The river water forces strikes to land edges creates vibrations allow to move sand causing sediment and erosion process.

So by redefining the edge for river to understand this process, as water strikes the metal surface creates vibration, these vibrations travel though bars which by one end connected to ball that will start swinging and strikes to other system which is just at the edge of the first system, gets disturbed.

The second system contains many balls, which are connected to each other by two ways, one through bars and one through strings with different layer overlapping to each other. When the first system strikes this second system it loses its stable condition and went into action and balls tries to come out of the system but as they are connected to the string doesn’t allow them to go out.

So the machine will help to understand and document the logic process that how the two systems work closely at the edge-condition.