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Irrigating Our Future

Pump Head-Capacity and System-Head Curves

April 27, 2017 Thad Plumley 0

These pump curves can be easily understood when seen on a graph. By Mike Allen I explained in two earlier columns how centrifugal pumps, specifically vertical turbine pumps, converted mechanical energy into hydraulic energy via […]

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Editor's Note

What Those Boxes Are All About

April 27, 2017 Thad Plumley 0

For more than a year you have noticed boxes titled “DACUM Codes” with many of Water Well Journal’s feature articles and columns. You might have wondered: “What in the world is DACUM?” or “How do […]

Feature

Variable Frequency Drives

April 27, 2017 Thad Plumley 0

They can do a whole lot more than turn a motor. By Brian Broga and Christopher Charland There have been a lot of articles written about variable frequency drives (VFDs) and how they work. Chances […]