Varijabilnost morfologije i volumena žala Dugi Rat temeljena na SfM fotogrametriji

master's thesis

• Title (english): Morphology and volume variability of Dugi Rat beach based on SfM photogrammetry
• Author: Tina Tominić
• Mentor: Mladen Juračić (mentor)
• Committee member: Mladen Juračić (predsjednik povjerenstva)
• Committee member: Borna Lužar-Oberiter (član povjerenstva)
• Committee member: Marijan Kovačić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Geology); Zagreb
• Defense date and country: 2017-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Geology

Abstract

Hrvatska obala je podložna intenzivnim promjenama uzrokovanim prihranjivanjem prirodnih ili gradnjom umjetnih žala, prvenstveno u turističke svrhe. Žalo Dugi Rat jedan je primjer umjetnog žala na kojem se radi kontinuirane erozije odvija redovito prihranjivanje. Metoda SfM fotogrametrija upotrijebljena je za izradu digitalnih elevacijskih modela (DEM-ova) radi utvrđivanja morfoloških promjena i promjena volumena sedimenta na žalu tijekom dvogodišnjeg perioda. Granulometrijskom metodom analizirane su veličina i oblik zrna na 7 reprezentativnih uzoraka sakupljenih iznad intertajdala duž žala. Rezultati su pokazali da je srednja veličina zrna manja od veličine zrna sedimenta prirodnih žala u okolici. DEM-ovi razlike pokazuju da je nasipani materijal na žalu neprikladan s obzirom na veličinu zrna, a glavni čimbenik koji utječe na promjene volumena sedimenta i morfologije žala su valovi juga. SfM metoda pokazala se upotrebljivom za praćenje kratkotrajnih promjena na malim žalima kakvim obiluje hrvatska obala, kao i činjenicu da je potrebno razviti strategiju održivog upravljanja žalima, unutar upravljanja obalnom zonom.

Abstract (english)

Croatian coast is affected by intensive changes caused by replenishment of natural beaches or the tendency to build artificial ones, primarily for tourism purposes. One example of a replenished artificial beach where continuous erosion is regulary present is Dugi Rat beach. SfM photogrammetry was applied to generate digital elevation models in order to determine the morphologic changes and sediment volume on the beach during a two-year period. In order to determine suitability of the sediment used for replenishment, grain size and shape were analysed on seven representative samples collected in the intertidal along the beach. Results show that the median diametar of sediment grains is less than the median of the adjacent natural beaches. According to DEMs of difference it can be concluded that the replenished material on the beach is not suitable with regards to grain size, while volume change and beach morphology are mostly caused by Sirocco waves. The SfM method has shown that it can be successfully applied for frequent beach surveys on the small beaches which dominate on the Croatian coast, as well as demonstrated the fact that it is necessary to develop a strategy for sustainable beach management within the coastal zone management.

• Keywords: digitalni elevacijski model; granulometrijska analiza; SfM fotogrametrija; žalo
• Keywords (english): beach; digital elevation model; granulometric analysis; SfM photogrammetry
• Language: croatian
• URN:NBN: urn:nbn:hr:217:349398
• Study programme: Title: Graduate university study of Environmental Geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra geologije (magistar/magistra geologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-05-04 08:26:25