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Geomagnetic disturbances and their associated phenomena can be an important parameter as data input in climatology studies and climate change. This paper is a preamble to a deliverable "Development of a catalog on the typology of geomagnetic variations based on records from the Surlari Geomagnetic Observatory" within the Space Weather project which is part of the complex multidisciplinary project „Institutional capacities and services for research, monitoring and forecasting of risks in extra-atmospheric space” wh...

One of the most important components of monitoring any object is to determine the degree of its pollution. Current and accurate information on the quality of water bodies and soils is the basis for regulating the activities of water users and land users, ensuring measures for the rational use of natural resources, informing the relevant authorities and the population about possible dangerous situations. Surface waters, like agricultural households, are strategic renewable natural resources of Ukraine. A characteri...

Debris flows are considered as flows of highly liquefied sediments in mountain areas, usually triggered by intensive rainfall or snowmelt. They move rapidly through the transport channel or a gully and accumulate the debris material on a less slopping or flat areas, forming a debris fan. Often debris flows occur suddenly and could affect infrastructure as well as to influence human activity and life. This determines the growing need to deepen the research of the debris flows and to take into account the peculiarit...

UNESCO’s Global Geopark Network reflects the importance of geo-heritage for society. The wide range of characteristics and the varied connections to the local ecology and culture are significant for their individual management. The aim of this article is to use comparisons between Geoparks as a step toward a generic, conceptual model that can be adapted and used to understand the crucial, functional relationships between system variables and how these variables can be optimized for stainable management. A general ...

The seismic surveys, carried out in various stages, highlighted two domes, placed on the eastern flank of the outpost of the Eastern Carpathians, in the Pralea - Focsani Depression. According to the Bouguer and filtered gravimetric images, the two domes (Fitionesti - Trotusanu and Movilita) are placed approximately 12 km east of the axis of the outpost, on a single major gravimetric maximum. But, while the south-eastern dome (Movilita) determines an important local gravimetric maximum (+6 mgal. On the residual gra...

Acid tar lagoons (ATLs) are a common source of groundwater pollution in industrialized countries worldwide. Even after recultivation, the spatial extent of the residual environmental pollution from such lagoons is often unknown, as the monitoring of groundwater is mostly done in discrete locations ? monitoring wells. Shallow surface geophysical methods, such as ground penetrating radar (GPR) and electrical resistivity tomography (ERT) are often used in monitoring groundwater and soil contamination. The greatest va...

The study area is located in northern Bulgaria in the northwestern part of the town of Kozloduy, Vratsa province. From an engineering geological point of view, the region falls within the Lom Engineering Geological Area, which is characterized by the presence of loess sediments (silty clay sands and sandy clays), which are with high porosity, non compacted and susceptible to collaps?. Other dangerous engineering geological processes are landslides and river erosion. The Kozloduy lowland is one of the Danube lowlan...

The article deals with the geotechnical design and assessment of the foundation of a statically difficult bridge structure founded in complicated engineering geological conditions. Bridge structure No. 223 is part of the D3 motorway situated above the Hricov reservoir near the town of Zilina (Slovakia). The realized engineering geological survey showed that the geological composition of the subsoil is nonhomogeneous and complicated (occurrence of Quaternary soils and Mesozoic rocks). The physical and mechanical pr...

The issue of suitability the territory for agricultural use has always been an important for rational land use organization. One of the factors in this assessment is the slope of the territory as an indicator of its suitability for growing crops. For instance, in Ukraine, the law prohibits plowing slopes steeper than 7 degrees. Traditionally, the method of assessing the suitability of the territory for agricultural use includes several stages: 1) identification of zones with different slope steepness and degree of...

Our paper describes a case study, on a 27 km-long section of the Moldova River in Romania, on which floods often occur. Floods are some of the most disastrous phenomena caused by combined factors: atmospheric and hydrological with significant repercussions on the environment, with great material damage and loss of life. According to this application, GIS technology is a remarkable solution that can solve rationally, intelligently and efficiently the increasingly difficult problems related to these phenomena, to th...

We have proposed an approach to establish spatial patterns on the application of graphs theory. Traditionally, the theory of graphs is used in spatial studies to quantify the geographical position and its various aspects. Graph theory is a section of qualitative geometry, the differences of which are that it operates with dimensionless quantities, does not use the concepts of angle, and line length. It operates with spatial elements - points, lines, surfaces, volumes, and relations (connections) between them. Diff...

The modern world is on the verge of change - the models of economic development that have existed for more than one decade are being replaced by new systems that will provide humanity with not only a bright present, but also the future. We are talking about a green economy, with equal attention not only to people, but also to the world around them. The green economy and its competitiveness is a global and European opportunity to overcome international economic problems, accompanied by a more lenient attitude towar...

Ground level ozone (O3) is a photochemical pollutant with harmful effects on human health, vegetation and ecosystems. The focus of this work are ozone data measured at the synoptic station Ahtopol, a rural site at the southern Bulgarian Black Sea coast. The surrounding area is without big anthropogenic sources of air pollution, rich in biodiversity and protected zones by NATURA2000. From our summer campaigns data collected during the last years, we have selected for analysis July 2018 – a summer month with well-ex...

Sacidava archeological site is located in the Dobruja region, Romania, on a hill on the right bank of the Danube - the Musait point, located at about 5 km northeast from Dunareni village. The Roman Sacidava was part of the province of Scythia Minor, at its southern limit, and belonged to the military complex (limes) built along the Danube since the 1st century AD. The fortress has had an uninterrupted evolution from the beginning of the 2nd century AD until the first quarter of the 7th century AD, being one of the...

This report is a case study on use of Electrical Resistivity Tomography (ERT) alongside other methods to have a better understanding of surface depressions and their formation in gypsum karst region of Latvia. Study territory is well known gypsum karst region. It is a relatively flat area with up to 5m thick Quaternary cover overlaying Upper Devonian Salaspils Formation gypsum sediments. Previous studies have identified several sinkhole formations in the area. Remote sensing methods like analysis of Digital Elevat...

Transitional (brackish) water bodies host extremely vulnerable ecosystems. They are highly sensitive to pollution, changes in the water currents, nutrient levels, etc. Over the course of the 20th century in Bulgaria, many of them were purposely drained or strongly altered. Today, these fragile ecosystems account for just 0.1% of Bulgaria’s area, and hence they are listed among the country’s top priority nature conservation sites. The long-term preservation and survival of numerous rare or threatened hydrobionts de...

Health risk should be considered a key component in the environmental safety,especially in urbanized territories with developed industries.The research aim was to assess health risks in a city with developed metallurgic andpulp and paper industries in order to substantiate future activities aimed at protectinghuman health and the environment.Bratsk was chosen as a research object since it is a large industrials center located in theEastern Siberia in the Russian Federation; the city population is more than 200 tho...

Oilseed processing technologies include a sequence of intensive multiple heat treatments of seeds, oil and intermediate products. The optimization of these processes largely determines not only the price, but also the quality of the final products. Heat and mass transfer in multiphase multicomponent media are very complex. It is not yet possible to build adequate models of all processes theoretically. The thermophysical properties of the media under study change significantly with heating and changing pressure. Ne...

Air pollution is a problem today, and it is essential to know how high it is. By increasingpeople's standard of living, increasing the number of factories, cars and citizens, it ishelpful to know how much pollution is distributed and whether it does not exceed thestandards allowed for pollution. It is necessary to investigate air pollution with heavymetals in Jelgava by identifying data from areas. In preparing the analysis, it is possibleto assess whether air quality is adequate and does not exceed pollution stan...

Heavy mineral concentrations formed in fluvial deposits present the signature of the mineral provenance and of the hydraulic sorting during transport and accumulation. The sedimentary discharge of the Danube River has been preferentially deposited due to the mineral physico-chemical properties, such as size, morphology and density, as well as local hydrodynamic factors. Besides these natural aspects, the recent modifications of the Danube and its deltaic branches are associated with a significant remodelling of th...

The lack of direct measurements (the most accurate way to determine characteristic high flows) has posed the need to look for other hydrological methods that are sufficiently reliable. The regionalization is an indirect hydrological approach for specific high flow determination used at ungauged river stretches. Usually the hydro-technical constructions or other important economic activities connected to the water use are the main reason necessitating the study of characteristic high water on rivers. For the purpos...

The article deals with the problems of designing multi-channel high-frequency signal generators for the transceivers of unmanned aerial vehicles (UAVs). It is proposed to use high-speed digital-to-analog converters to increase the output frequency and improve the noise characteristics of UAV transceivers. The possibility of using special operating modes used in modern high-speed direct-to-analog converters (DACs) for digital generation of broadband signals is shown. Mathematical models of noise characteristics at ...

The use of unmanned aerial vehicle systems (UAVs) for the acquisition of images, which are then processed by the photogrammetric method SfM (Structure-from-motion), is increasingly established as a suitable workflow for obtaining high-resolution topographic data (HRTD). Using PPK (Post-Processed Kinematic) solutions for UAVs can provide accurate parameters for the external orientation of the cameras used in UAVs for photogrammetric capture. The use of such an approach has the potential to become an alternative to ...

Dissemination of the hoaxes and misinformation can exacerbate the consequences ofindustrial accidents with disastrous consequences for the environment. There arewarning examples from the past that the intentional misinformation may cause fatalconsequences. Three major industrial incidents introduced proofs the importance of thecorrect and true information. It demonstrates the sensitivity of any event on thecorrectness of information sources especially at the beginning of the accident in thecritical time for the pe...

Flood events, as well as the channel and floodplain landforms are crucial for the transport and spatial distribution of heavy metals and metalloids in soils in the river valleys. The paper outlines the results of obtained preliminary indications about the flood proneness of two study areas located in the valleys of Ogosta River near the village of Gorna Kovachitsa and Lom River near the village of Vasilovtsi (NW Bulgaria) based on hydro-geomorphological indices. The detection of flood-prone areas has been done usi...

Catalytic activity of commercial ruthenium catalyst (ruthenium (5%) supported on alumina (Ru5%Al2O3)) on renewable hydrocarbon production from stearic and oleic acid via hydrotreatment was investigated. Moreover, the effect of Ru5%/Al2O3 on aromatic (ethylbenzene) and saturated cyclic hydrocarbon (cyclohexane) structure modification under the same reaction conditions was determined. Full conversion of fatty acid feedstock into pure hydrocarbons were achieved over ruthenium catalyst. Linear alkanes (n-pentane to n-...

Droughts are a natural phenomenon with a fairly high frequency worldwide. Their evolution generates, through the water deficit, a state of vulnerability at the level of natural and social components. In areas dependent on groundwater resources this vulnerability is transformed in a high social and economic risk. In this situation can be included the eastern part of Romania where over 50% of the population, predominantly in rural areas, is supplied with groundwater. In order to highlight the negative effects of a n...

The researches were carried out in a catchment with a pronounced torrential character and flood risk (Slanic catchment) located in the Siret catchment, Romania. Precipitation data were available from the monitoring network of the Siret Water Basin Administration, from 2019 and 2020; given their continuity they were considered suitable to allow hydrological modeling. A hydrological modeling was followed, that simulates the rain-drainage processes of the water systems, given that in the studied catchment there are a...

The increasing world population demand for bioeconomy products intensify the nitrogen cycle and encourage eutrophication in water bodies. Global climate change and land use transformation have a significant impact on the hydrological cycle. Integrated water management in the catchment area is a sustainable solution for catchment area development and balancing economic and environmental interests. The aim of this study is to develop an optimization model for sustainable lake management. The case study is done in eu...

The article is dedicated to the study of hydrometeorological parameters on a stationary oceanographic platform in the Black Sea. The research paper contains the description developed in the Marine Hydrophysical Institute’s complex for measuring meteorological parameters (wave height, wind speed and direction, free-air and sea temperature, barometric pressure, relative humidity). The measurements were carried out on a stationary oceanographic platform located in the coastal zone of the southern coast of Crimea at a...

Upstream hydrocarbon exploration and production remains an important economic sector providing the necessary raw materials for several areas of Russian economy. To enhance the resource efficiency and environmental performance of the sector, researchers and practitioners develop approaches based on Best Available Techniques (BATs). In Russia, the BAT concept has been rapidly developing since 2014. Unlike in the European Union, in Russia, upstream hydrocarbon exploration and production sector is regulated by IPPC-li...

In the investigation of gas explosion events resulting from combustible gas leakage, often the formation of the explosive atmosphere at the location of the ignition source is less highlighted, usually being calculated the concentration of combustible gases at the entire volume affected by the explosion; depending on the distance between the gas source and the ignition, the complexity of the geometry (volumes occupied by various solid bodies) and the air currents in that volume (convective currents generated by hea...

The immobilization of glucose oxidase (GOx, enzyme of oxidoreductases class) was carried out on non-magnetic (SiO2, Al2O3) and magnetic mesoporous oxides (Fe3O4-SiO2, Fe3O4-Al2O3). Magnetic supports were synthesized by in-situ crystallization of magnetite nanoparticles in mesopores. The surface of the support was preliminarily modified with amino groups and the glutaraldehyde was used as a linker for covalent binding of the enzyme. The supports and biocatalysts were fully characterized using a combination of physi...

At present, surface runoff represents serious environmental problems in the urban environment, causing adverse effects on socio-economic and natural systems. Surface runoff is a complex source. The creation of surface runoff is described by various hydraulic hydrological processes, from the impact of water on the surface to the mouth into the sewer network or recipient. The formation of the precipitation-runoff process depends on several factors. Land-use change is a key factor that significantly affects the quali...

In this study SURFEX land surface model is used coupled to RAPID river routing model in order to investigate the influence of alternative ground and rooting depth, soil texture and land cover maps on the ability of the coupled system to adequately simulate the river flow in Upper Arda River basin in Bulgaria. This was done by comparing the statistical scores of computed from the model data series against measured streamflow discharge series: that is scores of simulations using former soil texture maps from Harmoni...

Due to land use practices, there is a change in the environmental landscape in Haridwardistrict which has a great impact on its weather which in further also impacts vegetation.Vegetation Indices are considered as indicator for temporal variation of vegetation sofor better consideration of this dynamics, relation between vegetation and climateshould be studied more extensively. This study evaluates the annual dynamics undervegetation cover and its impact on climatic factor. It is carried out by establishing therel...

The article analyzes the effect of the radioactivity of some crude oil components on the environment in the Moine?ti geological area. The analysis of the equivalent dose flow measurements shows the influence of contaminated equipment, in the areas adjacent to them, where when measuring the soil were obtained values of dose flow between 0.2 - 3.0 ?Sv/h, both at a height of 10 cm from of soil, as well as at a height of 100 cm from the ground, with a maximum of 3.5 ?Sv/h. By interpreting the results of the determinat...

The formation of a groundwater aquifer in a unique territory disturbed by the quarrying of a phosphorite deposit in the southwest of the Leningrad region, built up with industrial facilities for ore processing, auxiliary production, and waste storage is considered. During the quarrying of the phosphorite layer, the hydrogeological section was disturbed, the filtration and capacitive properties of the soils of the aeration zone and water-bearing rocks changed. In the zone of active quarries, during dewatering, the ...

The paper deals with numerical analysis of the stability of an embankment reinforced using a geogrid. The analysis is mainly focused on the impact of the Rinter parameter, which represents the ratio of the soil-geogrid interface shear strength to the shear strength of the soil, on the deformations, and the global stability of the embankment. The properties of the soil-geogrid interface were measured using a modified large size direct shear test apparatus. The biaxial geogrid made of polypropylene with a tensile st...

Regions with scarce freshwater resources, such as North Africa and the Middle East, face significant challenges today and will face even greater challenges in the future as a result of socioeconomic and climatic changes. The Missour Oases in Morocco is one of many arid Moroccan Ocases grappling with increasing water scarcity, which threatens self-sufficiency in agriculture. Efficient water management is required to sustain people's livelihoods. The main aim of this study is to assess the impact of human activities...

COVID-19 has imposed shocks on all segments of food supply chains, simultaneously affecting farm production, food processing, transport and logistics and final demand. It is therefore important to assess the risks, the probability of their occurrence and their impacts in order to develop risk mitigation recommendations. In Latvia, poultry farming as an agricultural industry has centuries-old traditions. Poultry in Latvia are produced both on large poultry farms and on small and backyard farms. There are 21 large a...

The purpose of the paper is to implement a method which can synthesize effective data insertion procedures for structure-independent databases based on the Tentzer model. This is a universal database model, which is based on static reference relational tables, linked in a certain way at the physical data level and the logical structure is a meta structure over it. This method makes it possible to synthesize data insertion procedures for such databases, and as result two types of inhomogeneities will be eliminated ...

Putna-Vrancea Natural Park covers an area of about 30204 ha, being declared Natural Park in 2004, by the Romanian Government Decision no. 2151/2004. Putna-Vrancea Natural Park is located in the Curvature Carpathians and includes one of the wildest mountain areas in Romania, shelters many species of flora and fauna of national and international importance such as: Canis lupus, Ursus arctos, Lynx lynx, Rupicapra rupicapra, Cypripedium calceolus, Taxus baccata, Leontopodium alpinum. etc. The present study highlights ...

Magnesia based cement is known for over 150 years. Compared to Portland cement (PC), magnesium potassium cement (MPC) is more environmentally friendly material, because of its high carbonation capability and a lower environmental impact on the overall ecosystem quality and resources than PC. Fast setting connected with high early strength leads to the satisfying parameters achieved after a few hours. Therefore, MPC finds use as the concrete repair material for buildings, roads or concreting runways, etc. In the pr...

Greenhouse heating during cold seasons is costly as it is high energy consuming. The use of latent heat stored during sunny periods for greenhouse heating could be an interesting alternative in several regions worldwide as in Tunisia. Thus, new agronomic/climatic approaches were developed to produce several crops such as tomato in a sustainable way. In this context, maturity and yield of tomatoes cultivated inside a greenhouse equipped with a new solar air collector with latent storage (IGHLS) were studied in comp...

Arkhangelsk Oblast is a region of The Russian Federation with the most developed forest industry. Here, it used advanced timber harvesting and sawmilling technologies. Arkhangelsk Oblast has a large territory. The area of the region is 330103 km2. The population density is low and amounts approx. 1.91 people per square kilometer. At the same time, about 80% is the urban population. The remaining 20% of the population lives in areas remote from the regional center. Due to a number of circumstances, the infrastructu...

The minerals industry is facing a changing talent landscape. With digitalization and a transition towards a decarbonized economy, a mining industry necessitating new skillsets and with technology cycles that are getting shorter and shorter, the new panorama is transmitting pressure in the need of trained workforce, and mining companies need to ensure that their boards and staffs are properly constituted to support the transformations that the sector is currently undergoing, including fluency in such areas as techn...

Detection of nickel ions in various foods, especially fruits, is very important for the prophylaxis of patients with allergic contact dermatitis to this heavy metal. Currently, there are a limited number of rapid methods for identifying nickel ions, so it is necessary to develop new biosensors in this area, by improving selectivity of ligands and utilization of immobilization elements suitable for nickel ions. The mentioned elements are very important because they can increase the selectivity, sensitivity and can ...

The purpose of this report is to encompass and analyze the advantages of the creation, the implementation and transformation of software product in the production and processing of products. Several main conclusions have been made in the scientific report, with the general conclusion being that based on the computer program developed and implemented in practice, an easier method of work is ensured, while considering the specific pre-production and production processes, as well as processing operations in productio...