Assertion details
1 triples in cluster

tributary join larger river 1
1 source sentences

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  • SRC A confluence can occur in several configurations : at the point where a tributary joins a larger river ( main stem ) ; or where two streams meet to become the source of a river of a new name ( such as the confluence of the Monongahela and Allegheny rivers at Pittsburgh , forming the Ohio ) ; or where two separated channels of a river ( forming a river island ) rejoin at the downstream end .