拱洞河

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拱洞河 flows into 大年河 , which it joins at N 25° 39′ 48″, E 109° 8′ 0″ at OSM node n992257102, and there 161 km of total upstream flows in. load it's distributaries

拱洞河 has 4 tributaries.

• 黄奈河, which joins it at N 25° 34′ 18″, E 109° 10′ 33″ at OSM node n992257124, and 16 km of total upstream flows in.
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• (unnamed), which joins it at N 25° 32′ 47″, E 109° 9′ 34″ at OSM node n5150205728, and 14 km of total upstream flows in.
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• (unnamed), which joins it at N 25° 37′ 35″, E 109° 9′ 30″ at OSM node n5150100151, and 2 km of total upstream flows in.
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• (unnamed), which joins it at N 25° 39′ 1″, E 109° 9′ 22″ at OSM node n992257113, and 470 m of total upstream flows in.
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