Move points on Curve in Z base on the distances between points

I am try to write a definition that will move points on multiple of curves next to each other, and based on the distances between the points on the curves and to other points around it, the points within the distance threshold will move in Z direction relative to the distance to other points. So basically the effect is the closer the points then the higher points will move, and then interpolate curve will bend upwards. 

Any help is greatly appreciated