Abstract
Water flow in soils can be characterized, in principle, for many boundary and initial conditions by solving the proper governing differential equations. There are several reasons why this state-of-the-art technology is not yet fully utilized. One reason may be complexity and expense of computer based numerical solutions. However, a more important reason is the difficulty of obtaining the primary input which is the relationship between matrix potential and hydraulic conductivity as a function of soil water content. Approximate water flow models based on physical principles or empirical results may simplify the computational requirements; however, soil property inputs are still required.
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Rawls, W.J., Brakensiek, D.L. (1989). Estimation of Soil Water Retention and Hydraulic Properties. In: Morel-Seytoux, H.J. (eds) Unsaturated Flow in Hydrologic Modeling. NATO ASI Series, vol 275. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2352-2_10
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DOI: https://doi.org/10.1007/978-94-009-2352-2_10
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