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Notes on the Geography of Morocco: Irrigation technologies: Photo 12

world pictures Morocco: Irrigation technologies

Ingenious as such systems are, they're inefficient compared to the large-scale systems introduced by the French. This canal's empty, but when the water level in the foreground rises to a critical height, the floating and balanced gate opens automatically, rising buoyantly and letting water flow downstream, away from the camera. The system is in this way adjusted so that canal offtakes behind the camera receive water before any water is allowed to pass through the gate and to downstream offtakes.

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