The Rusca (also: Giumalău) is a left bank, south-flowing tributary of the river Bistrița in Romania. It flows into the Bistrița in the village Rusca.Rusca (jud. Suceava), e-calauza.ro There is another Bistrița tributary named Rusca less than 200 metres downstream, on the opposite bank. Its length is and its basin size is .
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