(The Una River is a tributary of the Sava River.) The Sava is 990 kilometres (615 miles) long, including the 45-kilometre (28 mi) The population in the Sava River basin is estimated at 8,176,000, and it connects three national capitals—The name is believed to be derived from the Proto-Indo-European root The Sava Dolinka rises in the Zelenci Pools, west of The Sava then flows through the capital of Slovenia, The westernmost part of the 562-kilometre (349 mi) Sava River course in Croatia,East of Zagreb, the river turns southeast again further through the Downstream of confluence of the Una River, the Sava is once again tracing an international border—between Croatia and The 337.2-kilometre (209.5 mi) segment between the Una and the Drina confluences, marking corresponding to the entire length of the Sava flowing along the border of Bosnia-Herzegovina, exhibits small change of elevation—from 86.8 metres (285 feet) a.s.l at Jasenovac to 76.6 metres (251 feet) a.s.l. The Ljubljana Basin represents the boundary of the Southern Alps and the Dinarides. In 2007, significant sources of industrial pollution were identified in Slovenia, Bosnia and Herzegovina, and Serbia.The Sava River basin is very significant because of its There are several sports and recreational grounds located on the river course or gravel pit and artificial lakes adjacent to the Sava. Five interesting facts about the Sava: The name came from Indo-European root seu̯ which means "rain". Drava River, a major right-bank tributary of the Danube River, in south-central Europe. Tacen Whitewater Course, located on the right bank of the Sava in Worship of various river gods in the area dates to the The Sava River also appears symbolically in the coat of arms of the former sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFCroatian_Census2011 ( sfn error: no target: CITEREFSURS_Census_–_Naselja2002 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( sfn error: no target: CITEREFISRBCSeptember_2009 ( On average, the Drina is 50–60 m (160–200 ft) wide, but it ranges from only 12–20 m (39–66 ft) at Tijesno to up to 200 m (660 ft) at Bajina Bašta and Ljubovija. at Brčko Downstream from confluence of the Drina, the Sava River changes its eastward course to northeast, until it reaches The Sava discharges into the Danube, after reaching 68.3 metres (224 feet) a.s.l. It is formed by the headwaters of the Seven out of eight largest reservoirs in the Sava River basin are located in the Drina catchment, the largest among them being the 0.88-cubic-kilometre (0.21 cu mi) Lake Piva on the eponymous river in Montenegro, created after construction of Groundwater is a very important resource in the Sava River basin, generally used for public water supply of potable water, as a source of water for industrial use, but also as the mainstay of The course of the Sava River runs through several diverse The lower course of the Sava River is located in the Pannonian Basin—first reached by the Sava River in the Krško Basin on the western rim of the Pannonian Basin.There are 18 hydroelectric power plants with power generation capacity exceeding 10 The Sava is navigable to larger vessels for 593.8 kilometres (369.0 miles) between its confluence with the Danube in Belgrade, Serbia and Galdovo Bridge in The restricted draft and fairway is compounded with meandering of the river's course—limiting length of vessels—and low bridge clearance. Also, the discharge steadily grows: 125 cubic metres per second (4,400 cu.ft./s) at the Ćehotina's mouth, and 370 cubic metres per second (13,000 cu.ft./s) on the Drina's mouth into the Sava. The The Drina originates at an altitude of 432 meters (1,417 feet) and flows into the Sava at 75 meters (246 feet). Further problems are incurred through poor transport infrastructure along the route, including poor navigation markings, and presence of sunken vessels and unexploded The Sava River valley is also a route for road and rail traffic. Its slow surface flow from the springs near Vrhnika to the mouth to the Sava river has a length of 41 km, its total basin area (to its outflow into the river Sava) is 1884 km², of which 1100 km² is karstic.