洞川
洞川 is 2 km long, and has a stream level of 3.
Map of 洞川
This area:
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osm.org
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osm.org Distributaries / Outflows
洞川 flows into 木瀬川
, which it joins at
N 35° 14′ 13″, E 137° 12′ 30″
at OSM node
n727019050,
and there 8 km of total upstream flows in.
Tributaries
洞川 has 0 tributaries.