The river 's total length is 2,400 kilometres ( 1,500 mi ) and its drainage basin totals 534,739 square kilometres ( 206,464 sq mi ) in area , providing a mean discharge of around 97.4 cubic kilometres ( 23.4 cu mi ) of water per year .
The river 's total length is 2,400 kilometres ( 1,500 mi ) and its drainage basin totals 534,739 square kilometres ( 206,464 sq mi ) in area .