The Upper Part of the Una River Valley Between Martin Brod and Pritoka - Geomorphological Characteristics

Abstract

The Una River Valley has complex characteristics defined by the interchange of gorges, basins and valley extensions. The river has adapted itself to the primary geologic structure and to the activity of tectonic movements. The longitudinal profile of the river is the result of numerous rapids, cascades and waterfalls, the formation of which is connected with calcareous sinter accumulation. Morphogenetic analysis has shown that a series of very attractive and strange relief forms is being formed in the riverbed of the River Una such as calcareous sinter barriers, sinter riverbeds, calcareous sinter islands and caves.Key Words: Una River, calcareous sinter, riverbed, micro-landforms Geomorfološke karakteristike gornjeg dijela doline Une između Martin Broda i PritokeKompleksnost doline rijeke Une očituje se u izmjeni sutjeski, zavala i kotlina. Rijeka se prilagodila primarnoj geološkoj strukturi i tektonskoj aktivnosti. Uzdužni profil rijeke rezultat je brojnih brzaca, kaskada i vodopada, čije je oblikovanje povezano s taloženjem sedre. Mofrogenetska analiza je pokazala da se u koritu rijeke Une stvara niz vrlo atraktivnih i neobičnih oblika: sedrene barijere, sedrena riječna korita, sedreni otoci i spilje.

First survey of the dragonfly fauna (Insecta, Odonata) of northwestern Bosnia

“…The Una River is the main watercourse of the region. The Bosnian part of the upper Una River basin is situated in the mountainous region where the river flows through gorges and is often torrential (Bognar, 2005;International Sava River Basin Commission, 2009). In its lower reaches, particularly from the mouth of the Sana River, it changes into a mild and slow flowing river until its confluence with the Sava River (Matoničkin & Pavletić, 1963).…”

Jame, denudirane jame in udornice kot kazalniki nekdanjega hidrološkega delovanja planote Grabovica (Bosna in Hercegovina)

“…The part of the Dinaric Alps that exhibits well-developed karst is usually referred to as the Dinaric Karst (Mihevc, Prelovšek, 2010). Characteristic features associated with the Dinaric Karst are extensive mountain ranges, large corrosion plains and intramontane basins that host karst poljes (Bognar, 1992;Bonacci, 2004;Bognar, 2006;Mihevc, 2010;Pahernik, 2012;Bonacci, 2013). Surface is dissected by middle and small-scale karst features such as dolines, collapse dolines, uvalas, denuded caves, canyons and dry valleys.…”