Index Catalog // ScholarsArchive@OSU

Creator:: Benítez‐Buelga, Javier, Rodríguez‐Sinobas, Leonor, Sánchez Calvo, Raul, Gil‐Rodríguez, Maria, Sayde, Chadi, and Selker, John S.
Abstract:: The heat pulse probe method can be implemented with actively heated fiber optics (AHFO) to obtain distributed measurements of soil water content (θ) by using reported soil thermal responses measured by Distributed Temperature Sensing (DTS) and with a soil-specific calibration relationship. However, most reported applications have been calibrated to homogeneous...
Resource Type:: Article
Full Text:: , T2 T0 is the temperature rise resulting from heating (K), q’ is the energy input (J m21 s21), t is

Creator:: Stewart, Ryan D., Abou Najm, Majdi R., Rupp, David E., Lane, John W., Uribe, Hamil C., Luis Arumí, José, and Selker, John S.
Abstract:: Irrigation experiments on 12 instrumented field plots were used to assess the impact of dynamic soil crack networks on infiltration and run-off. During applications of intensity similar to a heavy rainstorm, water was seen being preferentially delivered within the soil profile. However, run-off was not observed until soil water content...
Resource Type:: Article
Full Text:: observed using the Student’s t-test (p-value> 0.09). A Copyright © 2014 John Wiley & Sons, Ltd. greater

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:: @t ¼ @ @x kh @h @x � � þ N ; ð3Þ where j is the drainable porosity or specific yield. Typically

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:: . Agency, Ada, Okla. Selker, J. S., C. K. Keller, and J. T. McCord (1999), Vadose Zone Processes, 339 pp

Creator:: Rupp, David E. and Selker, John S.
Abstract:: The method of recession analysis proposed by Brutsaert and Nieber (1977) remains one of the few analytical tools for estimating aquifer hydraulic parameters at the field scale and beyond. In the method, the recession hydrograph is examined as −dQ/dt = f(Q), where Q is aquifer discharge and f is an...
Resource Type:: Article
Full Text:: recession hydrographs from sloping aquifers David E. Rupp1,2 and John S. Selker1 Received 2 April 2006

Creator:: Selker, John S. and Schroth, Martin H.
Abstract:: The use of dimensionless scaling is ubiquitous to hydrodynamic analysis, providing a powerful method of extending limited experimetnal results and generalizing theories. Miller and Miller [1956] contributed a scaling framework for immiscible fluid flow through porous media that relied on consistency of the contact angle between systems to be compared....
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Full Text:: under- standing and selected complicating factors, Geoderma, 70, 133-163, 1996. Glass, R. J., T. S

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:: . Selker, B. M. Nijssen, T. S. Steenhuis, J. van Winkle, and E. Jolles, Water quality sampling under

Creator:: Selker, John S. and Haith, Douglas A.
Abstract:: Distributed temperature data are used as input and as calibration data for an energy based temperature model of a first order stream in Luxembourg. A DTS (Distributed Temperature Sensing) system with a fiber optic cable of 1500m was used to measure stream water temperature with 1m resolution each 2 min....
Resource Type:: Article
Full Text:: Development and Testing of Single-Parameter Precipitation Distributions JOHN S. SELKER AND DOUGLAS A. HAITH

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:: operation of a prototype device are shown. Citation: Ferre, T. P. A., and J. S. Selker (2007), A glass

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

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