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Geoinformatics
- Conference date: May 11-14, 2021
- Location: Online
- Published: 11 May 2021
81 - 100 of 154 results
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Computing raster maps of Earth crust stress regimes in Turkey using WSM database and lineament analysis of satellite images
Authors S. L. Nikulin, K. L. Sergieieva and O. V. KorobkoSummaryThe investigation of crustal stress state is an important scientific problem for the theoretical investigating of tectonic processes and solving many practical issues of mineral deposits searching and exploration, underground structures construction, disasters forecast, etc. The available measurement data of the modern stress field, summarized in the databases of the international project World Stress Map (WSM), are extremely unevenly distributed, which causes the need to search for approaches to gaps restoration. A method for assessing the crustal stress state regimes (normal faulting, thrust faulting, and strike-slip) on a regular satellite data grid is proposed based on the supervised classification in a multidimensional feature space. Features are generated by constructing and processing lineament networks and contrasting boundaries of satellite images. The projections of the measurement points from WSM database are used as references. The method was applied in the northern part of Turkey. Based on the lineament analysis of Terra MODIS and Aster satellite data, a 21-dimensional feature space was generated and used to classify the territory into three classes with the predominant stress state regimes. The forecast accuracy was estimated based on reference samples and on average is 82%. Ways of further method improvement are discussed.
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The Comparison of Random Fields with «Power» and Whittle-Matern Correlation Functions in 3D area by Statistical Simulation on Rivne NPP example
Authors Z. Vyzhva, V. Demidov and A. VyzhvaSummaryThe article is devoted to using methods of random fields in 2D area statistical simulation (Monte Carlo methods) in environmental geophysical monitoring problems. A new method has been devised to simulate random field in 2D area with «power» correlation function, based on spectral decomposition, for investigation of chalk layer density on Rivne NPP industrial area territory. It has been considered the problem of statistical simulation of «noise» for chalk layer density realizations as random fields in 2D space. It has been constructed the statistical model for the gauss random fields with «power» correlation function in two-dimensional space.
It has been received of random fields in 2D area realization with «power» correlation function by using those models, formulating the algorithm and building programs. A comparative analysis of random fields with «power» correlation function with Whittle-Matern correlation function is given.
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Geoinformatic database of geoarchaeological sites of Ukraine
SummaryAn interactive database of geoarchaeological sites of Ukraine has been elaborated as an inalienable part of the project “Reconstruction of the natural environments of ancient Man’s habitats in Ukraine during prehistoric and historical times”. This database enables the synthesis and analysis of all palaeoenvironmental proxies, derived from archaeological sites. The data are collected from over 300 geoarchaeological sites of Ukraine and from more than 400 cultural layers. The format GeoPackage has been chosen for the geospatial database construction. A unique code ‘id’ given to each site and layer. The database is visualized as an online-map, which has been created using the Leaflet technology and the qgis2web plugin in QGIS software. The html file has been then imported into a GitHub repository, which enabled the creation of the web-page on the Netlify platform. Now users can obtain the information from the Cloud storage. The interactive map includes several vector layers: the list of sites of different material cultures, their modern environmental characteristics, the results of all Earth-science studies, fulfilled on a site, and the reference list.
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Methodology of scientific forecasting based on GIS of precious metal deposits in eastern Kazakhstan
Authors Y. Yeskaliyev and K. ZikirovaSummaryExperience of forecast studies testifies the lack of dominant factors of ore systems development and deposits location. In this connection, the necessary element of a forecast is studying and modelling of self-organized ore-formation systems based on understanding of interrelation between deposits formation and earth interior evolution.
Ore formation must be reconstructed on the basis of system analysis methodology. The information for such analysis can exactly be represented by GIS that will enable to find common regularities and common approach to assessment of studied territory perceptivity.
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Development of a web portal for presenting earthquake observation data
By K. BrudkoSummaryThis paper presents ways to create a modern, secure application for visualization of monitoring data on earthquake observations on the example of a geo-portal. The main criteria of the created website are UX- interface, cross-platform, fast and free access to geospatial information, selection of educational information about each seismic event.
The creation of the database-based model is the result of interaction of Python for Django technology and PostGIS. The MVT architectural template was used to design the website. Distinction between geospatial and textual information allowed to store new articles and publications directly in the database, with access to them from any platform. For the client part of the application, standardized technologies of HTML, CSS, JavaScript and their libraries are used. The built-in script for processing files GeoJSON API JavaScript for ArcGIS loads the map and displays geospatial data.
This web application does not require external resources, with the ability to add your own seismic maps, magnetometric data, etc.
According to this, it is possible to use a web portal to analyse the zoning of seismic hazards, provide information about catastrophic consequences, and create algorithms for their prevention and prediction.
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Theoretic basis of information support for R&D on geological environment management
Authors D. P. Khrushchov, O.O. Remezova, O. T. Azimov, V. V. Dolin, O. L. Shevchenko and S. P. VasylenkoSummaryMain provisions of the theory of information support for R&D on geological environment management are formulated . Basics of infogeological modeling as an innovative method of information support are presented.. Basing upon the scheme of geological environment management specific modified methodologies of nfogological models have been developed. iSeveral the most interesting and efficient examples of infogeological modeling on different directories of geological environment management are demonstrated, namely: . Methodology of infogeological modeling for oil and gas fields forecasting; . Information modeling of placer deposits; . Information support for R&D on hydrogeosphere management; . Infogeological modeling for geological environment of military activity; . Geoinformatic modeling of irradiation dose formation for the population. The same prospects have been made and have to be presented as independent papers, namely: Infogelogical modeling for the objects of solid domestic waste monitoring; Methodology of information support for research in seismology; Theory of information support for territories of salt mining. The prospects of further development for this innovative direction of information support for R&D on geological environment management consist in improvement of theoretic basis, especially the concept of GE frame organization, and expansion of the list for directions and objects of GE management.
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The contribution of geophysics to geoenvironmental studies
By Z. KalábSummaryAt present, it is very important to pay attention, among other things, to the natural environment. One of the methods that is significantly used in the study of the geoenvironment is geophysics. In geophysics, physical methods and principles are used to study the formation and dynamics of the Earth. This paper shows on selected examples the contribution of geophysics to the study of geoenvironment, which is necessary for geological environment management. Generalized procedures will be the basis for the administrative management of processes associated with the use of the geological environment. The primary data can be interpreted for various purposes and therefore uneconomical to perform the measurement again. Interpreted data are stored in databases of various types. The problem is greater with primary data, as they have different formats and often require specialized software. Basic information about the surveys can be found in the so-called metadata, but even here it is necessary to unify the data.
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The potential of water-soluble gases in Ukraine
Authors N. P. Khovanets, S. S. Kurovets, T. V. Zderka and A. V. YaremaSummaryThe prospects of the development of hydrocarbon water-soluble gases are explained. The main sources of water soluble gases have been identified. Gas saturation-to-depth relation is determined. The variation of gas saturation with distance from reservoir limit are thoroughly analyzed. The qualitative composition of water-soluble gases as well as its variation in depth are explained. The challenges that arise while developing water-soluble gases are provided.
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Enhancement of 2D/3D GPR Data Imaging by the Proposed TAEF Technique: Displaying Archeological Remains under the Colonnade Road in Anavarza Ancient City, Adana, Turkey
Authors M. Ozkan-Okay, S. Kadioglu and R. SametSummaryGround Penetrating Radar (GPR) is a geophysical method that is used for investigating and visualizing the underground structures. The GPR usage has been increasing recently, because it can determine and visualized underground structures sensitively without any excavation. The aim of this study is to enhance 2D/3D GPR data imaging quality with the proposed methodology and visualize the buried archaeological remains under the archaeological road called as “Colonnade Road” in Anavarza ancient city, in Adana, Turkey. In this context, a new threshold and enhancement filtering technique has been proposed to contribute to reduce the effect of the environmental noise and physical or chemical changes of the soil in the defined study area. The proposed methodology consists of three stages. The first stage is the GPR data collection and processing. The second stage is calculating a proposed threshold and an enhancement value. The final stage is obtaining a final GPR profile data sections by adding the enhancement value and visualizing them in 3D GPR data volume obtained by sequencing of them. The results have been showed that the anomalies more visible and distributed from its environment on the quality enhanced GPR sections and their x-y time/depth slice of their 3D GPR data volume.
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Refined mantle velocity model at Ukrainian Shield adjusted after Karato
Authors Y. I. Dubovenko, L. A. Shumlianska, P. G. Pigulevskyi and V. K. SvistunSummaryPurpose. The additional velocity boundaries defined from velocity gradients in the upper mantle under Ukraine area need to be validated. These boundaries are outlined at alternation zones of increased and decreased values of the P-wave velocity gradients within tectonic units of Ukrainian Shield. They form characteristic patterns that correlate with main vertical dislocations and boundaries of deep-seated inhomogeneities within mantle. We need to compare them with the known density distributions and derive proper local velocity model based on vp/vs ratio.
Method. To prove these boundaries we invert the 1D velocity models taking into account impact of inelasticity in the mantle after Karato (1993) . We compare velocity ratio vp/vs with the known density models as PEM-A, PEM-C, PREM, AK135. The resulting curve was recalculated into a density distribution curve.
Results. This procedure reveal a discrepancy between the common models and the estimated model up to a depth of 800 km, while below this depth the coincidence is good. There are outlined 7 structural horizons at upper mantle (under ∼180–190 km, ∼210–220 km, 250–260 km, 360–370 km, 410–420 km, 620–630 km, and ∼660–670 km) and 7 structural horizons at lower mantle (under ∼710–730 km, 760–770 km, 810–820 km, 1050–1060 km, 1660–1710 km, and 1900–1910 km).
Practical value. A new approach for the definition of the mantle inhomogeneities distribution based on vp/vs ratio is tested. A radial velocity distribution within mantle from P waves were obtained beneath Ukrainian Shield. It proved the previously identified gradient velocity boundaries within the mantle.
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Innovative approaches to information modeling of placer deposits
Authors O. O. Remezova, D. P. Khrushchov, S. P. Vasylenko and O. V. YaremenkoSummaryThe paper is devoted to the problem of information support for geological research and works aimed at developing the mineral resources base of priority sectors of the national industry The purpose of this publication is to present innovative approaches to information modeling of placer deposits of heavy minerals, cassiterite and rare-metal mineralization, amber. The tasks are the coverage of the methodology and methods, demonstration of modeling examples for typical objects, designation of a strategy for further research in the field of information modeling. The methodological basis of targeted information modeling is the formation analysis combined with the approaches of info-geology. Methodological and methodic development is predictive and reconstructive complex for modeling geological objects of various scales. The methodological complex of information support for research and works includes two blocks: a predictive-paleoreconstructive retrospective-static model and an integrated ecological-geological model of a local geological object (CEGM), including a digital structural-lithological (subordinate rank) model (DSLM) and other functional submodels. The examples of modelling of placers are shown. Prospects for the further development of information modeling are suggested.
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Ontology of geodetic, cartometric and morphometric methods in the geoinformation environment
Authors D. Kin and Y. KarpinskyiSummaryThe period of traditional measurements on analogue maps is coming to an end. This is being replaced by rigorous computer methods that will determine the metric properties of a feature with user-defined accuracy. The article proposes the research of conceptual and ontological models of geodetic, cartometric and morphometric methods in the geoinformation environment to provide a clear understanding of all instances and properties of these methods and to specify the requirements for the software product and its components. The ontological approach has provided a strict structuring of terms and concepts of the geodetic, cartometric and morphometric methods. It has ensured the creation of ontologies that define entities as the root classes of research and explore the relationships between them. The developed conceptual UML model and ontological model of geodetic, cartometric and morphometric methods in the geoinformation environment defines the entities and properties of these methods using CASE-visual design tool and Web Ontology Language.
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The implication of fuzzy sets for energy transition critical minerals modelling of World demand-supply projection
Authors I. Virshylo and M. KuryloSummaryThe low-carbon energy transition demands many minerals that are exhaustible. The success of potential replacement of the current energy industry by a set of green-friendly technologies depends on the availability of these minerals both in a global and regional sense. This research is representing the specific assessment based on the limited list of minerals most important for low-carbon technologies: wind, solar photovoltaic, concentrated solar power, hydro, energy storage, carbon capture and storage, and geothermal. A probabilistic approach was applied for the estimation of both critical commodity supply and various green energy transition technologies. There are 10 criteria were selected to describe the demand-supply system and 17 metals estimated. A balanced demand-supply system was described and calculated by the fuzzy set approach.
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Fundamental singularity points in elliptical orthorhombic media
Authors A. Stovas, Yu. Roganov and V. RoganovSummaryThe fundamental S waves singularity points in elliptical orthorhombic media are defined. It is shown that each elliptical orthorhombic model contains only one singularity point located in one of the symmetry planes depending on the magnitude of S wave stiffness coefficients. The S wave slowness surfaces are also defined.
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Geoinformation Technologies to Study Geology and Geomorphology Conditions and Features of the Riverbed Depositions Lithological Structure of the Velykyi Kuyalnyk River Catchment
Authors E. Cherkez, S. Shatalin, O. Chyzhyk, T. Kozlova, V. Medinets, V. Yavorska, S. Medinets and I. SoltysSummaryPurpose of the work was to study the geological and geomorphological conditions of the Velykyi Kuyalnyk River (VKR) catchment and the features of its channel depositions’ lithological structure. Methodology. The ArcGIS, Global Mapper, MATLAB and statistical software were used to process and analyze topographic, geological, geotechnical and hydrogeological data and lithological structure of the riverbed. Results. An elevation model on a scale of 1:25000 was built and used for development of a set of maps (horizontal relief ruggedness, geological and geomorphological conditions, etc.). Relief ruggedness indices in the catchment correspond to changes in the regional features of geological structure and rock material composition. They also determine the conditions for the precipitation flow and river feeding with groundwater, erosional rock destruction, sediments transit and accumulation in the riverbed. Cyclical nature of the processes of dispersed material accumulation is well expressed in the lithological structure of the riverbed sediments (changes in composition, thickness in depth and along the channel). Conclusions. Making decisions on implementation of the measures to restore the optimal ecological state and water supply for the VKR, the main regularities of lithological structure variability and filtration properties of channel sediments should be taken into account.
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Calculation of wave parameters for weakly anisotropic media
Authors Yu. Roganov, A. Stovas and V. RoganovSummaryTo compute the phase velocities in the weakly anisotropic media, we propose to transform the Christoffel matrix into an adapted coordinate system, and, then, apply the perturbation theory to the resulting matrix. The diagonal elements of the resulting matrix are initial approximations of the phase velocities squared. To refine them, it is proposed to use either iterative schemes or Taylor series expansions. To approximate the phase velocities of the S1 and S2 waves, a stable method is proposed based on solving a quadratic equation with the coefficients being expressed in terms of the matrix elements and the precomputed value of the qP wave phase velocity squared. The computational accuracy is demonstrated for the standard orthorhombic model.
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Bashkirian dolostone reservoirs of Bobryk oil and gas condensate field (Dnieper-Donets Basin)
More LessSummaryThe paper discusses Bashkirian dolostone reservoirs of Bobryk oil and gas condensate field in terms of hydrocarbon prospects. It is shown that Bashkirian dolostones are massively altered by the secondary diagenesis processes. Diagenesis affects the void pore space unevenly and may either decrease or increase filtration capacity properties. The main identified processes are dissolution, dolomitization, and silicification. It was defined that the most altered dolostone reservoirs have the highest filtration capacity properties. Thus, understanding these processes will give the opportunity for the possible discovery of new prospective hydrocarbon filed.
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Dynamic balance of natural resource use aimed at national economy’s sustainable development (the case of coal mining adaptive modelling)
Authors L. Horoshkova, Ie. Khlobystov, V. Trysnyuk and T. TrysnyukSummaryIt has been proposed to improve the coal mining management system in Ukraine applying a bifurcation and adaptation mechanism for the development of natural resource use in Ukraine. The economic and mathematical modelling was used to prove the necessity of taking into account small fluctuations and coking coal and anthracite export-import flows to rise the efficiency of the resource base of Ukraine exploitation. The methods of efficient consideration of the world market price`s environment as a mechanism of own resource base preservation, long-term forecasting of its development parameters and paving the way for safe development of metallurgy and energy production in Ukraine have been argued.
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Geospatial and magnetic assessment of soil and relief of the farming lands at the Forest-Steppe zone of Ukraine
Authors O. Tonkha, O. Menshov, S. Sychevskyy, O. Pikovska and A. BalaevSummaryThe precision farming require the study the heterogeneity of soil. Relief is one of the key factors of spatial heterogeneity of soil, which affects the redistribution of nutrients and the development of erosion. The intensity of water erosion directly depends on the relief, as well as the redistribution of moisture in the fields. The aim of the present study is to investigate relief of the territory as a basis for spatial variability of soil properties, crop yields, and soil magnetic susceptibility (MS). The geospatial methods in combination with the magnetic measurements were attracted. The experiment was performed for chernozem soil of Lotivka Elit LLC (Khmelnytsky region) and for the Greyic Phaeozems Albic of Kononi area (Poltava region) at the Forest-Steppe zone of Ukraine. The fertility of soil was different according to depressions of the relief, acidity and low phosphorus content. Depending on the relief, the content of mineral nitrogen and exchangeable potassium has not been established. The soil properties, erosion, and relief condition are in close relation to the soil magnetic susceptibility. Assessment of the relief allows to predict soil erosion and increase the fertility.
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Mathematical modeling of the connection between different types of cracks and elastic parameters of quartz-magnetite-pyroxene crystalline shales
Authors I. Bezrodna, D. Bezrodnyi and V. SvystovSummaryThe work is devoted to modeling the influence of different types of cracks on the acoustic and elastic parameters quartz-magnetite-pyroxene crystalline shales group of samples from the Pishchans`ka iron ore structure. Models include ordered, chaotic and combined cracks, as well as the influence of the format and concentration of cracks. The authors calculated the complete set of components of the matrix of elastic constants, determined the differential coefficient of elastic anisotropy.
The results showed high anisotropy of the models and a significant effect of ordered cracks on the value of the differential coefficient of elastic anisotropy and other elastic parameters. According to the results, stereoprojections of the index surfaces of the obtained parameters were constructed and analyzed. A comparison of the basic sample and models is also given.
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