What about

...through a floodgate, with an opening of interlocking and restricting doors.

Although I'm not 100% sure that the "opening" is necessary (most doors open). ;)

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Note added at 2 hrs (2010-10-23 16:26:01 GMT)
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Flood control system - Patent 4478534
by I Mcilwain - 1984 - Cited by 5 - Related articles
Automatically operated door for water control ... interlocking means on each of said floodgates for connecting a floodgate to an adjacent floodgate; ...
www.freepatentsonline.com/4478534.html

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Note added at 3 hrs (2010-10-23 17:24:25 GMT)
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@Edward:
I understand the sense of the sentence as "The movement will be through/via a floodgate, which has interlocking and restricting doors as opposed to other kinds of floodgates which have lift up barriers etc."

I understand this from "apertura" which is a noun.

;)

Floodgate - Types of floodgates
Bulkhead gates are vertical walls with movable, or re-movable, sections. Movable sections can be lifted to allow water to pass underneath (as in a sluice gate). Designs with removable sections allow water to pass over top and historically used stacked timbers to set the dam's crest height. Some floodgates in large levee systems slide sideways to open for various traffic. Miter gates are used in ship locks and usually close at an 18° angle to approximate an arch.



Hinged crest gates, are wall sections that rotate from vertical to horizontal, thereby varying the height of the dam. They are generally controlled with hydraulic power.
Variations;
flap gate
fish-belly flap gates
Bascule® gates
Pelican® gates



Radial gates are rotary gates consisting of cylindrical sections. They may rotate vertically or horizontally. Tainter gates are a vertical design that rotates up to allow water to pass underneath. Low friction trunnion bearings, along with a face shape that balances hydrostatic forces, allow this design close under its own weight as a safety feature.



Drum gates are hollow gate sections that float on water. They are pinned to rotate up or down. Water is allowed into or out of their flotation chamber adjusts the dam's crest height.



Roller gates are large cylinders that move in an angled slot. They are hoisted with a chain and have a cogged design that interfaces with their slot.
Clamshell gates have an external clamshell leaf design.




Other related archives
Canal lock, Newton, SI, Tainter gates, United States Bureau of Reclamation, acceleration, bearings, canals, cavitation, dam, dams, density, equation, erosion, g, gate valve, gravity, heads, height, hydraulic power, hydrostatic forces, kg, length, levee, locks, meters, needle valve, physics, pressure head, rectangle, reservoir, sluice gate, sluices, spillway, storm surge, stream, trunnion, water column, ρ