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Tackling Geoenvironmental Problems in the Unsaturated Zone: Principles and Practice
( Craig Benson ) 대한지질공학회 2019 대한지질공학회 학술발표회논문집 Vol.2019 No.2
Many geoenvironmental problems involve processes in the vadose zone, where flow and transport are complex, and rapid changes in conditions occur spatially and temporally. Historically this complexity made predictions highly uncertain, if not impossible. Advances over the last two decades have led to substantial improvements in characterization of hydraulic and transport properties in the vadose zone and predictions regarding flow and transport, permitting practical design and analysis with relative ease. New standard methods have made extremely tedious and complex measurements more practical and reliable, and new software packages have made predictions expedient. Modern methods used for vadose zone characterization are described, predictive models are presented, and examples are shared where unsaturated hydraulic properties and variably saturated flow modeling have been used to design and evaluate geoenvironmental problems in the vadose zone. The examples include comparisons with field data, demonstrating the strengths of current techniques as well areas in need of additional development.