Application of Iliric Biotic Index (IBI) - Spring Šajan

Ovim diplomskim radom određena je kvaliteta vode izvora Šajan te pripadajućeg toka, kao jedan od pritoka velike krške tekućice Cetine. Istraživanje, provedeno u prosincu 2021. godine, sadržava sastav makrozoobentoske zajednice i fizikalno – kemijske parametre vode na tri postaje. Obradom fizikalno – kemijskih parametara dobio se uvid u stanište (količine otopljenih plinova, pH, alkalitet, tvrdoću vode), dok se obradom kvalitativnog sastava zajednica makrozoobentosa izračunao Iliriski biotički indeks (IBI) prema kojem je određena kvaliteta vode izvora Šajan, koji spada u kategoriju čistih prirodnih voda.This graduation thesis has determined quality of the water from spring Šajan and associated flow, which is one of the tributaries to great karst river Cetina. The survey, carried out in December 2021., contains the composition of the macrozoobenthos community and physico – chemical parameters which gave insight to the habitat (quantities of dissolved gases, pH, alkalinity, hardness of water). The Iliric biotic index was calculated from qualitative composition of macrozoobenthos organisms, according to which the quality of the water was determined. The survey showed that water from spring Šajan belongs to clean, natural waters