Floodgate

floodgatesgatestide gatefish-belly flap gatesflashboardFlashboardsflood gateflood gatesGatedstop gate
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.wikipedia
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Flood barrier

storm surge barriersurge barriertidal barrier
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.
A flood barrier, surge barrier or storm surge barrier is a specific type of floodgate, designed to prevent a storm surge or spring tide from flooding the protected area behind the barrier.

Dam

earthfilldamsconcrete-face rock-fill dam
They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system.
Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions.

Spillway

Uncontrolledun-gated spillwayspillways
They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system.
Floodgates and fuse plugs may be designed into spillways to regulate water flow and reservoir level.

Stoplogs

stoplog
Stoplogs are hydraulic engineering control elements that are used in floodgates to adjust the water level or discharge in a river, canal, or reservoir.

Lock (water navigation)

locklockscanal lock
A pound lock has a chamber with gates at both ends that control the level of water in the pound.

Tainter gate

radial gateradial gatesradial (Tainter) gates
The Tainter gate is a type of radial arm floodgate used in dams and canal locks to control water flow.

Sluice

sluice gatesluice gatessluices
They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system.

Delta Works

Delta PlanOesterdamDelta Project
The works consist of dams, sluices, locks, dykes, levees, and storm surge barriers located in the provinces of South Holland and Zeeland.

Lake

lacustrinefreshwater lakenatural freshwater lake
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.

River

riverineriparianleft bank
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.

Stream

creekstreamscreeks
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.

Levee

dikedikesdyke
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems.

Canal

canalsnavigationsartificial waterway
They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system.

Storm surge

storm tidetidal surgestorm surges
They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system.

Detention basin

detention ponddetentiondetention basins
In the case of flood bypass systems, floodgates sometimes are also used to lower the water levels in a main river or canal channels by allowing more water to flow into a flood bypass or detention basin when the main river or canal is approaching a flood stage.

Pressure

water pressurenegative pressurefluid pressure

Hydraulic head

headhydraulic gradientpressure head
Other design requirements include taking into account pressure head operation, the flow rate, whether the valve operates above or below water, and the regulation of precision and cost.

Erosion