Typically, it's a 3-day process. On the first day, water is released onto the bog, flooding it with enough water to just cover the vine tips.
On the second day, water reels are driven onto the bog, knocking the fruit from the vines.
On the third day, the fruit is corralled and taken off the bogs with pumps or conveyors into waiting trucks. The trucks then proceed to the receiving station for cleaning and eventual processing.