Mountain lakes in Sutjeska National Park - evolutonary self-development
Emir Temimović, University of Sarajevo (BA)
Sutjeska National Park, besides the eponymous river and its valley, includes mountain morphostructures of Zelengora, Volujak and Maglic, situated in southeastern Bosnia and Herzegovina. These morphostructural units are also known as morphological region of southeast part of the Bosnian highlands or also as "Roof of Dinarids", as popularly called in the geographical literature. This morphological highland on a mountain Maglić is the highest point in Bosnia and Herzegovina (2386 m). Mountain Zelengora vault over 1000 m above sea level, with its highest peaks above 2000 m. At the morphological vault of Zelengora there are 8 lakes (Orlovačko, Štirinsko, Kotlaničko, Donje Bare, Gornje Bare, Black, White and Kladopoljsko Lake) which have polygenetic origin with dominant karst, glacial and fluvial-denundation impacts. Evolution of the lake basin has a natural self-development character, which can be monitored by so called "jezerina" that explains the parched lake basin. It is a consequence of the dual natural processes that work simultaneously on the disappearance of lacustrine stability. Natural fluvial detritus entering the inflow zone so it uplifts lake bed. Due to this reasons there are many examples of decreasing the volumes of the lakes. By the regressive erosion of river lake, river bed has been continually deepened and occupies more lake water that finally leads to the drying of the lake. This is particularly pronounced in lakes Gornje i Donje Bare (Upper and Lower Ponds). Besides the natural, in the basin of Zelengora there are examples of creating artificial reservoirs named after the owners of these lakes. Self-development of evolution of lake basin on Zelengora are affected by the special protection regime because they belong to the National Park of Sutjeska.