Pressure exerted by a fluid for each foot of fluid height. For example: Fresh water exerts a gradient pressure of .433 psi/ft calculated in this manner: 4330 psi gage @ 10,000 less surface pressure of 0 psi is 4330: 0 = .433 psi/ft. 10,000 (WT)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}