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

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Chapter 6Equations of Isothermal Flow

Deterministic models of liquid (water) flow in the unsaturated zone are derived in this chapter. This is accomplished by using the three fundamental principles used over and over again in the classical physical sciences: conservation of energy, mass and momentum. Conservation of energy was presented in Chapter 3 where it was determined that a single energy potential (Image = ψ + z0) will suffice in most cases. Conservation of momentum was presented in Section 4.1 where it was determined that Darcy’s law will apply provided the inertial terms are negligible as they always are in unsaturated flow. Conservation of ...

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