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1.
Impact of the Hydroelectric Dam on Aquifer Recharge Processes in the Krško Field and the Vrbina Area : Evidence from Hydrogen and Oxygen Isotopes
Branka Trček, Beno Mesarec, 2023, original scientific article

Abstract: The impact of the damming of the Sava river for the Brežice hydroelectric power plant on the rise of the groundwater level was studied in the intergranular aquifer of the Krško field and the Vrbina area, Slovenia. The study is based on the application of hydrogen and oxygen isotopes (18O, 2H and 3H). Parameters were determined for precipitation, surface water, and groundwater for periods before and after the filling of the accumulation basin, with the aim of evaluating the groundwater–surface water interaction and to elucidate the impact of the hydroelectric dam on aquifer recharge processes. The results show the proportions of the surface water component in groundwater sampled from four wells at high and low water conditions, separately for the period before and after the filling the accumulation basin. After filling the accumulation basin, the proportion of the Sava river component at high water conditions increased from 60% to 80% in the Brege and Drnovo wells (drinking water resources), from 50% to 80% in the Cerklje well and to almost 100% in the near-river NEK well. Combined with previous studies, the results provide important information about the direction of groundwater flow in the aquifer and improve the conceptual model of the study site.
Keywords: stable isotopes, tritium, dam, surface water, groundwater
Published in DKUM: 28.03.2024; Views: 72; Downloads: 2
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2.
Suggestions and solutions for enhancing active commuting to the University of Maribor and advancing ▫$CO_2$▫ emission reduction
Beno Mesarec, Branka Trček, 2024, original scientific article

Abstract: This study investigated commuting behavior at four technical faculties (BCTF) in Maribor. The main aim was to provide suggestions and solutions for challenges related to active commuting to the BCTF, while promoting advancements in CO2 emission reduction. The research methodology was based on analyses of a questionnaire survey and calculations of CO2 emissions. The results indicate that implementing measures to promote walking, bicycling and the use of city and regional public transport, in conjunction with supportive housing and parking policies, has the potential to eliminate car trips within 0–1 km of the BCTF and reduce car trips from other zones in favor of active commuting by 30% to 50%. These proposed transport scenarios could lead to an annual reduction in CO2 emissions ranging from 17% to 29%. The greatest potential for CO2 savings is observed within 0–5 km of the BCTF, where a shift to walking and bicycling could reduce emissions by up to 44%. The results also highlighted a notable disparity, indicating that students with term-time accommodations emitted 3.5 times and 4.1 times less annual CO2 within 0–5 km of the BCTF compared to students and staff commuting daily from their permanent residences in the city.
Keywords: university, travel behavior, modal choice, active mobility, CO2 emissions
Published in DKUM: 30.01.2024; Views: 188; Downloads: 15
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3.
Suggestions and solutions for enhancing active commuting to the University of Maribor and advancing ▫$CO_2$▫ emission reduction
Beno Mesarec, Branka Trček, 2024, original scientific article

Abstract: This study investigated commuting behavior at four technical faculties (BCTF) in Maribor. The main aim was to provide suggestions and solutions for challenges related to active commuting to the BCTF, while promoting advancements in CO2 emission reduction. The research methodology was based on analyses of a questionnaire survey and calculations of CO2 emissions. The results indicate that implementing measures to promote walking, bicycling and the use of city and regional public transport, in conjunction with supportive housing and parking policies, has the potential to eliminate car trips within 0–1 km of the BCTF and reduce car trips from other zones in favor of active commuting by 30% to 50%. These proposed transport scenarios could lead to an annual reduction in CO2 emissions ranging from 17% to 29%. The greatest potential for CO2 savings is observed within 0–5 km of the BCTF, where a shift to walking and bicycling could reduce emissions by up to 44%. The results also highlighted a notable disparity, indicating that students with term-time accommodations emitted 3.5 times and 4.1 times less annual CO2 within 0–5 km of the BCTF compared to students and staff commuting daily from their permanent residences in the city.
Keywords: university, travel behavior, modal choice, active mobility, CO2 emissions
Published in DKUM: 30.01.2024; Views: 120; Downloads: 0

4.
Primerjava metod za izračun hrupa NMPB 1996 in CNOSSOS ob uporabi realnih in modelskih vhodnih podatkov
Tamara Bračko, 2019, master's thesis

Abstract: V magistrskem delu smo proučevali obremenjenost okolice Ceste proletarskih brigad v Mariboru s hrupom cestnega prometa. Izračune hrupa smo opravili po metodah NMPB 1996 in CNOSSOS ob uporabi realnih in modelskih vhodnih podatkov. Pozornost smo namenili postopku pridobivanja vhodnih podatkov, njihovi kakovosti in analizi rezultatov različnih metod. Za različne scenarije smo izračunali zvočno moč cestnega prometa in izdelali karte hrupa. Pridobljeni podatki o površinah raziskovalnega območja, na katerih so kazalci hrupa prekoračeni, so bili osnova za izračun števila stavb in prebivalcev, ki so obremenjenih s hrupom cestnega prometa, in predloge omilitvenih ukrepov. Rezultati so pokazali, da je metoda NMPB 1996 primernejša za uporabo, saj ima metoda CNOSSOS pomanjkljivosti v zvezi s širjenjem hrupa. Z realnimi vhodnimi podatki se bolje opiše stanje okolja kot z modelskimi, vendar je njihovo pridobivanje kompleksnejše, dolgotrajnejše in dražje, zato se njihova raba priporoča v primeru študij na manjših in gosto poseljenih območij z močno obremenjenimi cestami.
Keywords: Maribor, Cesta proletarskih brigad, hrup cestnega prometa, metodi NMPB 1996 in CNOSSOS, realni/modelski vhodni podatki
Published in DKUM: 19.09.2019; Views: 1169; Downloads: 210
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5.
Obremenjenost okolja s hrupom na avtocestnem odseku Cogetinci - Vučja vas
Petra Filipič, 2018, undergraduate thesis

Abstract: Diplomsko delo obravnava temo obremenjenosti okolja s hrupom na izbranem odseku avtoceste Cogetinci−Vučja vas. Da bi kvalitetno zaščitili okolje pred onesnaževanjem, se največkrat izvedejo protihrupni ukrepi, ki se razlikujejo glede na posamezen teren. S pomočjo zbranih podatkov prometnih obremenitev je prikazana rast oz. padec vozil po posameznih kategorijah in letih. Kljub različnim rezultatom je mogoče razbrati enakomerno rast prometa vseh vozil. Po anketi, ki se je izvedla spletno in osebno pri posameznikih, smo ugotovili, da v letih od odprtja avtoceste do danes hrup prebivalcev po večini ne obremenjuje, kakovost življenja pa se zaradi novogradnje ni spremenila ali poslabšala. Dodatni zaščitni ukrepi niso potrebni. Prikazani so tudi podatki o povoženju živali na obravnavanem odseku v preteklih letih. Zabeleženi podatki kažejo, da se je največ povoženj zgodilo na začetku odprtja, kasneje se je številka občutno zmanjšala. Za zmanjšanje števila takšnih vrst nesreč se predlaga gradnja podhodov in uvedba zvočnih in svetlobnih naprav, ki živali odvračajo od prečkanja ceste.
Keywords: okoljski hrup, avtocestni odsek, kakovost življenja, vprašalnik, ukrepi
Published in DKUM: 07.11.2018; Views: 1017; Downloads: 89
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6.
Analiza vpliva življenjskega cikla proizvodnje aluminijevih drogov na okolje
Anja Selinšek, 2018, master's thesis

Abstract: V magistrskem delu smo s pomočjo delovnega okolja družbe Talum iz Kidričevega na konkretnem primeru proizvodnje aluminijevih drogov prikazali uporabo metode analize življenjskega cikla. V teoretičnem delu magistrskega dela je predstavljen razvoj metode in njen podrobnejši opis s pomočjo standardne osnove. Skozi razčlenjen proizvodni proces smo opisali vsak korak proizvodnje posebej ter hkrati razložili njegove bistvene značilnosti. V raziskovalnem delu magistrskega dela smo na podlagi veljavnih standardov zbrali in analizirali informacije o vhodnih in izhodnih tokovih posamezne procesne enote. Dobljene informacije smo zajeli v programu GaBi Education ter tako številčno ovrednotili izbrane kazalnike obremenjevanja okolja. V sklepnem delu magistrskega dela je sledil še poskus okoljskega optimiziranja z modeliranjem različnih scenarijev transportnih poti uvoza osnovne surovine – glinice.
Keywords: metoda analize življenjskega cikla, trajnostnost, proizvodnja aluminijevih drogov, vplivi na okolje, kazalniki okoljskega vpliva
Published in DKUM: 22.02.2018; Views: 1699; Downloads: 46
.pdf Full text (1,61 MB)

7.
Risk assessment of mineral groundwater near Rogaška Slatina
Branka Trček, Albrecht Leis, 2017, published scientific conference contribution

Keywords: groundwater, thermo-mineral waters, environmental protection
Published in DKUM: 02.02.2018; Views: 1287; Downloads: 368
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8.
Ravnanje z odsluženim fotonapetostnim sistemom
Martin Špes, 2017, master's thesis

Abstract: Fotonapetostni sistemi s pomočjo svojih komponent pretvarjajo svetlobno energijo v električno. Njihovo število se iz leta v leto povečuje, posledično tudi zaradi tega, ker koristijo energijo iz obnovljivih virov. Zaradi specifike fotonapetostnega modula nastopijo težave, ko ta konča kot odpadek, saj so njegovi postopki recikliranja precej dragi in zahtevni. V magistrskem delu je predstavljen celoten fotonapetostni sistem, njegove komponente in njegove možnosti recikliranja. Analizirano je stanje slovenskega fotonapetostnega trga in stanje na področju slovenske zakonodaje, ki zajema odpadne fotonapetostne module. Na podlagi analize o stanju slovenskega fotonapetostnega trga je podana ocena o količinah odpadnih fotonapetostnih modulov, ki jih lahko pričakujemo v naslednjih letih. Da bi odsluženim fotonapetostnim modulom povečali dodano vrednost, smo predstavili idejo, da fotonapetostne module povežemo s krožnim gospodarstvom.
Keywords: fotovoltaika, fotonapetostni sistem, zakonodaja, recikliranje, krožno gospodarstvo
Published in DKUM: 16.01.2018; Views: 1300; Downloads: 137
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9.
Risk assesment of an urban aquifer based on environmental tracers
Branka Trček, Primož Auersperger, Albrecht Leis, Jürgen Sültenfuss, 2013, original scientific article

Abstract: Groundwater from a Pleistocene sandy-gravel aquifer is a drinking water resource for the Union brewery, located near the centre of Ljubljana (Slovenia). A large part of the aquifer recharge area is highly urbanized, which represents a great risk for the groundwater quality assurance. The groundwater dating techniques were used to study the contamination risk of this drinking-water resource. The application of chlorofluorocarbons (CFCs), sulphur hexafluoride (SF6) and tritium-helium-3 (3H-3He) age indicator was tested, as they haven’t been used in Slovene urban areas so far. The results reflect that the 3H-3He dating technique is the most suitable for a groundwater age determination in the study urban aquifer, since SF6 and particularly CFCs concentrations could be affected by the local contaminations. They indicated that average groundwater residence times range from 10 to 30 years. Boreholes that are more distant from the Šišenski hrib hill are more vulnerable to contamination due to flow of young groundwater from a direction of the main aquifer, which is exposed to the urban pollution. The presented results were supplemented with chemical investigations of groundwater organic pollutants. An unknown trace organic pollutant with a base ion mass-to-charge ratio 147 was put into focus. Its identification based on chromatographic separation and a mass spectrometric detection with GC-MS, LC-MS and LC-TOF MS techniques. The newly detected trace organic pollutant in sampled groundwater represents together with the 3H and 3He data a new technique to study the flow paths and contaminant transport in the urban aquifer in both, the lateral and vertical directions.
Keywords: urban area, intergranular aquifer, contamination risk, environmental tracers
Published in DKUM: 24.07.2017; Views: 1118; Downloads: 411
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10.
MIRUJOČI PROMET V MARIBORSKI SOSESKI NOVA VAS 2
Melisa Mekiš, 2016, undergraduate thesis

Abstract: Diplomsko delo temelji na spremljanju mirujočega prometa v stanovanjskem delu soseske Nova vas 2 v Mariboru, kjer so javne površine čez leta postala divja parkirišča. Predpostavili smo, da uradne parkirne površine v soseski zadoščajo za urejanje mirujočega prometa, kar smo dokazali na podlagi terenskega kartiranja parkirnih površin ter prehodnosti in povezljivosti soseske, spremljanja zasedenosti parkirišč med delavnikom in vikendom ter analiz podatkov o številu prebivalcev, stanovanj in registriranih vozil. Rezultati so podali smernice za urejanje mirujočega prometa stanovanjske soseske po sonaravnih normativih.
Keywords: mirujoči promet, divja parkirišča, Maribor, soseska Nova vas 2, sonaravna ureditev
Published in DKUM: 28.09.2016; Views: 1478; Downloads: 174
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