As described in a log entry from June 21, 2005, during my TranzAmerican Bike Ride...

"Waterpedes. That's what I call them. People have thought of ingeneous ways to bring water to the land to grow food.. irrigation from canals channeling water from dammed rivers, and sprinklers. Waterpedes are huge sprinklers that are anchored on one end and slowly pivot on wheels for hundred's of meters across a field, depending on how much area needs to be watered."