A reservoir or small body of water that sits in front of a larger water system, like a canal or watermill, used to regulate water flow or collect water.
From 'fore-' (before/in front of) + 'bay' (a body of water). In hydraulic engineering, the 'fore-' prefix literally refers to the position—this bay comes before the main system, collecting water first.
Forebays are unsung heroes of water engineering: they let mills and dams work smoothly by acting as a buffer between chaotic nature and precise machinery. Without one, every storm would wreck the system.
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