大洞沢

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大洞沢 flows into 水窪川 , which it joins at N 35° 8′ 1″, E 137° 51′ 45″ at OSM node n735938064, and there 133 km of total upstream flows in. load it's distributaries

大洞沢 has 1 tributaries.

• (unnamed), which joins it at N 35° 8′ 1″, E 137° 51′ 54″ at OSM node n735695678, and 415 m of total upstream flows in.
load it's tributaries