구산천

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구산천 flows into 고막원천 , which it joins at N 35° 5′ 45″, E 126° 35′ 46″ at OSM node n5468607223, and there 84 km of total upstream flows in. load it's distributaries

구산천 has 1 tributaries.

• 평능천, which joins it at N 35° 5′ 40″, E 126° 35′ 8″ at OSM node n5468607207, and 4 km of total upstream flows in.
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