Abstract
The terms, laminar flow and purely viscous flow, are used synonymously to mean soil water movement which flows in laminas or layers, as opposed to turbulent flow in which the velocity components have random turbulent fluctuations distorting their mean values. Laminar flow conditions exist in soils because of the low flow velocities restricted by the small pores. In fact, for agricultural soil water conditions, turbulent flow velocities are virtually nonexistent. Darcy’s Law, describing the laminar flow conditions within the soil profile can be stated as:
Q = —K i A
where Q = discharge rate of volume per unit time (cm3/sec)
A = cross sectional area of flow (cm2)
K = hydraulic conductivity (cm/sec)
i = hydraulic gradient (cm/cm) = \(\frac{{d{\psi _h}}}{{dL}}\) .
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© 1991 Springer Science+Business Media Dordrecht
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Perrier, E.R., Salkini, A.B. (1991). Darcy Equation. In: Perrier, E.R., Salkini, A.B., Ward, C.F. (eds) Supplemental Irrigation in the Near East and North Africa. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3766-9_7
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DOI: https://doi.org/10.1007/978-94-011-3766-9_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-5676-2
Online ISBN: 978-94-011-3766-9
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