Comment on “Modeling of the interactions between forest vegetation, disturbances, and sediment yields” by Erkan Istanbulluoglu et al.

A shower system for a screening machine or unit. The shower system includes a spray nozzle connected to a movement arm, a driver for longitudinally moving the movement arm in a reciprocal path, and an indexing system adapted to allow limited axial rotation of the movement arm at predetermined longitudinal positions of the movement arm.