20.500.12556/RUL-68438 Modeliranje hidrodinamike in transporta živega srebra v Velenjskem jezeru Modelling of hydrodynamics and mecury transport in lake Velenje Tridimenzionalni matematični model PCFLOW3D, razvit na katedri za mehaniko tekočin Fakultete za gradbeništvo in geodezijo, smo uporabili za simulacije hidrodinamike in transporta živega srebra v Velenjskem jezeru. Popolnoma nelinearen hidrodinamični modul daje kot rezultat tri komponente hitrosti, potek gladine vode in tlake. S transportno-disperzijskima enačbama izračunamo prostorsko porazdelitev slanosti in temperature (in/ali poljubnega polutanta). Iz rezultatov simulacij je razvidno, da so glavni vir živega srebra v Velenjskem jezeru vtoki. Hidrodinamične simulacije so pokazale, da vtoki in iztoki površinskih in podzemnih voda nimajo velikega vpliva na cirkulacijo vode v jezeru. Glavni vzrok za gibanje vode sta veter in temperatura vode in okolice. Simulacije transporta živega srebra z modelom PCFLOW3D se dobro ujemajo z merjenimi koncentracijami različnih oblik Hg in metil-Hg v Velenjskem jezeru. Izračunane tokove vode smo preverili s primerjavo z meritvami izotopov δ18O in δ2H ter meritvami različnih oblik Živega srebra in metil živega srebra. Porazdelitev posameznih zvrsti in oblik živega srebra ter izotopska sestava v vodnem okolju Velenjskega jezera je opisana v prvem delu članka. PCFLOW3D - a three-dimensional mathematical model that was developed at the Chair of Fluid Mechanics of the Faculty of Civil and Geodetic Engineering, University of Ljubljana, was used for hydrodynamic and Hg transport simulations in Lake Velenje. The model is fully non-linear and computes three velocity components, water elevation and pressure. Transport-dispersion equations for salinity and heat (and/or any pollutant) are further used to compute the distributions of these parameters. The results show that the major sources of mercury in Lake Velenje are lake inflows. The hydrodynamic simulations revealed that ground and/or surface water inflow and outflow do not have much influence on water cycling in the lake basin. Wind and ambient temperature seem to have the greatest influence on water movement in the lake. Mercury transport simulations performed by PCFLOW3D show good agreement with the measured distribution of different Hg and MeHg forms in Lake Velenje. Verification of water flow was done by isotope tracers δ18O and δ2H and measurements of different Hg and MeHg forms. Distribution of different Hg species and forms and isotopic composition in water of Lake Velenje is described in Part 1. hidrodinamika sedimenti živo srebro prenos snovi modeliranje Velenjsko jezero true false false Univerza v Ljubljani, Fakulteta za gradbeništvo in geodezijo Slovenski jezik Angleški jezik Neznano 2015-07-10 21:04:19 2015-07-10 21:04:19 2022-11-22 10:25:27 0000-00-00 00:00:00 2004 0 0 Str. 77-93 [št.] 37 22 2004 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 0352-3551 504:546.49(497.4Velenje) 232254976 3664386 AH2004Kotnik37.pdf AH2004Kotnik37.pdf 1 F28B0AF2C56298FFA0934B75F95DEEC1 0d1c8bf688d231e4e36c29307cceb5756b608c59d215479f69e78e40f8b42485 1444dc05-a1ae-11eb-a523-00155dcfd717 20.500.12556/rul/9394a859-dbe3-40db-badf-2ce7d4ef024a https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=85700 Fakulteta za gradbeništvo in geodezijo 0 0 0