Istria's largest sinking stream - Pazinčica

U ovom radu provedene su analize hidroloških značajki voda Pazinčice. Radi se o vodotoku izraženog bujičnog karaktera koji ima češće pojave poplava zbog ograničenog kapaciteta njezine ponorske zone – Pazinske jame. Obrađeni su podaci o vodostajima, protocima te koncentracijama i pronosu suspendiranog nanosa. U radu je dan povijesni prikaz izraženijih poplava, značajke ponora i veze koje on ima s izvorima u Istri, kao i ostale njezine značajke i znamenitosti. Uz to, dan je i prikaz značajnijih ekoloških nepogoda koji služe kao primjer ranjivosti ekosustava te rječice.The paper analyses the hydrologic characteristics od the Pazinčica stream water. It is a stream with a marked torrential character and frequent floods due to the limited capacity of its ponor zone – Pazin Cave. Data about water levels, discharges, and concentrations and transport of suspended sediment is analysed. The paper presents historically significant floods, the characteristics of the ponor and its links with other springs in Istria, as well as its other features. In addition, the paper also presents some environmental accidents as an example of the vulnerability of the stream’s ecosystem