ternopil region, Ukraine). The stages of creating factor maps and the final map of soil erosion intensity (erosion hazard) using the Universal Soil Loss Equation due to erosion and its modification (USLE / RUSLE) are described. Potential soil losses due to erosion are determined and the main factors that influenced them are reflected. The obtained data show that erosion risks change in accordance with changes in the topographic gradient, as well as the vegetation cover of the Horynka river basin. The results of the study should be taken into account when justifying the complex of anti-erosion measures in the river basin, planning of environmental measures and rational use of natural resources in general.
-
-
-
The spatial analysis of the hydropower modules distribution for the Pripyat basin within Ukraine using open GIS technologies
Authors V. Korniienko, O. Obodovskyi and S. SnizhkoSummaryThe hydropower modules values of rivers are necessary for a qualitative assessment of their hydropower resources. The maps of hydropower modules distribution can be used to determine this characteristic in the absence of the necessary data for calculations. The input data for the map creation were the values of the calculated hydropower modules for the Pripyat basin rivers within Ukraine. The map creation consisted of several stages and was carried out using open GIS technologies. As a result, three maps of the hydropower modules distribution with different intervals of isolines were created and the accuracy of the constructed materials was evaluated. The most advantageous map for practical use is determined. It is noted that the map with an increase in the number of isolines contributes to a more detailed recognition and determination of the hydropower modules values for rivers which there are no calculations.
-
-
-
Opportunities and Limitations for Ground Motion Mapping Using InSAR Technique
Authors K. Tretyak, D. Kukhtar, M. Prykhodko, V. Romaniuk, I. Bodnaruk and O. VyrstyukSummaryCopernicus is the world’s largest Earth observation program, directed by the European Commission in partnership with European Space Agency. Together, two satellites Sentinel-1A and Sentinel-1B provide at least two InSAR-capable measurements of the entire European continent every six days. A SAR instrument transmits an electromagnetic signal and records the backscattered energy from the Earth’s surface. The signal contained in each pixel is a complex value. The pixel value is related to the sum of backscattered signals from all the individual scatterers within the pixel. As any other geodetic technique, InSAR has its limitations. This article outlines the most crucial ones that will have to be considered in the context of the deployment of an operational service. Measurement points in InSAR depend on a large number of factors (e.g. materials, geometric shape, orientation, etc.). InSAR measures the relative motion between points on the ground with very high accuracy, but cannot directly measure an absolute motion. Typically, GNSS networks are exploited for resolving this issue. Just as with any other techniques, InSAR has its limitations. However, these limitations can be mostly accounted for and partially overcome by the experience, knowledge and on-going research, of the InSAR experts.
-
-
-
Application of factor analysis to determine factors affecting the iron grade in Precambrian BIF deposits
Authors O. Plotnikov, M. Kurylo and V. StapaySummaryFactor analysis can be viewed as a complex statistical method for solving geological problems. This is the reason for its wide application in geological sciences. The method of factor analysis was used in the work to determine the reasons that are initial for the ore grade and it helps to plan and optimize mining operations on a long-term basis.
The studies were carried out at the example of Ukrainian BIF deposits that form the basis of the iron ore mineral resource base of Ukraine – deposits of Inguletsky, Pivnychny, Novokryvorizhsky, Central, Pivdenny, Poltava mining and processing plants. The iron grade of the deposits exploited by these enterprises was analyzed. Deciphering the factorial structure of deposits made it possible to identify factors that determine about 65% of the variability of the iron grade. These are primarily the conditions of sedimentation of ferruginous-siliceous formations containing deposits. The highest iron concentrations were formed in the central parts of synclinal deposits. Then wider and deeper the sedimentation basin was developed than richer ferruginous quartzites were created. Therefore, the Skelevatske and Ternivske deposits are characterized by the highest iron grade. They are located in the frame of the largest granite-gneiss domes on the Ukrainian shield (Saksaganskiy and Demurinskiy), and their general structure is inherited from the most influential greenstone belts of the Central Dnieper region (Shirokovsky and Verkhovtsevsky).
-
-
-
Prospects of microseismic monitoring of hydraulic fracturing in Ukraine
Authors G. Lisny, O. Krasnikova and S. VyzhvaSummaryIn spite of the wide use of hydraulic fracturing in Ukraine, microseismic monitoring of hydraulic fracturing is used to a very limited extent. This can lead to situations where the fracture zone does not meet the design objectives. The lack of microseismic control reduces the economic efficiency of hydraulic fracturing. To solve this problem, specialists from the Institute of Geology of the Taras Shevchenko National University of Kyiv have initiated a development and production program of modern methods of microseismic monitoring of hydraulic fracturing. One of the areas of work is the creation of technology and software for the imaging of microseismic events using the continuation of the microseismic wave field in the geological environment.
-
-
-
Correlation of coal layers using the Mahalanobis generalized distance during exploration of coal deposits of a difficult structure
Authors O. Plotnikov, M. Kurylo and V. StapaySummaryDuring exploring coal deposits with very complex geological structure, often there is a problem of correlation of coal layers, which are discovered in different tectonic blocks, their tracing of extension and fall within the entire field. Deposits (areas) of a very complex geological structure are characterized by variable quantitative or qualitative minerals parameters, very uneven distribution of major or harmful components. This problem becomes especially relevant in the early stages of geological study. Similar problems can be solved by comparing the quality indicators of coal layers using the generalized distance of Mahalanobis. The coal seams in different tectonic blocks are characterized by different elements of occurrence and they are shifted by several tens and even the first hundreds of meters. Therefore, their connection in space, identification is quite a difficult task. To solve this problem, multidimensional values of ash content (Ad,%), sulfur (S,%), and calorific value (Qs MJ / kg) were compared. As a result of the performed researches, it is established that the generalized distance of Mahalanobis quite clearly identifies coal seams on their qualitative indicators.
On the example of the deposit of the third group of complexity, it is shown that using the value of the generalized distance of Mahalanobis it is possible to carry out with a high degree of reliability correlation and tracing of separate coal seams in various tectonic blocks within the whole deposit.
-
-
-
Integrated Geochemical and Geophysical Monitoring of the Ecological State of Sedimentary Systems in Danube-Black Sea Region: Pilot Results and Development Prospects
Authors S. Vyzhva, O. Shchyptsov, S. Shnyukov, I. Lazareva, A. Gordeev and A. VirshyloSummaryAn important task of ecological and geochemical research is the prevention of environmental pollution, including river, shelf and deep sea sediments. Solving such problem requires technologies that are capable to: (1) effectively detect even weak geochemical anomalies, (2) monitor them precisely, (3) reliably predict dangerous developments. A possible prototype of this technology has been pilot tested in this work. The Danube-Black Sea region is selected as an example. This region is an indicator of the ecological state of a large part of the European continent. As a result: (1) A new representative bank of geochemical and geophysical data (132 representative samples, 40 determined parameters) for the sediments of the Danube-Black Sea region was created. (2) Pilot testing of data processing with the use of precision background counting technology yielded positive results. (3) This technology can be considered as the basis for international environmental projects both in the Danube-Black Sea and in other regions.
(4) This technology is applicable to solving some fundamental problems of Earth’s continental crust evolution.
-
-
-
Prospects lithium extraction from produced water in oil and gas fields of Ukrainian
Authors M. V. Reva, D. F. Chomko and F. ChomkoSummaryThe article considers the urgency of the search for new lithium raw materials caused by a sharp increase in demand for this element. The authors consider the world’s reserves of lithium raw materials and the main genetic types of origin of these deposits. The authors explored the world’s leading lithium manufacturers and the main technologies used. The main suppliers of lithium raw materials are Argentina, Chile and the United States. These countries produce mainly lithium carbonate, which is obtained mainly from hydromineral raw materials. The article identifies Ukraine’s interest in developing its own lithium deposits. Stocks of lithium raw materials in Ukraine are calculated mainly for pegmatite deposits. According to this amount of lithium reserves, Ukraine ranks first in Europe. The authors highlight that in Ukraine lithium reserves are concentrated not only in pegmatites but also in associated reservoirs of oil and gas fields. Ukraine has been developing oil and gas fields for a long time, as a result of which the extracted water together with the hydrocarbon sometimes reaches 95% in terms of water content. Due to geological and hydrogeological conditions, the waters of these deposits have high mineralization and with rather significant concentrations of lithium. At the experimental deposits, the lithium concentration ranges from 10 to 20 mg/dm3, but these values can vary greatly. These indicators are approximate but clearly indicate that the associated watershed is a promising resource. For efficient and rational use of this type of lithium raw material deposits, the authors identify the main tasks facing modern geologists
-
-
-
Peculiarities of thrust kinematics of the Chornogorski thrust and Krosnenska zones (Eastern Carpathians) and structural control on landslide hazards
Authors D. Kravchenko, N. Romanchuk and O. IvanikSummaryAssessment of landslide hazard forecasting and development of preventive measures is impossible without full assessment of causes and determination of failure characteristics of rock complexes, which are based on a set of field measurements, paleotectonic and structural research. Integrated study of structural data with geomorphological and external factors demonstrated that the local paleogeodynamics of the Eastern Carpathians is characterized by its regional uniqueness of such paleotectonic movements as compression and displacement of mountain ranges in the north-eastern direction and the formation of a system of large and small thrust. The angular relations between the main vector of the directions of erosion forms and the orientation of the hypothetical axes of the main normal stresses is not only vertical but also is left-sliding movements of hanging thrust blocks. The paleogeodynamic regularities could be the basis for establishing the structural paragenesis of different stages of thrust formation. The features of the thrusts of the Chornogorski thrust and Krosnenska zone could be used for the study of newest exogenous geodynamics These studies confirm that structural and tectonic factors play an important role in the landslide formation.
-
-
-
The application of the ERT method for the landslides investigation
Authors O. Ivanik, O. Shabatura, R. Khomenko, D. Kravchenko and K. HadiatskaSummaryThe ERT studies were carried out in the Kyiv and Carpathian regions, Ukraine. Electrical Resistivity tomography (ERT) using Schlumberger array was conducted to determine the various potentially landslide-prone areas characteristics, the weak zones and places with a high water saturation within in the study areas. Two software applications packages of RES2DINV and Zond2RES have been used to build geoelectric sections. Various data interpretation techniques have been tested. The research results in the elaboration of the technique for measuring and building geoelectric sections that is effective for enables to identify fracture zones and areas with high water saturation, as well as, identify early signs of formation of new displacement. Thus it is possible to confirm the existence of potential sliding zones. Application of ERT has revealed, that weak zones with a high water saturation are characterized by extremely low electrical resistivity.
-