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Knowledge of soil and landscape hydrology is essential to evaluating the processes and quality of terrestrial ecosystems. Of particular interest in Southern Minnesota is the extensive Clarion-Nicollet-Webster catena, for which little quantitative work has been done in the region. The objective of this study was to investigate the relationship between soil hydrology and morphology for an undrained catena in south-central Minnesota. Seven points along a 125-m summit-to-wetland transect were instrumented with piezometers (25, 50, 100, and 200 cm), observation wells (300 cm), Pt electrodes (25, 50, 100 cm, footslope only), and thermocouples (10, 25, 50, 100 cm). Mollic epipedons were 77-cm thick at the footslope (Cumulic Endoaquoll), thinning to 39 cm at the summit (Oxyaquic Hapludoll). The lower hillslope positions had low chroma colors below the mollic horizon, indicative of reducing conditions. The water table frequently was located in the mollic horizon for these soils and redox potentials at the footslope were frequently |
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