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Advances in Modeling of Water in the Unsaturated Zone

  • Chapter
Groundwater Flow and Quality Modelling

Part of the book series: NATO ASI Series ((ASIC,volume 224))

Abstract

This paper reviews recent advances in modeling of water flow in the unsaturated zone. The Richards model remains the most widely accepted and fertile framework for water flow analyses. More general formulations are reserved for the analysis of problems involving macroporosity, thermal effects, and air pressure effects. Many exact and approximate solutions have been derived for particular boundary value problems of homogeneous soils using methods such as quasi-linear analysis, Green-Ampt analysis, perturbation, and the kinematic wave approximation. Numerical simulators have become bigger and more accurate due to improvements in the areas of nonlinear solution procedures, mass conservation, computational efficiency, and computer hardware. Problems of natural heterogeneity have been addressed primarily through application of various stochastic methods to the Richards model. The stochastic formulations generally refute the concept of simple “equivalent” homogeneous properties, but do themselves offer a certain limited potential for a predictive capability.

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Authors and Affiliations

  1. Water Resources Program, Department of Civil Engineering, Princeton University, Princeton, New Jersey, 08544, USA

    P. C. D. Milly

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  1. P. C. D. Milly
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Editors and Affiliations

  1. Polytechnic University of Catalonia (ETSICCP/DIT) and International Course on Groundwater, Barcelona, Spain

    E. Custodio

  2. Polytechnic University of Catalonia (ETSIIB/DHT) and International Course on Groundwater, Barcelona, Spain

    A. Gurgui

  3. Civil Engineering National Laboratory, Lisbon, Portugal

    J. P. Lobo Ferreira

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© 1988 D. Reidel Publishing Company

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Milly, P.C.D. (1988). Advances in Modeling of Water in the Unsaturated Zone. In: Custodio, E., Gurgui, A., Ferreira, J.P.L. (eds) Groundwater Flow and Quality Modelling. NATO ASI Series, vol 224. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2889-3_28

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  • DOI: https://doi.org/10.1007/978-94-009-2889-3_28

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-7801-6

  • Online ISBN: 978-94-009-2889-3

  • eBook Packages: Springer Book Archive

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