宇田川暗渠（宇田川幹線）

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宇田川暗渠（宇田川幹線） flows into 渋谷川暗渠（千駄ヶ谷幹線） , which it joins at N 35° 39′ 36″, E 139° 42′ 6″ at OSM node n2078327956, and there 9 km of total upstream flows in. load it's distributaries

宇田川暗渠（宇田川幹線） has 2 tributaries.

• 宇田川松濤支流暗渠, which joins it at N 35° 39′ 41″, E 139° 41′ 48″ at OSM node n9572938459, and 641 m of total upstream flows in.
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• (unnamed), which joins it at N 35° 40′ 9″, E 139° 40′ 46″ at OSM node n2125969012, and 534 m of total upstream flows in.
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