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Rapid measurement of field-saturated hydraulic conductivity for areal characterization

January 1, 2009

To provide an improved methodology for characterizing the field‐saturated hydraulic conductivity (Kfs) over broad areas with extreme spatial variability and ordinary limitations of time and resources, we developed and tested a simplified apparatus and procedure, correcting mathematically for the major deficiencies of the simplified implementation. The methodology includes use of a portable, falling‐head, small‐diameter (∼20 cm) single‐ring infiltrometer and an analytical formula for Kfs that compensates both for nonconstant falling head and for the subsurface radial spreading that unavoidably occurs with small ring size. We applied this method to alluvial fan deposits varying in degree of pedogenic maturity in the arid Mojave National Preserve, California. The measurements are consistent with a more rigorous and time‐consuming Kfs measurement method, produce the expected systematic trends in Kfs when compared among soils of contrasting degrees of pedogenic development, and relate in expected ways to results of widely accepted methods.

Citation Information

Publication Year 2009
Title Rapid measurement of field-saturated hydraulic conductivity for areal characterization
DOI 10.2136/vzj2007.0159
Authors J. R. Nimmo, K. M. Schmidt, K. S. Perkins, J. D. Stock
Publication Type Article
Publication Subtype Journal Article
Series Title Vadose Zone Journal
Series Number
Index ID 70034246
Record Source USGS Publications Warehouse
USGS Organization Geology, Minerals, Energy, and Geophysics Science Center