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Unsaturated Zone Field Studies


Various processes within the unsaturated zone affect ground-water availability and portability, as well as concentrations of water vapor and trace gases in the atmosphere. The rate at which precipitation or applied irrigation water infiltrates, its redistribution following infiltration, and the partitioning of the redistributed soil moisture between ground-water recharge and evapotranspiration affect the rate at which the ground-water reservoir is replenished and the degree to which ground water might be contaminated by chemical applications, spills, or disposal. Consequently, knowledge of and methods to quantitatively measure and predict these processes are needed to determine the impact of such societal practices as irrigation development [...]

Child Items (47)


Contact :
Office of the Chief Scientist for Water
Principal Investigator :
Richard W Healy

Attached Files

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Field Applications of Unsaturated Zone Flow Theory.xml 117.07 KB application/xml

Project Extension



  • USGS National Research Program



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