小古洞河

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小古洞河 flows into 松花江 , which it joins at N 46° 15′ 45″, E 129° 24′ 21″ at OSM node n3368084227, and there 26,272 km of total upstream flows in. load it's distributaries

小古洞河 has 1 tributaries.

• (unnamed), which joins it at N 46° 25′ 56″, E 129° 10′ 43″ at OSM node n12506525679, and 22 km of total upstream flows in.
load it's tributaries