20.500.12556/RUL-182777 VPLIV MANEVRIRANJA Z LADJAMI NA RESUSPENZIJO SEDIMENTA Impact of Ship Manoeuvres on Sediment Resuspension Globalni trend prevoza tovora po morju stremi k ladjam z vedno večjo kapaciteto, kar pomeni večji ugrez in večjo potisno silo glavnega propulzijskega sistema ladje. Zaradi slednjega so pristanišča primorana sprejemati ladje z majhno podkobilično razdaljo (UKC). Pristanišča se soočajo s poglabljanjem pristopnih kanalov in samih pristanišč, da bi lahko sprejemala ladje z večjim ugrezom ter ostala konkurenčna na svetovnem pomorskem trgu. Majhna podkobilična razdalja ladje skupaj z asistiranjem vlačilcev privede do resuspenzije sedimentov z morskega dna; negativne posledice se kažejo v morski favni in flori, eroziji sedimenta okoli podpornih pilotov pristaniške infrastrukture ter odlaganjem lebdečega sedimenta na določena področja v pristopnih kanalih ali bazenih. Slednje je tudi S to problematiko se srečuje tudi Luka Koper. Doktorska disertacija podaja metode za oceno vpliva manevriranj z ladjami na resuspenzijo sedimenta. Podana je metoda integracije navtičnega simulatorja v realnem času, ter obdelava dinamičnih in statičnih podatkov propulzijskih sistemov udeleženih v samem manevru, na podlagi uveljavljenih empiričnih in semi-empiričnih enačb (PIANC, Maynordov model, nemški in nizozemski pristop), ki so podale izhodne hitrosti tokovnic iz propulzijskih sistemov v nestacionarnem stanju. Rezultati so bili implementirani v tridimenzionalni hidrodinamični in transportni model sedimenta (MIKE 3 FM/MT) z ustvarjeno batimetrijo obravnavanega področja morskega dna, ki omogoča kvantitativno analizo resuspenzije sedimenta v pogojih nestacionarnega manevriranja, s prikazom hitrosti, smeri tokovnic, vertikalnega profila specifične koncentracije sedimenta, spremembami globine morskega dna, gostoto navtičnega dna in depozicije sedimenta in strižne napetosti na morskem dnu, ki so posledica propulzijskih sistemov. Simulacijski scenariji so analizirani in validirani na podlagi realnih manevrov primerljivih kontejnerskih ladij, vključno z asistenco vlačilcev. Izvedena je bila eksperimentalna verifikacija vzorčenja v vodnem stolpcu in satelitske slike. Vzorčenje v vodnem stolpcu se je izvedlo na podlagi treh manevrov s šestimi meritvami na treh globinah s pomočjo Niskin vzorčevalnika. Prve meritve so bile izvedene pred začetkom manevra in so podale povprečje 9 mg/l v vodnem stolpcu, šesta meritev pa po zaključku manevrov 27 mg/l v vodnem stolpcu, kar nakazuje na trikratno povečanje količine sedimenta. Podane so smernice, ki bi skozi daljše časovno obdobje zmanjšale količino resuspendiranega sedimenta. The global trend in maritime cargo transport is moving toward ships with deadweight capacity, which to a certain extent implies greater draft and higher thrust produced by the ship’s main propulsion system. As a result, ports are required to accept vessels with low under-keel clearance (UKC). To remain competitive in the global maritime market, ports are facing the need to deepen access channels and harbour basins with dredging operations in order to accept ships with larger drafts. A small under-keel clearance, combined with the assistance of tugboats, leads to the resuspension of sediments from the seabed. This has negative effects on marine fauna and flora, causes erosion of sediment around the supporting piles of port infrastructure, and results in the deposition of suspended sediment in certain areas of approach channels or basins. The Port of Koper also faces this issue. This doctoral dissertation presents methods for assessing the impact of ship manoeuvring on sediment resuspension. It introduces a method that integrates a real-time nautical simulator with the processing of dynamic and static data from propulsion systems involved in the manoeuvre, based on established empirical and semi-empirical equations (PIANC, Maynord model, German and Dutch approaches). These provide output velocities of currents from the propulsion systems in the unsteady state. The results were implemented in a three-dimensional hydrodynamic and sediment transport model (MIKE 3 FM/MT) with generated bathymetry of the studied seabed area, enabling quantitative analysis of sediment resuspension under unsteady manoeuvring conditions. This includes displaying current speed and direction, vertical profiles of specific sediment concentration, changes in seabed depth, seabed density, sediment deposition, and shear stress on the seabed caused by propulsion systems. Simulation scenarios were analysed and validated using real manoeuvres of comparable container ships, including tug assistance. Experimental verification involved water column sampling and satellite imagery. Water column sampling was conducted during three manoeuvres, with six measurements at three depths using a Niskin sampler. The initial measurements, taken before the manoeuvre, showed an average of 9 mg/l in the water column, while the final measurement after the manoeuvres was 27 mg/l, indicating a threefold increase in sediment concentration. Guidelines are provided to reduce the amount of resuspended sediment over an extended period. manever pristajanja/izplutja kontejnerska ladja resuspenzija sedimenta ukrepi za zmanjšanje resuspenzije sedimenta tokovno polje iz strani propulzijskih sistemov hidrodinamični program MIKE 3 FM in MT landing/departure manoeuvre container ship sediment resuspension measures to reduce sediment resuspension flow field from propulsion systems hydrodynamic programme MIKE 3 FM and MT true false false Slovenski jezik Angleški jezik Doktorsko delo/naloga 2026-05-22 14:00:25 2026-05-22 14:00:43 2026-05-26 12:07:55 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 44537 278946307 17275.pdf 17275.pdf 1 8F7FB57E8A6CCAB08F20217C225C982D d7988e6f16f8bd0b8ccc78991c464ecbb62ddcffc3464301a4ea965b5ab7ce0f 8ba982b3-55d5-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=234314 Fakulteta za pomorstvo in promet 0 0 0