SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings最新文献

{"title":"BOUNDARY KNOT METHOD SOLUTION OF GROUNDWATER FLOW IN UNCONFINED AQUIFER","authors":"J. Mužík","doi":"10.5593/sgem2022/1.1/s02.012","DOIUrl":"https://doi.org/10.5593/sgem2022/1.1/s02.012","url":null,"abstract":"The groundwater flow problems are often solved using numerical models. The numerical models based of known fundamental solution, known as Trefftz methods, represents one of the efficient approaches used to solve potential flow phenomena described by the Laplace differential equation. The Trefftz-like methods, such as the boundary element method (BEM), represent a very efficient approach to solving groundwater flow problems. However, the implementation of BEM is cumbersome because of the fundamental solution singularity, and also there is a very limited number of software suites using BEM. The localized boundary knot method (LBKM) eliminates the drawback of boundary meshing and evaluation of singularity of fundamental solution as in BEM. The LBKM uses the known general solution to avoid the singularity evaluation, and the dual reciprocity approach to evaluate the true solution residual. This paper proposes a numerical model that implements the localized boundary knot method (LBKM) for 2D groundwater-free surface flow simulation.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128185566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DETERMINISTIC EARTHQUAKE SCENARIO FOR THE CITY OF VARNA","authors":"D. Solakov, S. Simeonova, P. Raykova","doi":"10.5593/sgem2022/1.1/s05.060","DOIUrl":"https://doi.org/10.5593/sgem2022/1.1/s05.060","url":null,"abstract":"In the present study deterministic earthquake scenarios for the city of Varna - the thirdlargest city in Bulgaria are presented. By deterministic scenario, it is mean a representation of the severity of ground shaking over an urban area, using one or more hazard descriptors. The assessment of seismic hazard and generation of earthquake scenarios is the first step of seismic risk evaluation and society prevention. \u0000Seismic history of Varna shows that the hazard for the city is mainly influence by the earthquakes occurred in the seismogenic zone Shabla (Kaliakra fault system). The local ground shaking levels are computed using the six ground motion prediction equations (GMPE�s) for tectonically active regions that are previously selected. A reliable geotechnical zonation of the city of Varna was incorporated in the earthquake scenario generation. Deterministic ground shaking scenarios for the city of Varna are generated for two scenario earthquakes with different location and magnitudes are considered. The generated scenarios are described in terms of MSK (=EMS98) intensity, peak ground acceleration and velocity and in spectral accelerations for Sa (0.3s) and Sa (1.0s). The results in PGA and MSK intensity for scenario MW7.2 quake located on strike slip Kaliakra fault are mapped. The estimated peak ground accelerations for MW7.2 quake vary between 0.07 and 0.14 g.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130068995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"POSSIBILITIES OF SEWAGE TREATMENT TEMPORARILY ACCUMULATED IN SUMPS","authors":"J. Hrudka, R. Wittmanová, Š. Stanko, A. Raczková, I. Škultétyová","doi":"10.5593/sgem2022/3.1/s12.19","DOIUrl":"https://doi.org/10.5593/sgem2022/3.1/s12.19","url":null,"abstract":"The inhabitants produce the sump waters and accumulate temporarily in the sumps. This is sewage that must be treated before it is discharged to surface waters. Slovak legislation does not allow the discharge of such waters into the soil. The possibilities of sump water treatment are given by the water management equipment of the given locality where sewage water is produced. The most common treatment method is transported at municipal wastewater treatment plants, which are, however, largely congested. In many cases, the sump water is no longer able to receive in WWTP. Another way is domestic wastewater treatment plants, and also they are wastewater treatment plants exclusively for sump waters. Sump waters have a predominantly high organic content and therefore their quality needs to be constantly monitored. The most important monitored characteristics of sump waters are COD (Chemical Oxygen Demand) and BOD5 (Biological Oxygen Demand). The high concentration of these substances in the sump water can adversely affect the processes at the municipal wastewater treatment plant. \u0000Due to the rapid development of rural settlements without a functioning sewerage system, it is necessary to intensify or adapt the existing wastewater treatment plants. However, many engineers see the solution to this problem in the construction of separate wastewater treatment plants for sump waters.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134328793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RESEARCH RESULTS ON BIOLOGICAL ACTIVITY OF NEW GEORGIAN PLANT GROWTH BIOSTIMULANTS � BACTOFERT-L BLATT, BACTOFERT-L BODEN, AND BACTOFERT �L Si","authors":"G. Dumbadze, Roza Lortkipanidze, Nunu Chachkhiani-Anasashvili, N. Alasania, L. Jgenti","doi":"10.5593/sgem2022/5.1/s20.047","DOIUrl":"https://doi.org/10.5593/sgem2022/5.1/s20.047","url":null,"abstract":"The significance of organic plant growth stimulants, in the development of sustainable agriculture and increasing the fertility of degraded soils has sparked the interest of scientists and practitioners working in the field of agriculture in recent decades. On the world market, there are numerous plant growth biostimulants of various origins and compositions, as well as numerous research analyzing their impacts and roles. \u0000The study aimed to determine the novel biological activity of the new Georgian biostimulants Bactofert-L Blatt, Bactofert-L Boden, and Bactofert-L Si, which were developed by \"Geofert\" LTD. For this reason, Cucumber seedlings were obtained, and their growth intensity was studied according to root and stem length, leaf assimilation surface, and seedling mass under the action of 0.15 percent solution of biostimulants in laboratory conditions. Other biostimulators of Georgian and foreign origin available on the Georgian market were also included in the study to examine the biological activity of biopreparations.The research was carried out using the GOST-54221-2010 technique. In comparison to the control variant and other experimental stimulants, studies have shown that all three Georgian bio preparations - Bactofert-L Blatt, Bactofert-L Boden, and Bactofert-L Si - have strong biological activity. The best biostimulator for plant growth boosters has been determined as Bactofert-L Boden.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131500752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FOOD SPECTRUM OF THREE FISH SPECIES FROM THE MUGILIDAE FAMILY IN BRACKISH WATER ALONG THE BULGARIAN BLACK SEA COAST","authors":"R. Bekova, B. Prodanov","doi":"10.5593/sgem2022/5.1/s20.025","DOIUrl":"https://doi.org/10.5593/sgem2022/5.1/s20.025","url":null,"abstract":"The food spectrum of three fish species from the Mugilidae family in different age groups was studied. The samples were collected in 2019 - 2021 from the river estuaries and the coastal brackish lakes at the Bulgarian Black Sea coast. The research aims to establish the food spectrum of mullets and thus make a connection between food components. The results show that the predominant groups in the stomachs of the three mullet species are detritus, zoobenthos (Rissoa sp. And Trochammina inflate - 64.28%) and macrophytes (Cladophoraceae family - 53.14%). Several potential toxic species were also found: Amphora coffeaeformis, Pseudo-nitzschia delicatissima, Pseudonitzschia seriata, Prorocentrum cordatum, E. pyriformis, P. minimum, Protoperidinium crassipes. For the first time along the Bulgarian Black Sea coast, in the stomachs of mullet fish, the presence of particles (less than 2.5 cm) from the category \"Artificial polymers\" was observed. The most common in the stomachs of mullet are macrophytes of the family Ulvaceae - 45.5%; family Cladophoraceae - 35.5%; from phytoplankton - Navicula spp (97.09%); of zoobenthos: Nematoda g.sp. - 49.3% and Trochammina inflate - 32.3%.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130937374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STUDY ON THE CORRELATION BETWEEN INFRASTRUCTURE PROJECTS AND WILDLIFE ROADKILL IN ROMANIA","authors":"R. Nicolae, S. Popescu","doi":"10.5593/sgem2022/5.1/s20.055","DOIUrl":"https://doi.org/10.5593/sgem2022/5.1/s20.055","url":null,"abstract":"Infrastructure projects can be the source of multiple environmental impacts, such as roadkill, habitat loss, and habitat fragmentation. Specialty studies have shown that almost 194 million birds and 29 million mammals may be killed each year on European roads. \u0000In our country, the dense network of national roads often causes roadkill events, with the following possible impact forms: reduction of wildlife species populations, damage to population fitness, changes in the spatial distribution and migration routes. At the same time, the presence of an animal on the road can also lead to a degree of discomfort and endangerment for traffic participants. \u0000At the same time, highways have their fair share of roadkill events. In Romania, the highway network includes only about 961 km built, the investments in the field of infrastructure being made mainly to connect the east (the Black Sea coast) with the west (the connection with other countries from the European Union). Nowadays, highway networks are being built to become mobility lanes to other regions of the country and exits to other neighboring countries. \u0000Recently, there is an increased focus on the environmental component for large infrastructure projects at national level, with solutions that can be implemented from the feasibility study phase. \u0000The paper deals with wildlife roadkill findings, associated with different infrastructure projects throughout the country, correlated with the proposal of measures to stop or reduce such negative events.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133053206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE SPATIAL AND TEMPORAL DISTRIBUTION OF LEAD IN SNOW: CASE STUDY OF JELGAVA CITY","authors":"Kristaps Siltumens, Sindija Liepa, J. Burlakovs, O. Purmalis, Viktorija Visocka","doi":"10.5593/sgem2022/4.1/s19.53","DOIUrl":"https://doi.org/10.5593/sgem2022/4.1/s19.53","url":null,"abstract":"The growing global population is creating high demand for transport and the various goods industries, which produce lead-generating emissions from air pollutants. The increase in lead concentration is very dangerous because it affects the nature and human health around us. The great concern for human health and the environment has contributed to research on lead concentrations around us. \u0000The aim of the study is to clarify the prevalence of lead in Jelgava between 2018 and 2021. The winter period was selected for this study, as it is possible for snow to collect samples from the urban drilling environment, where lead dust from urban pollution lands on the snow surface. The snow was collected from 60 points in the city, where high traffic intensity, railway infrastructure and various types of industry are found. \u0000The samples were analysed over a four-year period, with a total of 240 samples. Samples were collected at each point, creating a 15 x 15 cm area in the snow and collecting all the snow to the soil from the established area. Below, these snow samples were stored for a few days in a refrigerator with temperatures ranging from +3 to +5 0C and transported to a laboratory where lead concentrations were determined in snow samples. Lead concentrations in snow samples are determined to determine the intensity of their release in nature, linked to the rapid increase in anthropogenic activities in the last two centuries. Cases of increased lead accumulation have already been observed in wild animals. It is therefore necessary to carry out detailed studies on lead concentrations in nature and their potential for increase. \u0000In the analysis of lead concentrations, it was found that the highest lead concentrations were in 2018, when their median was 3.59 ?g/L, with a maximum value of 51.8 ?g/L. The smallest lead concentrations were found in the 2020 measurements, when their median was 0.17 ?g/L, with a maximum value of 6.65 ?g/L in the analysis. The data collected, it can be concluded that there are very large variations in data and unpredictable concentrations associated with the intensive traffic of vehicles, industry, road repairs and fireworks at different festivals.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133382119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TOWARDS LOW-CARBON EMISSION BIOTRICKLING FILTRATION OF VOLATILE ORGANIC COMPOUNDS FROM AIR: AN ARTIFICIAL NEURAL NETWORK APPROACH","authors":"G. Soreanu, I. Cretescu, E. Drăgoi, D. Lutic, F. Leon","doi":"10.5593/sgem2022/4.1/s19.55","DOIUrl":"https://doi.org/10.5593/sgem2022/4.1/s19.55","url":null,"abstract":"In this study, a classical biotrickling filter (based on compost microorganisms) and an upgraded biotrickling filter (based on a mixture of compost microorganisms and microalgae Arthrospira platensis PCC 8005) are evaluated in terms of carbon dioxide production, during their use for volatile organic compounds (VOCs) removal from air. The experiments were performed using acetic acid vapors as model VOC and the biotrickling filter (BTF) performance was observed at different VOC concentrations, gas flowrates and pH values. Although the removal of acetic acid vapors was maximum for the both biosystems, the carbon dioxide production was different. The influence of the microorganisms� types and of the operating parameters on the carbon dioxide production are correlated via artificial neural network algorithms, depicting the most favorable conditions towards a low-carbon emission biotrickling filtration process for VOCs removal from air.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133676656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE ROLE OF PHYSICAL FEATURES OF THE SITE IN THE DESIGN OF MILITARY-RESISTANT BUILDING","authors":"Anna Vardanyan","doi":"10.5593/sgem2022/5.1/s20.062","DOIUrl":"https://doi.org/10.5593/sgem2022/5.1/s20.062","url":null,"abstract":"Military resistant architecture (MRA) is a trend to protect civilians, settlements, the environment, and existing buildings from the strikes happening during the war. The development of military technologies and armaments brings with it the need to define new urban security solutions. In this case, it is very important to analyze the physical characteristics of the building and its surrounding, such as the tectonics and physical parameters of the building�s site. To secure the buildings from new, sixth-generation warfare weapons, the architectural solution must follow certain principles according to the building material, construction system, especially composition, landscape, etc. Thus, possible building forms of the site�s physical characteristics such as platonic forms, and irregular forms expressed in the terms of the blocked, courtyard, angular and polarized types of composition are discussed in the presentation. The mentioned forms are observed by smooth, slopping, and combined placement of the terrain (See Diagram 1). The strike direction is supposed to be from the right side and above the building. The presentation includes an introduction and historical overview, threat and risk assessment, and analysis, as shown in the diagram. The situation is discussed including the above-mentioned parameters: the environment, the landscape, the shape and the shell of the building, as well as the type of the roof. As a result of the analysis, several conclusions on possible risk management, were presented.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134609076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SELECTING THE OPTIMAL LIQUEFACTION CYCLE FOR CRYOGENICS ENERGY STORAGE","authors":"C. Ionita, A. Dobrovicescu, Daniel I. Dima","doi":"10.5593/sgem2022/4.1/s17.18","DOIUrl":"https://doi.org/10.5593/sgem2022/4.1/s17.18","url":null,"abstract":"Cryogenic energy storage (CES) is a large-scale energy storage technology that stores electricity in the form of liquefied gas at cryogenic temperatures. The CES system has three sub-processes, namely, charging or liquefaction, storage, discharging or power cycle. Because the main energy costs in this system are related to the liquefaction module, we will focus on the analysis of liquefaction processes. The present work aims at performing a comparative study between cycles commonly used for the liquefaction of air to evaluate and compare their performance under given working conditions. The cycles considered are simple Linde cycle, Linde Dual-Pressure cycle, and Claude cycle. The analysis is performed with the software program Engineering Equation Solver (EES). The cycle optimization criterion is the maximum value of the liquefaction coefficient and the minimum value of the specific energy consumption Claude cycle has been chosen as the optimal cycle for use in liquid air storage.","PeriodicalId":331146,"journal":{"name":"SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131280889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}