Water Act Article 50

When a water work adversely affects the interests of a water right holder, the authority-in-charge may order its proprietor to construct proper structures or provide other remedies.
中文原文 水利法第50條
興辦水利事業,有妨害其他水權人之利益者,主管機關得令興辦水利事業人建造適當之建造物,或採用其他補救辦法。

English translation for reference only; the Chinese text prevails. Not legal advice.