- Home
- Conferences
- Conference Proceedings
- Conferences
18th International Conference on Geoinformatics - Theoretical and Applied Aspects
- Conference date: May 13-16, 2019
- Location: Kyiv, Ukraine
- Published: 15 May 2019
101 - 120 of 142 results
-
-
Reconstruction of seismic DSS crosssection of the VI geotravers and detaling of velocity characteristics of the earth crust in the gravity Bandura srtucture
Authors D. Lysynchuk, L. Farfuliak, K. Kolomiyets and O. KolomiyetsSummaryThe paper proposes reinterpretation of digitized seismic hodographs of geotraverse VI (on the distance 440–520), and further calculation of the velocity model using tomographic inversion in order to clarify the deep structure of the Pobuzkyi mining-ore district (PMOD) of the Ukrainian shield (USh), which is characterized by various mineral complexes of crystalline Precambrian rocks.
-
-
-
Some aspects of resource model validation
Authors N. Bariatska and N. SafronovaSummaryFor modeling and resource estimating of mineral deposits, control of the correctness the resource model is very important. There are a lot of methods for identification and elimination critical errors, including the application of incorrect methods in modeling and resource estimation. Geological objects, in particular mineral deposits, are highly complex, so a model created on the basis of a limited set of data cannot be true. It should reflect the individual properties and parameters with enough sufficient to solve actual practical problems. It can be achieved using an optimal set of verification procedures at different stages of creating a resource model.
-
-
-
Petrophysic model for determin clayness of rocks by the results of complex geophysical researches
Authors V. Fedoriv, S. Bagriy, I. Piatkovska, Y. Femyak and A. TrubenkoSummaryThe work is devoted to solving the problem of determining the clayness of reservoir rocks with complicated cross-sections carboniferous deposits at Narijnianske gas-condensate field. The results of determination clayness according to laboratory and well geophysical studies are considered. To solve the problem, a comprehensive approach is proposed regarding to use the results of acoustic, neutron and gamma-gamma-density methods. Petrophysical models of interconnection mass clayness with rock density and porosity coefficient were constructed. . As a result, it has been established that mass clayness practically do not affect to the volumetric density of rock. A spatial model of roof productive horizon C5 at Narijnianske gas-condensate field was constructed.
-
-
-
Geomorphological and geological causes of landslide processes within the Krosnien structural and facial zone (Ukrainian Carpathians)
Authors O. Ivanik, V. Shevchuk, V. Yanchenko, D. Kravchenko, S. Pikul and A. MazkoSummaryGeological and geomorphological factors of natural hazards within the Krosnien structural and facial zone (Ukrainian Carpathians) have been defined. Principal impact of rock lithology, geomorphological structure, underwater regime and tectonics on the landslides formation is described. The research confirmed a special role of the tectonic factor and the presence of weak zones in the development of mass movements. Weak zones are characterized by fracturing, brecciation, bedding of flysch deposits and contrast in permeability. Assessment of the stress-strain state of the slope of complex geological structure has been proposed. The phenomenon is described as thermoelastic-plastic equilibrium of the isotropic matrix under effect of applied mass (gravitational field of the Earth) and surface efforts, inhomogeneous stationary temperature field. In addition, it was assumed that the Young modulus at each point of the matrix depends on the water saturation.
-
-
-
Geographic Information Systems in Management Activity
Authors O. Fedchenko, I. Pampukha, P. Savkov, V. Loza, M. Nikiforov and R. KoltsovSummaryIn a modern competitive environment, the decision makers should actively apply new technologies in their activity. One such technology is the geographic information system that allow to integrate spatial and attributive information. The authors consider basic foundations of the management decisions support based on geographic information technologies.
-
-
-
Enhancement of the spatial resolution of the land surface thermal field imagery based on the multispectral data coupling from various space systems
Authors Ya. I. Zyelyk, S. V. Chornyy and L. V. PidgorodetskaSummaryThe methodology has been developed for enhancement of the spatial resolution of the land surface thermal field imagery, based on: the satellite images coupling in the visible, thermal and radar ranges into the single multispectral data product; the regression models of the images relationship constructing; the regression classification of the multispectral data product on the base of machine learning performance. The methodology is implemented in the open cloud platform Google Earth Engine using the Earth Engine API and the software scripts created in the JavaScript language with the processing of multispectral image collections of various space systems at specified time intervals. The possibility of practical synthesis of the pseudo-thermal image with the enhanced spatial resolution of 10 m based on the thermal image with the resolution of 100 m and the multispectral composite with the layers resolution of 10–30 m is shown. Extension of the methodology scope to monitoring of the high-temperature objects with internal heating sources (fires, geothermal phenomena, etc.) requires further research in the direction of joint use of the Landsat-8 B6, B7, B10 infrared bands data. Require further development and research the calibration methods of the proposed regression mathematical models and validation of the synthesized images with high spatial resolution.
-
-
-
Analysis of orthogonalization and smoothing methods for vectorization of raster data
Authors S. G. Volkova and Y. A. KrucheniukSummaryThe combination of automated cartography and GIS meets the most pressing needs of society. Cartography studies carried out in recent years in the field of computer cartography show that one of the priority areas was the creation and improvement of geographic information systems designed to collect, systematize, process, evaluate and issue multiple mapping and specialist information at the request of a large number of users. In the GIS for various purposes, a lot of information about the Earth is integrated on topographic, thematic, digital and electronic maps, city plans, space images and other materials. The constructed models of maps that increase the efficiency are presented in the form of cartographic information.
As a result of the performed research, a method was developed that determined the sequence and construction of models with average, linear complexity relative to the raster area with an effective increase in the stability of image defect s. Submitting source information about an object in the form of, algorithms of vector, object, linear and regional GIS objects, the basis of which are models of primary raster images. focused on their practical use in developing raster data vectorization systems.
-
-
-
Use of geoinformation technologies in tasks of water objects pollution monitoring
Authors L. V. Plichko, V. I Zatserkovnyi, O. E. Nikolaenko and I. V. BaidaSummaryThe topical issue today is the problem of the effectiveness of the use of geo-information technologies for monitoring of water objects pollution, since ecologically clean rivers and lakes are a prerequisite for ensuring stable and safe water supply for the population. The paper suggests using Python software to process aerospace images taken from Landsat 8 satellite. Normalized Difference Water Index (NDWI) index was also considered for studying of water objects condition.
The paper considers the use of the Normalized Difference Water Index - NDWI to determine the presence of water objects in the image using the above-mentioned program. This software allows you to save processed images in the correct format.
The satellite method of observing the environment, proposed by the authors, allows us to follow the changes taking place on the surface of the Earth, using space images. The feasibility of using software that allows the processing of aerosp ace data is presented. The use of the NDWI index to determine the availability of water objects, to determine the turbidity and overall ecological status of reservoirs has been certified. A comparative analysis of two images using the index has shown that in the second case, the water object looks brighter and more appropriate to use for further studies.
-
-
-
Formation, distribution and movement of groundwater on the territory of compacted building in Kiev city
Authors D. Chomko, O. Koshliakov, O. Dyniak and I. KoshliakovaSummaryThe hydrogeological conditions of the construction sites are assessed and the general regularity of formation, distribution, and movement of underground water within the construction sites and the adjoining territory in connection with the technogenic influence are studied. A roadmap for modeling geofiltration processes is proposed, which enables to substantiate the mathematical model and to perform predictive modeling with sufficient accuracy.
-
-
-
The one-dimensional material model of the continental crust
Authors I. V. Pap and I. V. VirshyloSummaryThe research is about constructing a new algorithm for spatial modeling of the solid composition of rocks, which is consistent with the results of geophysical, petrophysical and geochemical studies.
The basic geophysical methods used to solve a complex inverse problem are deep seismic sounding and gravimetry. The determination of probability distributions is carried out by statistical processing of the results of geological and geochemical studies for the material composition and the introduction of confidence intervals for the results of geophysical research. This gives the main advantage over classical methods of inversion with optimization - to avoid the possibility of obtaining geologically meaningless solutions.
-
-
-
Modern geoinformation systems in seismoacoustic investigation
Authors А. Lukiyanchuk, P. Savkov, І. Pampukha and O. MatskoSummaryThe article deals with the providing of information to the Armed Forces of Ukraine about the local area and objects. The detection of the enemy coordinates is one of the tasks of remote passive investigation. It is necessary to accelerate the process of implementation of geoinformation systems as a component of new generation military information systems. The topicality of the research is determined by the combination of the possibilities of information collecting and processing on the terrain with hydrometeorological, operational-tactical, intelligence information. It is necessary to develop geoinformation systems during the combat operations planning and units control in the Armed Forces of Ukraine.
Geoinformation systems (GIS) enable the creation of information products that provide information that accurately meets the needs of the user. A three-dimensional display of a local area from a particular point of the observer's location or a virtual tour of the terrain with a battlefield situation will provide better understanding of the task to the commander of any level than just a paper map with objects showed on it. GIS technologies integrate spatial data from a large number of sources at all levels.
-
-
-
Modeling of dynamics of activity of mudflow processes on the basis of some factors of influence
Authors T. Chepurna and T. LabchukSummaryThe series of mudflow activity and factors are analyzed for the linear dependence between random variables inside the series by using auto regression functions. Models of auto regression in the form of correlograms are constructed. Periodicity is checked with the help of constructed periodograms by the method of spectral analysis. With the aid of correlation and cross-correlation analyzes, the interaction between mudflow activity and factors is traced. As a result of the construction of the crossover regimes of the series of mudflow activity and precipitation at the Rakhiv meteorological station, it was concluded that there is a synastic phase between the rows. By shifting for 10 years of the time series of solar activity, the maximum synapse between rows is achieved. It is logical to assert that on the basis of the existing information on the peaks of solar activity and the amount of precipitation, one can conclude that elevated mudflow activity is increased. The equation for long-term mudflow activity, based on the known values of the annual amount of precipitation and solar activity, is derived.
-
-
-
The analysis of the connection between capillary pressure curves and acoustic properties of sedimentary rocks
Authors O. Krasnikova and S. VyzhvaSummaryThe results of the analysis of the connection between capillary pressure curves and acoustic properties in samples of sedimentary rocks are presented in this paper. The collection of sedimentary reservoir rocks consisting of 8 samples was analyzed. Investigation included determination of density, porosity and permeability, electrical resistivity, and velocities of elastic waves. Capillarometric studies using a centrifuge have been performed. The research showed that capillary pressure curves provide valuable information on pore size distribution and allow determining the contribution of free and combined water in cavities. Joint analysis of capillary curves and graphs of changes in the velocities of elastic waves at centrifugation allows us to more fully understand the processes of propagation of elastic waves in a multicomponent environment and to specify models of reservoir rocks.
-
-
-
Comparison of the methods for reservoir properties evaluation and prediction of permeability by the void space structure of the reservoir rocks (on the example of the West-Shebelynska area)
Authors V. V. Antoniuk, I. M. Bezrodna and O. Ye. PetrokushynSummaryWhen evaluating the reservoir, it is extremely important not only to determine the porosity & permeability but also to understand the fluid flow through the reservoir.
According to a complex of laboratory studies of reservoir rocks from the West-Shebelynska area (interval depths 4929–5380 m), the authors are compared the methods of assessing the reservoir properties. It is shown that the estimation of the void structure and the hydraulic flow units allow locating promising intervals to the same extent. Using multiple linear regression, the relationship between permeability and different types of voids are established.
Correlation dependence between the reservoir quality index and the total volume of secondary voids and fractures are built. It is established, that fluid filtration in the studied samples occurs mainly through the secondary voids and fractures.
Key words: reservoir rocks, fluid filtration, hydraulic flow units, void structure.
-
-
-
On the issue of predicting the activation of EGP in the Transcarpathian region
Authors E. Kuzmenko, T. Chepurna, L. Shtohryn, I. Chepurnyi and Ye. MatviiSummaryGIS-based prognostic information systems enable modeling of landslide and mudflow processes and effectively predict their development. The openness of such systems involves the continuous addition of spatial and temporal information, as well as taking into account new patterns of factor influence. A multistage analysis of time factors of landslide and mudflow-activity is conducted. The existence of a connection between the long-term rows of observations of flood and landslide processes has been proved. Analysis of new data on observations of solar activity and the amount of precipitation allowed us to make an assumption about the need to recalculate the previously obtained integral indicators of the probability of occurrence of landslide and mudflow phenomena. An extrapolation of the previously obtained complex integral temporal index of landslide and mudflow activity was performed by three methods: the average predictive values were calculated. It was establishe d that the beginning of the activation of dangerous gravitational processes is 2021. The highest probability of activation in 2023 was obtained.
-
-
-
Estimation of the heavy metal pollution for the soils and different environmental objects within the solid domestic waste landfills
SummaryThe comprehensive geoecological study of the area closed to the north-western Landfill №5 for the municipal solid waste disposal shows the ecologically negative impact on the environment. It is determined that the existing soils are affected by the significant geochemical transformation. They are characterized by the considerable accumulations of the heavy metals (HMs). In comparison with the conventional pure soils the soil contents of Cu, Zn, Ni, Cr and Pb are 8, 12, 3, 2, 17 times more, respectively. As a result of soil pollution by HMs the number of mobile forms of these metals is increased: for Zn – 4, Ni – 5, Cu – 6, Pb – 8 times.
The anomalous high HMs pollution for the bottom deposits is identified: for Zn – in 800 mg/kg that is 14 times more than maximum allowable concentrations (MAC); for Cu – 150 mg/kg that is 4. 5 times more than MAC. Average Pb content there exceeds its MAC and is equal to 72 mg/kg. Therefore, the bottom deposits have the hazardous level of pollution.
It is shown that the elements of considerable accumulations in grass vegetation are Cu, Cr and Ni at the biological absorption coefficient more 2. 0.
The physical and chemical studies of surface waters show that the contents of microelements (F, Cr, Ni, Cu, Fetot. and Pb) there don't exceed the MAC, but they are higher than the background values. The comparison of the average chemical composition for the ground water samples from the wells of the Landfill area and the regulatory standards indicates that the standard general sanitary criteria for pollution level of these waters belong to the middle and high levels with the considerable exceeds of the MACs for Fe and Ni.
-
-
-
Classification of urban tree species based on seasonal traits using time series of multispectral satellite data
Authors A. Kozlova and V. HermaniukSummaryTrees are considered as an important component in urban ecosystems, providing both aesthetic views and many ecological benefits. Therefore, accurate classification of tree species in urban environments has become an issue of current interest. The purpose of the presented study is to derive a methodological framework to analyse time series of intra-annual multispectral satellite data for accurate classification and mapping of urban tree species and mixed groups using their extracted seasonal traits. Conventionally, it can be divided into two stages. The first stage is devoted to the extraction of urban tree species seasonal traits obtained from SVI time series and refinement of training data sets. The second one is concerned urban tree classification itself using any single multispectral from the acquired time series of satellite imagery. The proposed methodology was applied to classify tree species within Pushkin Park and the park of Kyiv Polytechnic Institute. T he main output data product representing map of the tree species and their mixed groups for 12 recognized tree species. This research demonstrates that seasonal traits extraction from time series of intra-annual multispectral satellite data is very promising for classification of urban tree species and mixed groups.
-
-
-
Applying the models of soil screening and organic carbon content in the soils of Ukrainian Polissia based on the vegetation indices
SummaryThe paper presents the results of the research on the use of screening models with the nutrient remains of grain crops and organic carbon amount in the soils of Ukrainian Polissia on the basis of vegetation indices; the appropriate algorithms for remote diagnosis have been developed.
As a result of the research it was found that the models developed in the previous research are acceptable to determine the level of the earth's surface screening with plant remains of grain crops and the organic carbon amount in the soils of Ukrainian Polissia.
It is shown that the developed algorithms for remote diagnosis are regarded an effective instrument for monitoring the content of organic matter in soils.
The values of vegetation indices within their limits are determined according to the results of the pixel calculation of the soils screening and the classification made (in percentage): <25 (low),> 25–50 (average),> 50–75 (increased),> ; 75–100 (high).
The ranges of indices values for light-gray, gray and dark-gray soils are 0. 24 - 0. 77, 0. 26 - 0. 79, 0. 28 - 0. 80 for the MSAVI index and 0. 23 - 0. 77, 0. 25 - 0. 79, 0. 27 - 0. 81 for the NDVI index respectively.
It is determined that the average indices values for the podzolic sandy soils on the loess sediments, depending on their screening level are: for the low – 0. 26, average – 0. 36, increased – 0. 63, high – 0. 79.
It is found that the remotely determined level of organic carbon content in the soils on the test plots reflects the level of their fertility only within the limits of low (<25%) and average (> 25–50%) screening with cereal crops remains. It is determined that the organic matter content in light-gray (PDe) and gray (GRh) podzolic soils with low screening of plant remains (<25%) is most distinctly diagnosed. The corresponding predominant content of organic carbon is up to 0. 5% and 1. 0 to 1. 5% respectively. It is also deter mined that the optimal and the boundary levels of soils screening as for the possibility to carry out a qualitative remote diagnosis of organic carbon content in the soils are found in the interval 0–25%. It is shown that the spectral image of pixels is noticeably transformed with increased screening, first of all, due to the effect of greater amount of plant remains. Therefore, with the increase of the plant remains amount the diagnosis of organic carbon content in the soils begins to decrease.
The developed approach and the algorithm of diagnosing the organic matter content in the soils of agricultural lands in Ukrainian Polissia is proposed to be used as an effective tool for remote monitoring its reserves.
-
-
-
Model of geomagnetic – climate relationship
Authors V. G. Bakhmutov, G. V. Melnyk and N. A. KilifarskaSummaryThe changes in the main geomagnetic field (according to the IGRF model) and climatic parameters during the 20th century are analyzed. The space-time relationship between them is revealed, its regional and global features are highlighted. The possible mechanism of geomagnetic field influence on the Earth's climate is proposed. It begins with the modulation of cosmic rays by the geomagnetic field and the formation of ozone O3 in the lower stratosphere through ion-molecular reactions. The variations of the temperature near tropopause (through variations of O3 at this level) change the amount of water vapor in the dry part of the upper troposphere / lower stratosphere, thereby affecting on the planet's radiation balance. This influence is unevenly distributed throughout the world due to the heterogeneity of geomagnetic field control of energetic particles entering the Earth's atmosphere. The differences in this effect are shown for the Northern and Southern hemispheres.
-
-
-
Design of digital hydrogeological models for the territory of the Stebnyk deposit of potassium salt
Authors L. Davybida, E. Kuzmenko, B. Karpinskyi, S. Bagriy and I. ChepurnyiSummaryThe analysis of the hydrogeological conditions of the territory of the Stebnyk deposit of potassium salt was carried out. On the basis of the processing of groundwater levels observations, digital models of the level surface of the gypsum-clay hat soles aquifer were created as at 2004 and 2017, as well as the mapping of the groundwater level anomalies. The obtained models made it possible to assess the dynamics of the surface depression development within the area of mines No. 1 and No. 2 during the last decade, to outline the main current trends of groundwater movement for the studied territory, as well as to estimate the probability of the groundwater communication towards the mine No. 1.
-