SOIL AS A MAIN GEOECOLOGICAL FACTOR FORMING LANDSCAPES

The relevance of the work. At the moment, a stable trend has formed in soil science, according to which the soil is considered and recognized not only as a result that was achieved as a result of the process of soil formation, but also simultaneously as a multifunctional natural structure, which is of colossal importance in terms of the formation of existing landscapes and newly formed and the proper functioning of the ecosystem as such. Purpose of work. Comprehensive and complete analysis of soil as the main geoecological factor shaping landscapes. Methodology of work. Analysis of scientific literature on this topic, synthesis, system-structural method. Method of comparative analysis. Results of work. The article discusses the main ecological functions of soils: global (atmospheric, hydrospheric, lithospheric, general biosphere) and biogeocenotic (ecosystem). The most important biogeocenotic functions of soils are determined by the physical, physicochemical, and chemical properties of soils. It is noted that the physical properties of soils determine such functions as habitat, living space of soil organisms and plants; chemical properties as a source of nutrients and energy; physicochemical properties such as sorption of mineral and organic substances, microorganisms, enzymes, water. Soils in biogeocenoses also perform informational functions, the functions of preserving and maintaining biodiversity, sanitary, etc. Conclusions. Consideration of various categories of soil functions in the system of its biogeocenotic, landscape and biospheric interactions allows us to conclude that the ecological multifunctionality of the soil is its fundamental feature.

HYDROGEOLOGICAL CHARACTERISTICS OF RESERVOIR WATERS OF THE CASPIAN SEA DEPOSITS

Hydrogeological conditions of reservoir waters of oil and gas fields in the northern water area of the Caspian Sea characterize the geological features of the structure of the Northern Caspian shelf, as well as the thermodynamic parameters of the exploitation of productive deposits, production and transportation of oil and gas. Reservoir waters contain water-soluble gases. According to the size of mineralization, the ratio of the main components of the salt composition, as well as the presence of iodine and bromine, reservoir waters can be attributed to a relatively "young" genetic age, subject to secondary geochemical processes of changing the salt composition in interaction with "secondary" migrated hydrocarbons. The physical and chemical properties of reservoir waters are determined by PVT analysis technologies. Hydrogeological and geochemical studies of compatibility with reservoir waters of marine waters injected to maintain reservoir pressures (PPD) during the development of offshore fields in order to increase the oil recovery coefficient (KIN) indicate the absence of colmating secondary sedimentation in mixtures of natural and man-made waters.

INTERCUTTING AND PLANNING OF NATURAL TECHNOGENIC AND GEOGRAPHICAL TERRITORIES WHEN PLACING LINEAR FACILITIES

One of the key problems of territorial delimitation of linear facilities is the presence of a large number of legal acts that regulate certain types of linear facilities. Besides, there is inconsistency of general and special legislation. We strongly believe that when defining a linear facility, it is necessary to take into account the industry specificity of such objects, as well as the presence of natural and technogenic areas, which are an integral part of the technological process of using these facilities. The findings of the study demonstrate that features of a linear facility are reflected in the content and procedure for preparing design documentation for such an object.

GEOLOGICAL STRUCTURE OF THE SURFACE OF THE PALEOZOIC FOLDED BASE OF THE WEST OF THE TURAN PLATFORM

The surface of the folded base of the platforms is an important geological boundary separating rock complexes formed in different geodynamic settings and characterized by different physical properties, which largely determine the patterns of formation of minerals in them. Therefore, determining the depth of its occurrence and morphology is not only theoretical, but also practical. Despite many years of studying the foundation of the west of the Turan Platform, there is no unity among geologists and geophysicists in their ideas about its structure, depth of occurrence and surface structure. In this regard, the aim of the work is to build a structural map of the surface of the foundation of the west of the Turan plate, to identify the main tectonic structures and their morphology. The construction is based on a comprehensive analysis of drilling materials and geophysical data. When drawing up the structural map, all the currently available geological and geophysical material was used, including data from drilling, gravity and magnetic surveys, and seismic surveys of various modifications, which made it possible to perform fairly detailed and reliable constructions. The article provides a detailed description of the surface structure of the folded base of the west Turan platform. The obtained results can be used in solving the issues of oil and gas potential of the studied territory. The folded base of the western Turan plate is a heterogeneous and heterochronous formation, differentiated by the depth of occurrence, which allows for morphostructural zoning of its surface.

GEOECOLOGICAL ASSESSMENT OF CHANGES IN ROCK PROPERTIES UNDER THE INFLUENCE OF TECHNOGENIC FACTORS

Technogenic impact on the geological environment inevitably leads to a change in the properties of rocks. Engineering structures quite often directly interact with rocks, therefore, reliable determination of their properties is an urgent task in construction. From a practical point of view, knowledge of not only the physical and mechanical properties of rocks, but also their characteristics in contact with technogenic impact is of great interest. This determines the relevance of studying the characteristics of changes in the properties of rocks under the influence of technogenic factors. The aim of the work is to consider the issues of changing the properties of rocks under the influence of technogenic factors of the geological environment. Technogenic impact on the geological environment is classified according to various criteria, and is divided into global, zonal, regional and local categories. The authors rightly give preference to the following operating factors: pressure, fluctuations in the stress state, hydrogeological conditions, changes in the composition of groundwater, etc. Particular attention is paid to rock swelling, rock salinization and the influence of various microorganisms on rocks. In the article of the above authors, it is proposed to consider in detail the orohydrographic conditions of the studied geological environment, geomorphological conditions of the territory, geological structure, hydrogeological conditions (upstream, groundwater, interstratal waters), geo-dynamic conditions (all processes and phenomena expressed in a given territory), as well as to study the composition (mineral, granulometric, chemical), the state of rocks (moisture, density, porosity) and properties of rocks (strength, deformation and geological) - for a comprehensive assessment of the surrounding geological environment. Attention is also paid to the dynamic impact, i. e. the factors of liquefaction, thixotropy and other soil deformations are given.

GENERAL GEOLOGICAL BASES OF OIL AND GAS GEOLOGICAL ZONING OF THE RUSSIAN AND FOREIGN RESEARCHERS

The general geological foundations of oil and gas zoning are laid down by Russian and foreign researchers and are carried out according to different principles, which reflects the ambiguity of many researchers ' views on the genetic aspects, the mechanism of formation of oil and gas accumulations, and other issues of oil geology. The development of a sedimentary basin and its transformation into an oil and gas basin is accompanied by complex and long-term intermittent-continuous processes determined by tectonic laws that control the formation of platform, geosynclinal and oceanic structural elements of the earth's crust, within which these basins are located. The zoning scheme is based on a complex of various geological indicators that determine the time and conditions for the generation, migration, accumulation and preservation of hydrocarbon accumulations. When comparing the Russian and international schemes of regional studies, it becomes obvious that the essence of research does not change either in the domestic scheme or in the Western classification.

GEOECOLOGICAL ASSESSMENT OF THE MODERN ZINC CONTENT IN THE SOIL COVER OF THE URBANIZED TERRITORIES OF THE SOUTH OF RUSSIA

Anthropogenic and technogenic processes in the urban environment significantly change the chemical composition of the soil cover. One of such processes influencing the state of the urban soil is the process of soil cover pollution with heavy metals. Heavy metals are biochemically active and highly toxic; they are found in various components of the natural environment, as well as in systems of anthropogenic and technogenic origin. They have the property of accumulation in the body of living beings and have a negative effect on their condition. This group of chemical elements includes lead, zinc, chromium, mercury, copper, iron and other metals. Exceeding the permissible concentration of heavy metals in the soil of an urbanized area and their toxic effects pose a significant danger to humans. Contamination of the soil cover of an urbanized area with heavy metals is associated with the impact of a large number of sources of anthropogenic and technogenic origin, namely, energy and industrial facilities, city infrastructure support systems, zones of construction activities and storage of materials or waste. One of the main highly toxic chemical pollutants of the soil cover of the urbanized territory belonging to the group of heavy metals is zinc «Zincum-Zn». The article describes the results of a 2020 study of the current zinc content in the soil cover of the city of Astrakhan. The relevance of the work lies in the geochemical analysis of the content of heavy metals in the soil of the city of Astrakhan. The aim of the work was to study the modern process of soil contamination of the city of Astrakhan with zinc. The work was based on the task of determining the degree of exceeding the hygienic standards of the maximum permissible concentration of zinc in soil samples. Methods of geographical and ecological research were used in the work, soil samples were collected, followed by determination of the concentration of a substance in each of the soil samples in a certified laboratory. In the course of the work, the indicators of exceeding the maximum permissible concentration of zinc in the soil of the city of Astrakhan were determined and the presumptive sources of pollution were identified.

GEOECOLOGICAL STATE OF THE NATURAL ENVIRONMENT IN THE AREA OF THE ZHENIS OIL AND GAS SECTION OF THE CASPIAN SHELF ZONE

Energy is considered one of the key factors of human development, providing the necessary conditions for its existence and vital activity, the degree of material and economic well-being. The leading position among fuel and energy resources at the present time belongs to oil, as the most productive energy carrier. Overcoming the current economic crisis is associated with an increase in global demand for black gold and an increase in the pace of its production. The involvement of ever-increasing volumes of hydrocarbon resources in production circulation reduces their reserves and leads to the need for exploration and development of ever-new deposits. It is a well-known fact that since the peak of the formation of geological exploration in the 60s of the XX century to the present period, the number of discovered deposits on the onshore part is steadily decreasing, and the number of developments on the shelf is increasing. The offshore zone of the Caspian Sea is a very promising region for the production of hydrocarbons, where the richest deposits have been explored and exploited. However, oil production at sea is much more difficult, more expensive than on land and involves significant environmental risk. The most important tool of environmental protection activities used almost all over the world is an environmental assessment based on a comprehensive analysis of the most likely impact of the proposed activity on the environment. This procedure is carried out in order to establish the compliance of the planned economic activity with environmental requirements and to determine the admissibility of the implementation of the object and to prevent possible negative impacts of this activity on the environment and the associated social, economic, environmental and other consequences. The constant increase in demand for hydrocarbon resources and their involvement in economic turnover, as well as the reduction of reserves and environmental risks associated with their production and exploitation of deposits have determined the relevance of this article. The purpose of the work was to identify the features of the current ecological state of the marine environment in the water area of the planned development of hydrocarbon deposits.

CURRENT STATE OF THE DYNAMICS OF CHANGES IN THE AREAS OF LAND FOR SPECIAL PURPOSES IN THE SOUTH OF RUSSIA

Land resources are one of the most important resources in the environmental management system. This resource is necessary for almost all types of human activity: agriculture, construction, industry, mining, recreation, etc. According to the intended purpose in the Land Code of the Russian Federation, lands are divided into seven categories, differing from each other in the economic and legal regime of use. One of these categories is agricultural land. This category of land includes territories necessary for obtaining agricultural products or other purposes related to agriculture, as well as they are geographically distributed outside settlements. Lands of this category of designated purpose are characterized by a high level of anthropogenic impact (agro-preparatory processing of the territory, obtaining agricultural products, placement and grazing of livestock), which significantly affects the indicators of natural biodiversity downward. In order to study the state of land resources in the South of Russia, an analysis was made of the dynamics of changes in the area of agricultural land in the regions that are part of the Southern Federal District. The relevance of the work lies in the study of the current state of agricultural land in the South of Russia. The aim of the work was to study the dynamics of changes in the area of agricultural land in the period from 2009 to 2019. Statistical and analytical methods of geographical research were involved in the work, information was searched for on the state of lands of this category of lands in a certain period of time. In the course of the work, information was collected on the state of agricultural land in each of the regions that are part of the Southern Federal District and the features of changes in the area of land of this category were determined.

MAIN DYNAMICS OF ANTHROPOGENIC IMPACT ON AQUAL COMPLEXES

The purpose of this work is a component-wise analysis of the dynamics of anthropogenic impact on the aquatic complexes of the Lower Volga, which includes such indicators as: COD, BOD5, iron, copper, zinc, nickel, mercury, molybdenum, phenols, petroleum products, nitrites, hydrogen sulfide and sulfides and other Methods. The following methods were used in the work: cartographic, comparative-geographical, mathematical-statistical, geoinformation. Results. As a result of the conducted geoecological monitoring, the qualitative and quantitative characteristics of the surface waters of the Astrakhan region were considered, and areas of pollution that were environmentally hazardous to the health of the population were identified. Conclusions. The quality of the Lower Volga waters according to the comprehensive assessment of pollution was determined by the class "dirty", category "a", the excess of MPC was for COD, BOD5, iron, copper, zinc, nickel, molybdenum, mercury, phenols, oil products and sulfides and nitrites. Oxygen regime and pH regime were within normal limits.