Variable frequency drives (VFDs), also known as variable speed drives (VSDs), are used to modulate the speed of motors in various applications, from hydronic water pumping to VAV fan units to vacuum ...

Climate change is disrupting the seasonal flow of rivers in the far northern latitudes of America, Russia and Europe and is posing a threat to water security and ecosystems, according to new research.

A rare natural phenomenon sees rivers flowing in two directions. This occurs where strong ocean tides push water upstream ...

The dry-looking stream in your backyard may play a major role in feeding U.S. rivers. Channels that flow only in direct response to weather conditions like heavy rain, called ephemeral streams, on ...

When two materials come into contact, charged entities on their surfaces get a little nudge. This is how rubbing a balloon on the skin creates static electricity. Likewise, water flowing over some ...