What is a shadof in Egypt

Spelled “shadoof.” A shadoof is a cantilevered lever used to draw water from wells, ponds or rivers from a waterproof container, such as a bucket, suspended by a rope from the unweighted arm of the lever. The weighted end, on the other side of a raised fulcrum, is on a shorter arm and offsets half the weight of a full container of water. On the longer end, a person pulls on the rope to pull down the container and its supporting arm. Filled, the counterweight cancels out most of the energy required to lift the weight of the water, which on a rope, can now be redirected into a portable container, trough, or, water channel, then this action is repeated.