Procjena rizika od obalne erozije u Liberiji

master's thesis

• Title: Procjena rizika od obalne erozije u Liberiji : diplomski rad
• Title (english): Coastal erosion risk assessment in Liberia : master's thesis
• Author: Bruno Oršanić
• Mentor: Snježana Mihalić Arbanas (mentor)
• Mentor: Sanja Bernat Gazibara (komentor)
• Committee member: Snježana Mihalić Arbanas (predsjednik povjerenstva)
• Committee member: Martin Krkač (član povjerenstva)
• Committee member: Željko Arbanas (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Geology and Geological Engineering); Zagreb
• Defense date and country: 2020-07-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Geological Engineering

Abstract

Cilj istraživanja provesti prostornu analizu procjene rizika od obalne erozije za državu Liberiju
u mjerilu 1:1.500.000 na temelju svih dosadašnjih istraživanja i dostupnih podataka u državnim
i ostalim internacionalnim arhivama. Analizirano je pet glavnih preduvjeta za eroziju: godišnja
stopa erozije i akrecije, inundacija morske vode, gustoća naseljenosti, kulturna baština te
pokrov i namjena zemljišta. Metoda primijenjena u istraživanju je korištena ranije u istraživanju
Trumbić (2018) za procjenu ranjivosti obale u Orrishi (Indija). Metodologija se bazira na
heurističkim procjenama koje se oslanjaju na iskustveno znanje stručnjaka koji definira
faktorske karte, klase i težinske vrijednosti pojedinih klasa faktorskih karata koje će se koristiti
pri procjeni. Tako pripremljene karte težinskih faktora zbrojene su i označavaju područja
podijeljena prema stupnjevima relativnog rizika. Izvedeno je ukupno sedam klasifikacija od
kojih je pet automatski generirano iz programa ArcGIS, dok su dvije provedene s obzirom na
iskustvenu procjenu stručnjaka. Pokazalo se da iskustvena metoda Klasifikacije 2 daje
najoptimalnije rezultate te je 53,40% istraživanog područja klasificirano kao područje relativno
niskog rizika, 31,78% kao područje relativno srednjeg rizika, 9,83% kao područje relativno
visokog rizika te 4,99% kao područje relativno vrlo visokog rizika. S obzirom na trenutno
stanje, nužno je poduzeti mjere prevencije od obalne erozije počevši na sjeverozapadnom dijele
Liberije gdje je obala izloženija procesu obalne erozije.

Abstract (english)

The goal of the research was to make an erosion risk assesment map for the coast of Liberia in
regional scale of 1:1.500.000 based on all conducted research on similar topics and available
data in the state or other international archives. Five main erosion factors were analysed: yearly
rate of erosion and accretion , sea water inundation, population density, cultural heritage and
land use land cover data. The method used in this thesis was used in the research conducted by
Ivica Trumbić regarding land vulnerability mapping for the state od Orrisha in India in the year
2018. Methodology is based on heuristic assesments which rely on experiential knowledge of
the expert who decides which factors have to be factored into the analysis. These factors are
then processed and later on added up showing the areas divided according to the degrees of
relative risk. The factors went through 7 different classification types. Five of those were
generated by the software ArcGIS while the other two were manually specified by according to
the researchers’ experiential assessment. Analysis showed that the experiential classification
Klasifikacija 2 is the most accurate. It showed that 53,40% of the researched area is classified
as the area with low degree of relative risk, 31,78% as the area with medium degree of relative
risk, 9,83% as area with high degree of relative risk and 4,99% as area with very high degree
of relative risk. With regards to the current conditions, it is necessary to take coastal erosion
prevention measures starting with northwest part of Liberia where the coast is exposed to the
coastal erosion process the most.

• Keywords: erozija; ranjivost; hazard; faktor; rizik; klasifikacija; Liberija
• Keywords (english): erosion; vulnerability; hazard; factor; risk; classification; Liberia
• Language: croatian
• URN:NBN: urn:nbn:hr:169:467206
• Study programme: Title: Geological engineering; specializations in: Hydrogeology and engineering geology, Environmental geology; Course: Hydrogeology and engineering geology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka geološkog inženjerstva (magistar/magistra inženjer/inženjerka geološkog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-07-22 12:46:17