Index Catalog // ScholarsArchive@OSU

Creator:: Louie, Michael J., Shelby, Patrick M., Smesrud, Jason S., Gatchell, Lance O., and Selker, John S.
Abstract:: Passive capillary samplers (PCAPS), which sample water from the vadose zone via a hanging water column in a fiberglass wick, have shown potential to provide superior estimates of soil water flux compared to alternative methods. The objectives of this study were to evaluate the performance of PCAPS under natural rain-fed...
Resource Type:: Article
Full Text:: ., A simple, tension-free lysimeter, Soil Sci., 105(2), 1-86, 1968. Knutson, J. H., and J. S. Selker

Creator:: Rupp, David E. and Selker, John S.
Abstract:: Solutions to the Boussinesq equation describing drainage into a fully penetrating channel have been used for aquifer characterization. Two analytical solutions exist for early- and late-time drainage from a saturated, homogeneous, and horizontal aquifer following instantaneous drawdown. The solutions for discharge Q can be expressed as dQ/dt = −aQ [superscript...
Resource Type:: Article
Full Text:: hydraulic conductivity profile David E. Rupp and John S. Selker Department of Bioengineering, Oregon State

Creator:: Niemet, Michael R., Rockhold, Mark L., Weisbrod, Noam, and Selker, John S.
Abstract:: Liquid saturation and gas-liquid interfacial area are important parameters for evaluating the transport and fate of contaminants in unsaturated subsurface environments. Recent findings indicate that interfacial surface area controls the relative degree of transmitted light in laboratory systems containing translucent porous media. Equations are derived to estimate the specific gas-liquid...
Resource Type:: Article
Full Text:: saturated porous media Michael R. Niemet,1,2 Mark L. Rockhold,1,3 Noam Weisbrod,1,4 and John S. Selker1

Creator:: Selker, John and Ferre, Ty P. A.
Abstract:: None
Resource Type:: Article
Full Text:: special section on Hydrologic Measurement Methods John Selker1 and Ty P. A. Ferre2 Received 10 March

Creator:: Ferre, Ty P. A. and Selker, John S.
Abstract:: A new apparatus is presented that is capable of applying a constant fluid pressure at inflow and outflow boundaries. The apparatus can be refilled during operation and does not rely on an overflow mechanism. The device is constructed of two vessels, one that contains the delivered fluid and the other...
Resource Type:: Article
Full Text:: Wales apparatus to apply constant head boundary conditions Ty P. A. Ferre1 and John S. Selker2

Creator:: Selker, John S. and Rupp, David E.
Abstract:: Quality concerns drive many water studies and practices, but obtaining samples from water bodies over time and space for quality determination is often difficult and expensive. We present a low-cost approach that allows integration of water samples over timescales of days to months to allow more widely distributed acquisition of...
Resource Type:: Article
Full Text:: sampler An environmentally driven time-integrating water sampler John S. Selker and David E. Rupp

Creator:: Weisbrod, Noam, Niemet, Michael R., McGinnis, Thomas, and Selker, John S.
Abstract:: Water vapor transport in the vicinity of imbibing saline solutions was investigated in two-dimensional (2-D) chambers using a light transmission technique. Concentrated NaNO3 solutions (brines) were applied as point sources to the surface of homogenous packs of prewetted silica sand for four different sand grades. The same solutions were applied...
Resource Type:: Article
Full Text:: Thomas McGinnis, and John S. Selker Department of Bioengineering, Oregon State University, Corvallis

Creator:: Ochiai, Naoyuki, Kraft, Erika L., and Selker, John S.
Abstract:: Prediction of colloid transport in the subsurface is relevant to researchers in a variety of fields such as contaminant transport, wastewater treatment, and bioremediation. Investigations have traditionally relied on column studies whereby mechanistic inferences must be drawn on the basis of colloid behavior at the outlet. Over the past decade,...
Resource Type:: Article
Full Text:: and John S. Selker2 Received 10 February 2006; revised 7 July 2006; accepted 21 September 2006

Creator:: Burns, Erick R., Selker, John S., Parlange, Jean-Yves, and Guenther, Ronald B.
Abstract:: Though many arid and contaminated sites have high salinity, prediction of effects of salinity on water movement in soils has been based on dilute solution approximations. Here a sensitivity analysis compares predicted liquid and vapor pressure in variably saturated porous media found using both the dilute approximations and a more...
Resource Type:: Article
Full Text:: saturated porous media Erick R. Burns,1,2,3 John S. Selker,1 Jean-Yves Parlange,4 and Ronald B. Guenther2

Creator:: Flint, Lorraine E., Flint, Alan L., and Selker, John S.
Abstract:: Natural hydraulic barriers exist at Yucca Mountain, Nevada, a potential high-level nuclear waste repository, that have been identified as possible lateral diversions for reducing deep percolation through the waste storage area. Historical development of the conceptual model of lateral diversion has been limited by available field data, but numerical investigations...
Resource Type:: Article
Full Text:: Survey, Sacramento, California, USA John S. Selker Department of Bioresource Engineering, Oregon State

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