Help with pressure washer effect

I would like to create an effect that is like washing away particles. Similar to the video below. In blender the water would be a force field (or similar) and the dirt is a particle system.

I need to move particles, but the solution doesn’t need to involve a force field, it just seems like that would be the way to achieve the effect.

Looks like force works pretty well after messing with the settings a bit. Need to read the docs.

If anyone has other suggestions, I’d like to hear them.

Dynamic paint would be a much easier way to do this.