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SEISMIC STABILITY OF SLOPES OF DAM AND LEVEE IN BAKHCHISARAI RESERVOIR IN CRIMEA
Crimea belongs to an earthquake zone, seismic activity has been repeatedly observed here, accompanied by severe damage. Many of the hydrotechnical facilities constructed for reclamation purposes on the peninsula require reconstruction or repair. The Bakhchisaray reservoir is one of the oldest on the peninsula and has been functioning for more than 90 years, thus the problem of studying the condition of the reservoir is a relevant one. The paper presents the automated numerical calculation of the stability of slopes of the dam and levee of the Bakhchisarai reservoir according to the application Calculation of Stability of Earth Slopes on Circular Cylindrical Sliding Surfaces, which takes into account the depression curve in the body of structures for the main and special case of loads, as well as the seismicity of the GTS location area. The recommendations a on strengthening the slopes of the dam and levee are given as well.
Read MoreINTERNATIONAL EXPERIENCE ON METHODS AND TECHNOLOGIES OF RADAR REMOTE SENSING OF EARTH
The article discusses international experience concerning the methods and technologies of radar remote sensing of the Earth. Modern radar remote systems are the most effective information systems for the study of the earth’s surface. The development of general criteria for the validity of research results is one of the key areas of international cooperation in the field of radar sensing of the Earth. The relevance of research is based on the necessity to expand space technology, develop new methods for processing information and recommendations on the preferred parameters of radar sensing.
The paper shows examples of successful cooperation of national space systems and claims that the development of methods and technologies for radar remote sensing of the earth will remain a priority over the coming years. It is emphasized that primary tasks of cooperation at the international level include the development and implementation of approaches and strategies for the validity of final results and ensuring the quality of the Earth observation data, as well as designing a set of measures aimed at confirming compliance and providing remote sensing data with necessary certification documents on the main parameters of their quality.
Read MoreCHANGES IN CONTENT OF HEAVY METALS IN SOILS OF KOSTOMUKSH REGION UNDER INFLUENCE OF TECHNOGENESIS
The paper presents the results of monitoring studies of soils in the area of the Kostomuksha State Natural Biosphere Reserve, the city of Kostomuksha and the Kostomuksha mining and processing plant. The low gross content of all the studied metals in natural complexes was found. The authors revealed features of the vertical distribution of heavy metal concentrations over soil horizons. A sharp increase in the concentrations of most of the elements studied was found in all soil horizons in the urban zone and on the territory of the plant. For a number of metals, there is a change in the nature of the distribution over the horizons in comparison with background soils.
Read MoreTHE THERMAL GRADIENT INFLUENCE ON THE OIL LUBRICANTS QUALITY COMPOSITION
There was researched the compound composition of oil lubricants SP-4, MR-3 and MR-3K. There was analyzed the dependence between some compounds of lubricants MR-3K and a thermal gradient. There were suggested the active methods of staff and environmental protection.
Read MoreEXPECTED CHANGE IN SURFACE BALANCE OF MASS IN GLACIUM COMPLEX OF ELBRUS UNDER CONDITIONS OF GLOBAL WARMING
The area of the Elbrus glacier complex, which consists of 24 glaciers, currently makes up about 10% of the glaciation area of the entire Caucasus. Climate change has a significant impact on the parameters of the glaciers of Elbrus over the past century. Given the tangible contribution of meltwater from Elbrus glaciers to the total river flow in the mountain and foothill regions of the North Caucasus and its stabilizing role, the interest of researchers in the prognostic calculations of the surface mass balance and glacial runoff becomes clear. In this paper, the authors examine the indicated glaciation parameters during the implementation of the extreme climatic scenario RCP8.5 by the end of this century. It was shown, in particular, that a simultaneous increase in surface air temperature, total solar radiation and a decrease in precipitation calculated on the global climate model and reduced to the Central Caucasus region will cause a significant retreat of the snow line and a reduction in the accumulation area, which will cause the increasing degradation of the Elbrus glaciation in coming years.
Read MoreDETERMINING AXIAL LINES POSITION OF MOUNTAIN GLACIERS
The paper presents predictive calculations of changes in the state of mountain glaciation based on the mathematical modeling methods. The use of three-dimensional models that take into account all types of stresses requires large computational resources, which creates objective difficulties in calculating the evolution of the glaciation of entire mountain systems. This fat has determined the growing interest in relatively simple models, including one-dimensional, so-called “flow-line models”, that is, models that simulate changes in the characteristics of glaciers along the centerlines. Axial lines are built either, in fact, manually, or using fairly complex and costly (semi-) automatic methods. This article proposes a simple algorithm for constructing the axial lines of mountain glaciers for subsequent use in predictive numerical experiments. The algorithm was tested on several mountain-valley glaciers of various configurations.
Read MoreGLOBAL CLIMATE MODEL CONSIDERING CARBON CYCLE OF GROUND VEGETATION
The goal of this work is to build a global hydrodynamic climate model with the inclusion of a new unit for calculating the characteristics of terrestrial vegetation based on the carbon cycle. The vegetation unit describes the production process of forest ecosystems in the seasonal mode of climatic factors. It is established that the global characteristics of the climate system are reaching their steady state over a period of about 2000 years and the model is working stably. The temporal and spatial distributions of the obtained climatic characteristics and the biogeochemical carbon cycle of terrestrial vegetation are presented.
Read MoreTECHNOGENIC TRANSFORMATION OF HEAVY METAL STREAMS IN SOILS IN REGIONS UNDER INFLUENCE OF COPPER-NICKEL PRODUCTION
The paper presents the results of work on the assessment of the technogenic transformation of heavy metal flows in soils on the Kola Peninsula in 2018. The concentrations of heavy metals in soils are significantly higher than the standards at most sites studied. The average gross Ni content exceeds the standard by 80 times, the content of mobile forms of Ni by 40 times; the average gross Cu content – by 22 times, the content of mobile Cu forms – by 85 times. The maximum concentrations of Ni, Cu, Co are observed at a distance of 8 km from the pollution source in a southerly direction. Mn, Fe, and V are relatively evenly distributed throughout the study area. The concentrations of Ni, Cu, Co, Cd, and Pb in the upper soil horizon are higher than in the illuvial one. This suggests that these metals come mainly from the atmosphere. According to the total pollution index (Zc), the soils of the upper horizon of all sites are classified as dangerous, and at a distance of 8 km from the plant they are extremely dangerous. According to the correlation between the content of chemical elements in the soil, two associations are identified: the first – Ni, Cu, Cd, Pb, Co, Zn and Mn; the second one is Cr, V, Fe, and Sc. In general, despite a decrease in the content of heavy metals in the soil, their amount remains high and a disturbance in the natural geochemical cycle is observed.
Read MoreOUTLOOKS FOR USING DATA FROM COPERNICUS ATMOSPHERE MONITORING SERVICE (CAMS) FOR GEOECOLOGICAL RESEARCH OF ATMOSPHERIC AIR POLLUTION AT LOCAL LEVEL (ON EXAMPLE OF NITROGEN DIOXIDE)
The Copernicus Atmosphere Monitoring Service (CAMS), created in 2014, enables us to study the quality of atmospheric air almost in all the countries of Europe based on satellite-based atmospheric observation. Satellites measure the concentration of substances in the molecules of the substance on a certain square of the territory, and the subsequent converting of these concentrations in μg/m3 is carried out using special mathematical models, which currently have a certain calculation error.
Read MoreON DEVELOPMENT OF REGIONAL METHODOLOGY FOR FORECASTING SEISMIC INFLUENCE PARAMETERS OF EASTERN FLANGE OF BAIKAL SEISMIC ZONE DURING PERMAFROST DEGRADATION
The authors present in a generalized form the results of studies aimed at developing a methodology for predicting the parameters of seismic impacts of the northeast of the Baikal seismic zone during permafrost degradation. Quantitative data on the zoning of seismic hazard in the eastern flank of the Baikal Seismic Zone (BSZ) is shown in the paper. Based on the analysis of previous studies, the use of experimental data, and the necessary calculations, the example of constructing a forecast map of maximum seismic impacts for the natural and predicted state of permafrost is given in the paper. The main goal of the research is to use the data obtained when planning construction in seismically active areas of Eastern Siberia covered by permafrost.
Read MoreEVALUATION OF PERMAFROST THERMAL STATE: MODEL CALCULATIONS AND OBSERVATIONS
Using observations of the surface temperature and the snow depth on the Weather item Taz the thermal state of permafrost at different depths for the period 2006-2013 is calculated. The results are compared with the measured temperature profiles at experimental sites with mineral and organic soil.
Read MoreINFLUENCE OF HYDRO AND LITHO-DYNAMIC FLOWS ON THE CHARACTER OF MODERN EROSION DIVISION OF TERRITORIES
The article considers the problem of identifying the areas of increased denudation on the earth’s surface. Uplifting areas of the same rank are associated with them. The signs of distinguishing denudation areas, features of their structure and the nature of their division are presented. The boundaries of such regions are zones of stress release, potential discontinuities of terrestrial matter of different ranks, where systems of relatively independent (parallel with a shake of 45°) hydro- and lithodynamic flows function. The boundaries of denudation areas of three ranks are shown within the territories of the Volga-Ural and Caspian oil and gas provinces. Obtained information on the areas of denudation can be used for identifying potentially dangerous places where the restructuring of hydro- and lithodynamic flows of different ranks and the intensification of erosion processes are possible.
Read MoreGEOCHEMICAL SIGNS OF OIL AND GAS PRESENCE IN NORTHEAST YAKUTIA
Intermountain and coastal cavities located in the Upper Kolyma mountain-folded region of the northeastern part of the Republic of Sakha (Yakutia) are the most promising areas in the region regarding hydrocarbon raw materials. This article presents the results of the generalization of numerous data based on the research on surface geochemical testing of rocks, water, gases carried out in different years within the program of direct searches for oil and gas. Geochemical studies revealed many signs of gases, oils, bitumen presence, which, given the poor knowledge of the north-eastern part of the Republic of Sakha (Yakutia), indicate the possibility of discovering the hydrocarbon deposits.
Read MoreLANDSCAPE OF THE MONGOL-SIBERIAN REGION AS A RESULT OF INTERACTION OF EXTERNAL AND INTERNAL EARTH PROCESSES
The morphostructural features of the Mongol-Siberian region are of great interest when it comes to the study of the dynamics of neo-tectonic development, a significant contribution to which is made by modern vertical and horizontal movements. In this work, the geo-information analysis of a digital elevation model is carried out, and areas of sedimentation and denudation are highlighted. The spatial configuration of the selected regions is the result of the complex interaction of the Earth’s hard shell and its atmosphere. The mass volume generated in the areas of drift and accumulation characterizes the complex structure of the exogenously active layer, which is affected by a complex of exogenous processes. The results of the surface analysis allow, to a first approximation, estimating the ratio of the thickness of the lithosphere and asthenosphere in areas with different conditions of sedimentogenesis.
Read MoreRESEARCH OF QUANTITATIVE CHARACTERISTIC OF DRAIN ON ESTUARY SECTIONS OF RIVERS OF THE BLACK SEA COAST IN THE REPUBLIC OF ABKHAZIA
The article considers hydrological characteristics of estuarine sections of the rivers of the Republic of Abkhazia that flow into the Black Sea. The work is based on practical data from field observations carried out in July-August from 2014 to 2017. During field studies in estuarine sections of rivers in cross section, the depths and local velocities in the stream were measured. Based on the data obtained, the water discharge for each river was calculated. This article may be useful to a wide range of people: students and specialists involved in the hydrology of estuarine sections of rivers.
Read MoreLABORATORY TESTS OF AFI ACID COMPOSITION OF LONG-TERM ACTION FOR HIGH-TEMPERATURE POLYMICTIC COLLECTORS
The aim of this work is to search for and evaluate the effectiveness of the acid composition of prolonged action. High reservoir temperatures require the use of process fluids of a delayed reaction with reservoir rock during work to intensify the influx of oil.
The main tasks of the laboratory work was to evaluate the dissolving ability of one of the acidic compounds of the “AFI” line, to assess the change of its pH when reacting with carbonate rock at temperatures of 24 and 87 ℃, as well as its compatibility with the formation fluid with the addition of various surfactants.
In conclusion, the article outlines plans for further research.
Read MoreREDUCED WATER FLOW RATE OF ADJACENT ROCK MASS WITH THE USE OF TECHNOLOGY OF HYDRODYNAMIC CLEANING OF CLOSED PIPE DRAINING
The object of the study is water inflows from the upper water-bearing layer of the instrument mountain massif of the Sokolovsky quarry and the state of closed pipe draining. The purpose of the work is to look into the change in water inflows after hydrodynamic cleaning of horizontal pipe draining, to evaluate the extent and frequency of blockages of pipes. Research methods: Analysis of the mountain-geological conditions of the Sokolovsky open pit mine array, measurements of water inflows at the exits from horizontal pipe draining before and after pipe cleaning, as well as hydrodynamic pipe cleaning. As a result of the studies, extended, clogged sections of pipes were established, drainage capacity was increased, a forecast of water reduction in the instrument array of the upper horizons of the Sokolovsky quarry was made, and recommendations were made for maintaining effective drainage at the upper horizons.
Read MoreCURRENT STATE AND PROBLEMS OF ESPECIALLY PROTECTED NATURAL TERRITORIES OF THE CENTRAL YAKUTIA
The Especially Protected Natural Territories (EPNT) of the Central Yakutia are presented by 3 natural parks, 14 resource reserves which were included into EPNT system (Ytyk kere sirder) and are under authority of the Government of the Republic of Sakha (Yakutia). Problems of sites of OOPT it is forest fires, inaccessibility for their control. Their decision requires acquisition of small aircraft by the Government RS(Ya) coordinated interaction with Management of Forestry of the Russian Federation and satellite monitoring of the Russian Federation.
Read MoreEFFECT OF DYNAMIC LOAD ON THE FORMATION OF MICROFRACTURING IN GRANITE
The effect of dynamic blasting loads on the formation of microfracturing in granite is discussed. Changes in microfracturing parameters in granite in situ and after blasting dynamic loads are shown. It has been found that the microfracturing of rocks under natural conditions and after dynamic blasting loads is characterized by changes in the concentration of microfractures by their size, which is due to the statistical distribution of heterogeneities and the lit-par-lit coalescence and enlargement of microfractures. The study conducted can provide the methodical basis for developing dimension stone quarrying technology on granite deposits.
Read MoreASSESSMENT OF STABILIZATION ACCUMULATIVE LANDFORMS IN THE SEASIDE AREA OF WESTERN CRIMEA
The results of field and analytical soil examination on sandbar seven lakes Evpatoria group presented in this article. The estimation of the age of modern soil on accumulative forms the coasts. The structure of the composite indicator which reflects the degree of maturity of the morphogenetic soil characteristics in four soil characteristics (humus horizon thickness, organic carbon and total phosphorus, as well as a sum of elements that accumulate in soils). It has been established that the soil degree of dynamic contact zones morphological and geochemical maturity not coincide.
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