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Упит dcterms_subject_txt:groundwater lowering

92 items

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... the horsehead. The driving unit, known as the horsehead, is used to operate the plunger of the deep well pump. It facilitates the lifting and lowering of the smooth rod and sucker rods, as well as the pump plunger. The horsehead is characterized by its maximum allowable torque, load capacity ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)

    Kostadin J. Jovanov (2016-06-24)
    Leţišta uglja „Suvodol“, „Brod-Gneotino“ su u eksploataciji, a leţište uglja „Ţivojno“je u fazi pripremi. Nalaze se u krajnjem jugoistočnom i juţnom delu Pelagonijskekotline. Sva tri leţišta stvorena su u neogenim sedimentima u jezerskim uslovimasedimentacije u zoni kontakta sa prekambrijumskim kristalastim stenama. Kod sva trileţišta ugalja se javljaju više slojeva različite debljine, u okviru kojih se nalaze klastičnisedimenti (gline, peskovi i dr.). U podini ugljenog basena nalaze se kristalaste steneprekambrijumske starosti.Teren u okolini leţišta uglja karakteriše se umereno kontinentalnom klimom, ...
    ugalj, podzemne vode, površinske vode, neogeni kompleks, izdani,transmisibilnost, nivo podzemne vode, sniţenje nivoa
    ... surrounding water areas). Key words: coal, ground water, surface water, Neogene complex, aquifers, transmissibility, level of ground waters, lowering levels, ect. Specifik discipline: Geological Engineering Particular area of study: Hydrogeology UDK: 622.33.556.3 (497.17))(043.3) ...
    ... is on behalf of the precipitation and ground water that flows fromeast and south-east. In the substratum aquifer the recharge is on behalf of groundwater that comes from west, south and south- east. Measuring of air quality is necessary so that the environment could be protected; the level of ...
    ... matematički model za jednoslojnu sredinu u uslovima strujanje podzemnih voda pod pritisakom i u uslovima sa slobodnim nivoom, primenom softvera Groundwater Vistas, verzija 4. Hidrodinamičkom modelu napravljena je simulacija odvodnjavanja izdani nakon 12 i 24 meseci rada sistema bunara (slika 5.57 ...

  • Multiple-Criteria Decision-Making in Mine Development Planning

    Sanja Bajić (2023)
    The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... years of experience in groundwater monitoring, as well as in defining: the genesis, origin and mechanisms of groundwater recharge; groundwater mean residence . time and groundwater age; interconnections between surface and groundwater and mixture of water from different aquifers using isotopic ...
    ... interval of several hours or days. Groundwater dye tracing test One of the important methods in the karst groundwater research and groundwater direction movement and speed, and therefore the development of the karst aquifer, is dye tracing tests of groundwater flow. The most common dye tracer used ...
    ... protection of karst groundwater; the functioning and influence of the epikarst on the karst aquifer; organization of groundwater monitoring network and creation of groundwater databases; environmental impact assessments; sustainable and ecologically safe use of (karst) groundwater; speleological research; ...

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... THE GROUNDWATER OF SERBIA ABSTRACT The primary objective of this PhD thesis was to determine background concentrations of natural radionuclides (U, Th, and K) in the groundwater, and to establish hydrogeochemical conditions affecting the distribution of these elements in groundwater. The ...
    ... ER. 2004. Groundwater vulnerability to nitrate contamination in the Mid-Atlantic region. USGS, Baltimore. 52. Griffioen J, Kruseman JP. 2004. Determining hydrodynamic and contaminant transfer parameters of groundwater flow. In: Kovalevsky VS, Kruseman GP, Rushton KR (eds.). Groundwater Studies ...
    ... 157. Toth J, Hayashi M. 2010. The theory of basinal flow of groundwater and its impacts on hydrology in Japan: (Tokyo) Journal of Groundwater Hydrogeology 52: 335 – 354. 158. Tóth J. 1963. A theoretical analysis of groundwater flow in small drainage basins. J. Geophys. Res. 68(16): 4795 – ...

  • Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака

    Зоран Гојковић (2023)
    Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...
    Сентинел 1 интерферометрија, слегање, Перманентни скатерери, Костолац

  • Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije

    Jelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar (2023)
    Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...
    mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacija

  • Hronološki pregled razvoja površinske eksploatacije lignita u Srbiji

    Bojan Dimitrijević, Radmila Gaćina, Bogoljub Vučković (2023)
    U ovom preglednom radu dat je istorijski pregled razvoja površinske eksploatacije lignita na teritoriji Srbije, uz kratak osvrt na geološki nastanak i kvalitet i rezerve uglja, kao i mogućnosti korišćenja za dalju upotrebu. Kolubarski, Kostolački i Kovinski ugljeni baseni lignita u Srbiji, ne računajući Kosovsko-Metohijski i Drenički u sastavu AP Kosovo i Metohija po Rezoluciji 1244 UN, su ležišta najrasprostranjenijeg uglja - lignita u Srbiji koji se eksploatiše od druge polovine 20. veka na velikom broju površinskih kopova ...
    površinska eksploatacija ugalja, lignit, Kolubara, Kostolac, Srbija

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... constantly improved during 2007-2014 (SEPA, 2016). During the operational monitoring of groundwater in the Republic of Serbia 2017, a nitrate concentration above MAC level of 50 mg/I was registered only in one groundwater source located in alluvion of the Crni Timok River (MEP, 2018). The designation ...
    ... pesticide was also found in seven groundwater samples in the concentration range 3—11 ng L !. Propazine was found in Complimentary Contributor Copy FEmerging Pollutants in Serbia 239 one surface water sample (8 ng L !). Carbofuran was detected only in groundwater samples at concentrations 7—10 ...
    ... and/or groundwater samples were found drugs trimethoprim, sulfamethoxazole, lorazepam, azithromycin and metamizole”s metabolites: 4-formylaminoantipyrine (4-FAA) and 4-acetylaminoantipyrine (4-AAA). The pharmaceutical carbamazepine was found in both, sediment and surface or groundwater samples ...