원당천

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원당천 flows into (unnamed) , which it joins at N 35° 54′ 34″, E 127° 46′ 50″ at OSM node n3799980617, and there 18 km of total upstream flows in. load it's distributaries

원당천 has 2 tributaries.

• 구천계곡, which joins it at N 35° 54′ 32″, E 127° 46′ 54″ at OSM node n3694634191, and 9 km of total upstream flows in.
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• (unnamed), which joins it at N 35° 54′ 29″, E 127° 46′ 56″ at OSM node n3799980615, and 9 km of total upstream flows in.
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