What is "radobolja"

Radobolja is a river in Bosnia and Herzegovina. It is five kilometers long and its spring is located below the Mikuljaca hill in Mostar's suburb of Ilici. Radobolja flows through Mostar and flows into the Neretva River near the Old Bridge. During the Ottoman rule water from Radobolja was used for irrigation and drinking, however today's Radobolja is polluted due to discharge of waste-water.