Hi, do you want to do get this result from a 3d model or you just want to draw it in 2d?
If you are planning to get it from the 3d model, i think is possible with the process Mr. Ejrolon describes, using many patterns in one single composite material or using many layers with different patterns. If you want to do it from 2d, you can also do it, but then, why do it in Archicad? Youll get better results if you do it in Photoshop, Autocad, or even by hand which is where this graphic style comes front.
My guess is that it will be easier to do a composite material to simulate the horizontal ground layers, but the area around the draining fades in diferent directions so i think it would be easier to do with a 2d fill or in photoshop to create a seamless transition.