黒岩川

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黒岩川 flows into 後志利別川 , which it joins at N 42° 25′ 26″, E 140° 9′ 18″ at OSM node n1463143736, and there 175 km of total upstream flows in. load it's distributaries

黒岩川 has 2 tributaries.

• 黒岩左股川, which joins it at N 42° 25′ 39″, E 140° 9′ 35″ at OSM node n1463144316, and 6 km of total upstream flows in.
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• (unnamed), which joins it at N 42° 24′ 56″, E 140° 10′ 21″ at OSM node n1463141513, and 671 m of total upstream flows in.
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