Suppose a situation where we are going to apply Bernoulli principle to find the velocity of a water stream leaving at the bottom of a large lake. When we apply the Bernoulli theory, we consider a stream line from the surface of the lake that runs through a hole located at the bottom of the dam, through which water is leaking. We consider a streamline and take the
pressure at the surface=atmospheric pressure
on the same streamline at the bottom, but inside the dam;
pressure =atmospheric pressure + hydrostatic pressure
so in this case the potential energy component at the top of the streamline has become the hydrostatic pressure component at the bottom of the streamline. in such a case should we neglect both hydrostatic pressure as well as potential energy component as they are going to be cancelled out?