by: Brian Herrin
One of the difficulties of modeling a flowing water system is the size of the system and the quickness of the flow. This often makes demonstrations hard to visualize as things happen so quickly. The model I designed uses large transparent plastic cups and clear tubing that connects them to easily demonstrate how a river can become contaminated by a toxic spill or dump and how the toxic material slowly works its way downstream creating devastation along the way. In time, the river will eventually run clean, but the damage takes much longer to disappear, and some damage may be permanent.