The Siriul Mare is a right tributary of the river BuzÃÂu in Romania. It discharges into the Siriu Reservoir, which is drained by the BuzÃÂu, near Gura Siriului. Its length is and its basin size is .
The following rivers are tributaries of the Siriul Mare (from source to mouth):
Left: Vâna MÃÂlâei, Milea, Mreaja
Right: Morcovoaia, Siriul Mic, RoÃÂia Mare, Molidu, Monteoru, Valea Popii, Vaca Mare, Vaca MicÃÂ