O'Reilly logo

Unsaturated Zone Hydrology by Gary L. Guymon - Professor of Civil Engineering, Department of Civil and Environmental Engineering, University of California, Irvine CA 92717

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 3Energy States and Gradients

This chapter is concerned with the forces involved in bulk fluid movement. The movement of specific species dissolved in the fluid is left to subsequent chapters. The state or level of energy in unsaturated soil determines whether the fluid will move. Specifically, an energy gradient is required to move or cause fluid to flow. The speed of this flow depends on the magnitude of the energy gradient and a transfer parameter describing the relative ease or difficulty for flow to occur (see Section 4.1.2). A gradient is defined as a vector pointing in the direction of the greatest rate of increase of a function, in this case energy which is a function of space and time. An energy gradient is achieved in the mathematical ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required