The law of energy conversion and conservation is a universal law that generally applies in nature. At the very least, there is resistance in the stator windings of generators and motors. Current flowing through the resistor will generate heat (internal energy) and dissipate it. This alone proves that the energy in the system you designed is constantly consuming and. this obviously does not follow the laws of energy conversion and conservation. Perpetual motion therefore does not exist at all.
This is not a perpetual motion machine. Hydropower generates electricity to drive the water pump. The water pump uses electricity when operating. During the consumption process, part of the energy is pumped out and mixed with the water. then part of the electricity is converted. Internal energy is consumed, and this part of internal energy is wasted energy.