20.500.12556/RUL-108235 Vpliv sončnega sevanja na odmiranje Escherichie coli v morskem okolju diplomska naloga The influence of solar irradiance on the decay of Escherichia coli in the marine environment graduation thesis Escerichia coli je palicasta bakterija, ki obicajno biva v prebavnem traktu toplokrvnih organizmov. Zaradi njene prepoznavnosti jo uporabljajo kot enega potencialnih indikatorjev onesnažene vode. V diplomskem delu smo koeficient K modelirali z nestacionarnim osoncenjem prek obdobja enega dneva (poletni in zimski soncen dan ter poletni oblacen dan). Program je napisan v programskem okolju Matlab, kamor smo uvozili podatke o slanosti, temperaturi, soncnem sevanju, globini premešanega sloja in koeficientu motnosti vode. Ustvarili smo štiridimenzionalno matriko, ki vsebuje koeficiente odmiranja v odvisnosti od casa, globine in lokacije bakterije v horizontalni ravnini. Generirane podatke smo primerjali z rezultati magistrskega dela (Lešek, 2018). Ugotovili smo, da odstopanje z globino narašca in se giblje med 3 in 20 % pri povprecnih vrednostih koeficientov po slojih, kar pomeni, da stacionarno soncno sevanje poda prevec optimisticno napoved odmiranja E. coli. Escherichia coli are rodent bacteria that are usually found in the gastrointestinal tract of warmblooded organisms. Because of its recognizability, it is used as one of the potential indicators of contaminated water. We modeled the coefficient K by non-stationary solar radiation over a period of one day for three different types of weather using a summer and a winter sunny day and a summer cloudy day. The modeling was performed in Matlab environment, where we considered data on salinity, temperature, solar radiation, depth and the coefficient of water turbidity. As a result, we created a four-dimensional matrix containing coefficient K, which depends on the time, mixed layer depth and location of the bacteria in the horizontal plane. Furthermore, we compared the obtained results with the results of another master’s thesis (Lešek, 2018). The difference between the coefficient K within individual layers increases with depth reaching the discrepancies between 3 and 20 %. Therefore, applying daily averaged solar radiation gives a too optimistic prediction of the E. coli decay rate. modeliranje Escherichia coli razpadna enacba prvega reda Mancinijeva enacba nestacionarni koeficienti modeling Escherichia coli first-order reaction Mancini’s equation non-stationary coefficient true true false [C. Leonardi] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2019-06-22 07:15:25 2019-06-22 07:15:29 2022-08-20 03:45:15 0000-00-00 00:00:00 2019 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.5:582.23(078.9)(043.2) 134990 8843617 2919.pdf 2919.pdf 1 92E0971C0A3140E8F0C51FF051CA26F7 f3e6c4b27147792171b12f1bfe5b387d7c649d390c61ecf6e452d283535d2d6f 99b2256f-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=119180 Fakulteta za gradbeništvo in geodezijo 0 0 0