Amud Siphon

 water, pipeline

Nahal Amud is 150 meters deep. To overcome the natural obstacle, it was necessary to interrupt the continuous route of the canal and carry the water through steel pipes shaped like an inverted siphon, operating on the communicating vessels principle. The water flows down into the wadi and rises again on the other side. A steel pipe 3.10 meters in diameter and 700 meters long was laid in a trench cut in the Nahal Amud canyon. The pipe, completely encased in concrete, was buried at a depth of 5 meters in the 10 meter wide trench. The work of cutting the trench and laying the pipe for the Nahal Amud, was especially difficult and complicated, as the slope of the canyon walls often approached 100 percent.