In geography, what is the difference between infiltration and percolation?

Question

In geography, what is the difference between infiltration and percolation?

Answer 1

Infiltration is when someone illegally crosses the border into another country while percolation is a oftenly a legal transition from one country to another.

Answer 2

infiltration is the passage of water though the ground surface. Percolation of water is the movement of water down through the soil profile until it reaches the upper level of saturation or the water table. Each will be controlled by a variety of parameters.

Answer  from  guderian  is totally incorrect.