Generation mechanism of upwelling induced by submerged parallel walls

"Theory on upwelling generated by submerged obstacles being placed normally to the bottom flow is developed and verified by hydraulic experiments. Upwelling device consists of two vertical plates being parallel to each other. Experiments show that the upwelling is generated intermittently owing to emitting the energy produced by the pressure difference between inside and outside the wake formed behind the vertical plate. On the bases of the experimental results, we developed the upwelling theory in which we assumed that the upwelling energy is equal to the emitting energy. The theory shows that the rising height of upwelling waters depends on the pressure head decrease in wake, the height of upwelling device and the horizontal distance between two vertical plates, and the intermittent generation period of upwelling depends on the dimensions of upwelling device and the main flow velocity. It is also shown that the volume of upwelling water depends on the the total energy of the pressure head decrease in wake."