Erozija žala plaže Ploče (Rijeka)

master's thesis

• Title (english): Beach erosion of the Ploče beach (Rijeka)
• Author: Andrea Tadić
• Mentor: Dalibor Carević (mentor)
• Committee member: Dalibor Carević (predsjednik povjerenstva)
• Committee member: Gordon Gilja (član povjerenstva)
• Committee member: Eva Ocvirk (član povjerenstva)
• Granter: University of Zagreb; Faculty of Civil Engineering; (Water Research); Zagreb
• Defense date and country: 2020-07-09, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Civil Engineering; Hydrotechnology

Abstract

Osnovni problem koji se javlja na šljunčanim plažama svakako je erozija izazvana vjetrovnim valovima. U Hrvatskoj, zahvaljujući turističkoj potražnji, sustavni monitoring obale postaje važan dio upravljanja priobalnim područjima, kako bi održavanje oblika i povećanje kapaciteta plaža bilo opravdano i efikasno. U te svrhe izrađuju se digitalni visinski modeli ispitivanih područja, a kao jeftina, brza i jednostavna metoda za prikupljanje podataka sve više se koristi SfM (eng. Structure from Motion) fotogrametrija. Ova tehnologija omogućuje izradu trodimenzionalnih oblaka točaka promatranoga područja, visoke preciznosti i razine detaljnosti iz niza fotografija. U radu je opisana primjena ovoga postupka na istraživanje problema erozije plaže Ploče u Rijeci. Nakon 7 snimanja terena, odgovarajući oblaci točaka uspoređivali su se u CloudCompare-u. Rezultati pokazuju da je plaža u 50 dana nakon dohranjivanja izgubila cca. 50 m³ materijala kao rezultat valne aktivnosti tijekom i nakon snažnih vjetrova iz smjera juga. Na istočnoj ćeliji plaže gdje je izraženo pomicanje materijala okomito na obalnu liniju izvršena je i usporedba oblika plaže s teoretskim Shingle modelom.

Abstract (english)

The main problem that occurs on gravel beaches is certainly erosion caused by wind waves. In Croatia, due to growing tourist demand, systematic coastal monitoring is becoming an important part of existing coastal management actions, in order to efficiently maintain the shape and improve capacity of beaches. For these purposes, digital elevation models of examined areas are being developed, and SfM (Structure from Motion) photogrammetry is increasingly used, since it is a low-cost, fast and simple method for data collection. This technology allows the creation od three-dimensional point clouds of the observed areas with high precision and resolution, from a series of photographs. This paper describes the application of this procedure to the research of erosion of the Beach Ploče in Rijeka. After 7 terrain surveys, the corresponding point clouds were compared in CloudCompare. The results show that in 50 days after nourishment, the beach lost approximately 50 m³ of material, as a result od wave activity during strong winds from the south. In the eastern cell of the beach, where the movement of material is mainly perpendicular to the shoreline, a comparison of the shape of the beach with the theoretical Shingle model was performed.

• Keywords: erozija šljunčanih plaža; digitalni model terena; SfM fotogrametrija; CloudCompare; Shingle model
• Keywords (english): erosion of gravel beaches; digital terrain model; SfM photogrammetry; CloudCompare; Shingle model
• Language: croatian
• URN:NBN: urn:nbn:hr:237:764056
• Study programme: Title: Civil Engineering; specializations in: Construction Management, Transportation Engineering, Geotechnical Engineering, Hydraulic Engineering, Structural Engineering, Construction Materials, Theory and Modeling of Structures; Course: Construction Management; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka građevinarstva (magistar/magistra inženjer/inženjerka građevinarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-11-24 07:05:30