Siphon refers to filling an inverted U-shaped tubular structure with liquid by using the force phenomenon of liquid level height difference, placing the high end of the opening in the container filled with liquid, and the liquid in the container will continue to flow out of the opening at a lower position through the siphon.
According to the above definition, which of the following is not a siphon phenomenon?
Most of the water surface in the middle and lower reaches of the Yellow River in China is higher than the ground outside the embankment. In Henan and Shandong, farmers use the Yellow River to irrigate their farmland.