water gate (n.)

• aqueduct
• arroyo
• bed
• canal
• culvert
• floodgate
• flume
• gate
• gulch
• gully
• headrace
• lock
• nullah
• penstock
• race
• runnel
• sluice
• spillway
• swash
• tailrace
• wadi
• watercourse
• waterway
• waterworks
• weir