Abstract
The paper analyzes morphometric features of the slopes of Rab Island. Based on the digital elevation model, raster layers were calculated for the values of slope angle, aspect and curvature, as well as valley network, which was grouped using the Strahler method. A comparative analysis of the calculated values of morphometric parameters was conducted in the GIS environment. Spatial distribution of the values of each of the morphometric parameters was correlated to the structural and morphogenetic features of Rab Island. Differences between the slopes features within each of the morphogenetic types of the terrain were ascertained by comparing their morphometric features, and by using the valley network analysis.
Highlights
The slopes represent terrain planes defined by their spatial position, angle to a horizontal surface, aspect or direction it faces, and the degree of curvature
The application of the digital elevation model in geomorphologic research led to modifications of the methods of the classic morphometric measurements, primarily based on topographic cartographic sources, typical for geomorphologic studies of the past century (Mark, 1975; Evans, 1981; Anderson, Sambles, 1988; Lozić, 2000)
Digital terrain analysis facilitated the development of methods for calculation of parameters such as the values of longitudinal and transversal slope profiles, which are very hard to calculate using only analog cartographic sources
Summary
Hrvatsko vojno učilište "Petar Zrinski" / Croatian Military Academy "Petar Zrinski". U radu su analizirana morfometrijska obilježja padina otoka Raba. U GIS okružju provedena je međusobna analiza izračunatih vrijednosti morfometrijskih parametara. Prostorni raspored vrijednosti pojedinih morfometrijskih parametara doveden je u vezu sa strukturnim i morfogenetskim obilježjima otoka Raba. Utvrđene su razlike obilježja padina unutar pojedinih morfogenetskih tipova reljefa, kako na temelju samih morfometrijskih obilježja, tako i analizom dolinske mreže. The paper analyzes morphometric features of the slopes of Rab Island. A comparative analysis of the calculated values of morphometric parameters was conducted in the GIS environment. Spatial distribution of the values of each of the morphometric parameters was correlated to the structural and morphogenetic features of Rab Island. Differences between the slopes features within each of the morphogenetic types of the terrain were ascertained by comparing their morphometric features, and by using the valley network analysis. Metode prikupljanja kvantitativnih podataka iz spomenutih izvora predstavlja dug proces, s mogućim velikim brojem pogrješaka i naglašenom generalizacijom pri analizi većih prostora
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