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Models of geomorphometric parameters and drainage networks are widely used in many scientific and civilian branches and activities. They are created using the Earth’s land surface data, which are today mostly represented by digital elevation models (DEMs). The main objective of this study is to create models of slope, aspect, and drainage networks for the first time for the entire continental part of the Republic of Croatia, using the most detailed DEMs. In this paper, developed models are described, compared, and analysed, giving insights into morphological characteristics and structures of topographic surface. The quality of the derived models has been validated using existing independent data. Furthermore, because models were derived using various global DEMs, the differences between output models have been addressed and studied. Drainage network models were further analysed depending on several available computation algorithms (single and multiple flow direction) and threshold values. The analysis of the sensitivity and influence of input parameters and models on output models has been assessed in order to create reliable drainage network models for the future for other local or regional areas. Modeli geomorfometrijskih parametara i drenažne mreže imaju siroku primjenu u mnogim znanstvenim i civilnim granama i aktivnostima. Izrađuju se iz podataka o Zemljinoj povrsini koji su najcesce objavljeni u obliku digitalnih modela reljefa (DMR). Glavni je cilj ovoga rada izraditi modele nagiba, smjera nagiba i drenažnih mreža za kontinentalno podrucje Republike Hrvatske koristenjem najdetaljnijega globalnog digitalnog modela reljefa. Izrađeni modeli su opisani, uspoređeni i analizirani te daju uvid u morfoloske oblike i strukture topografske povrsine. Kvaliteta modela provjerena je na postojecim neovisnim podacima. Osim toga, s obzirom na to da su modeli izrađeni koristenjem razlicitih globalnih digitalnih modela reljefa, analizirane su razlike između izlaznih modela. Modeli drenažne mreže dodatno su analizirani ovisno o koristenim algoritmima (jednosmjerni i visesmjerni protok) i granicnim vrijednostima. Analiza osjetljivosti i utjecaja ulaznih parametara i modela na izrađene modele bit ce korisna za izradu pouzdanijih buducih modela drenažnih mreža za druga lokalna i regionalna podrucja.

Models of geomorphometric parameters and drainage networks for the territory of Republic of Croatia