Primerjava modelov širjenja nafte v morju po metodah trajektorij in sledenja delcev

• Main Author: Ostanek Jurina, Tadej
• Other Authors: Žagar, Dušan
• Format: Bachelor Thesis
• Language: Slovenian
• Published: T. Ostanek Jurina 2015
• Subjects: gradbeništvo; diplomska naloga; UNI; VOI; razlitje nafte; model NAFTA3d; metoda sledenja delcev; metoda trajektorij; Tržaški zaliv; Severni Jadran; graduation thesis; civil engineering; oil spill; NAFTA3d model; particle tracking method; trajectory method; Gulf of Trieste; Northern Adriatic; info:eu-repo/classification/udc/504:532.5:551.35:665.61(043.2); Zaliv; sami
• Online Access: https://repozitorij.uni-lj.si/IzpisGradiva.php?id=72120; https://repozitorij.uni-lj.si/Dokument.php?id=86171&dn=; https://repozitorij.uni-lj.si/Dokument.php?id=72151&dn=; https://plus.si.cobiss.net/opac7/bib/7131489?lang=sl

Razlitij nafte v morskem okolju ni mogoče povsem preprečiti, zato skušamo zmanjševati njihove posledice. V ta namen se razvijajo modeli širjenja in razgradnje nafte. Model NAFTA3d, deluje na osnovi metode sledenja delcev, njegov rezultat pa so koncentracije nafte ob izbranih časih. Modelu je bil dodan modul delujoč po metodi trajektorij, s katerim je prikazana verjetnost pojava naftnega madeža. V prvem delu naloge prikažemo teoretično ozadje matematičnega modeliranja širjenja nafte v morju ter opišemo potek in zahteve odziva na razlitje. Prikažemo tudi možen nadaljnji razvoj metode trajektorij. V drugem delu opišemo obe metodi in delovanje uporabljenega modela. Predstavimo izdelan program za avtomatizacijo grafičnega izpisa. V tretjem primerjamo rezultate izračuna koncentracij in metode trajektorij z več simulacijami v Tržaškem zalivu in Severnem Jadranu ter analiziramo uporabnost simulacij s trajektorijami. Prikažemo prednosti in slabosti metode trajektorij. Raziskava kaže, da je novi modul najbolj primeren za odziv na razlitje pri taktičnem načinu modeliranja, njegovi največji prednosti pa sta velika hitrost izračuna ter enostaven in učinkovit prikaz celotnega ogroženega območja na eni sami karti. V zaključku predlagamo način praktične uporabe simulacij po metodi trajektorij. Oil spills in the marine environment cannot be prevented entirely. In order to diminish their consequences, numerous oil spreading and weathering models have been developed. The NAFTA3d model is based on the particle tracking method, its results are oil concentrations at specified times. A new module based on the trajectory method showing the probability of oil slick occurrence was added to the model. The thesis first describes theoretical background of mathematical oil spill modelling in the marine environment as wall as the course and demands of an oil spill response. We show possible further development of the trajectory method. The second part describes both methods and functioning of the model. A graphic printout automation program developed in the scope of the thesis is presented. In the third part we present the results of performed simulations and analyse the suitability of the trajectory method by comparing concentrations and trajectories in the Gulf of Trieste and in the Northern Adriatic. We depict the strengths and weaknesses of the trajectory method. The study reveals that the new module is most suitable for oil spill response modelling, its major advantages being high computational speed as well as simple and efficient presentation of the entire area at risk on a single map. Finally, we propose a procedure for practical use of the trajectory method.