chúi-thâu水頭

water conservancy head

water conservancy head; flood peak; peak of flow; bosun; boatswain; source of a river; headwaters; headspring; fountainhead (of a river, brook, etc.)

nauticalinformal

English Wiktionary, “水頭” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E6%B0%B4%E9%A0%AD · confidence: Medium (Wiktionary)