古洞河

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古洞河 flows into 二道松花江 , which it joins at N 42° 38′ 46″, E 128° 4′ 13″ at OSM node n715800333, and there 528 km of total upstream flows in. load it's distributaries

古洞河 has 6 tributaries.

• 富尔河, which joins it at N 42° 43′ 29″, E 128° 9′ 48″ at OSM node n716513483, and 120 km of total upstream flows in.
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• (unnamed), which joins it at N 42° 53′ 10″, E 128° 35′ 14″ at OSM node n1590852325, and 57 km of total upstream flows in.
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• 寒葱河, which joins it at N 42° 57′ 13″, E 128° 29′ 7″ at OSM node n6554836484, and 20 km of total upstream flows in.
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• (unnamed), which joins it at N 42° 42′ 33″, E 128° 10′ 3″ at OSM node n5231368327, and 15 km of total upstream flows in.
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• (unnamed), which joins it at N 42° 53′ 49″, E 128° 34′ 57″ at OSM node n1590852360, and 11 km of total upstream flows in.
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• (unnamed), which joins it at N 42° 40′ 34″, E 128° 4′ 15″ at OSM node n12531652494, and 4 km of total upstream flows in.
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