Index Catalog // ScholarsArchive@OSU

Creator:: Schlüter, S., Berg, S., Rücker, M., Armstrong, R. T., Vogel, H., Hilfer, R., and Wildenschild, D.
Abstract:: The macroscopic description of the hysteretic behavior of two-phase flow in porous media remains a challenge. It is not obvious how to represent the underlying pore-scale processes at the Darcy-scale in a consistent way. Darcy-scale thermodynamic models do not completely eliminate hysteresis and our findings indicate that the shape of...
Resource Type:: Article
Full Text:: , M. R€ucker3,4, R. T. Armstrong5, H.-J. Vogel1,6, R. Hilfer7, and D. Wildenschild2 1Department of

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:: , Leonor Rodr�ıguez-Sinobas1,2, Raul S�anchez Calvo1, Mar�ıa Gil-Rodr�ıguez1, Chadi Sayde3, and John S

Creator:: Chen, Duan, Leon, Arturo S., Gibson, Nathan L., and Hosseini, Parnian
Abstract:: Optimizing the operation of a multireservoir system is challenging due to the high dimension of the decision variables that lead to a large and complex search space. A spectral optimization model (SOM), which transforms the decision variables from time domain to frequency domain, is proposed to reduce the dimensionality. The...
Resource Type:: Article
Full Text:: - ing random coefficients. Consider a random process of QðtÞ and let �QðtÞ be its mean and C(s,t) 5 cov

Creator:: Beamer, J. P., Hill, D. F., Arendt, A., and Liston, G. E.
Abstract:: A comprehensive study of the Gulf of Alaska (GOA) drainage basin was carried out to improve understanding of the coastal freshwater discharge (FWD) and glacier volume loss (GVL). Hydrologic processes during the period 1980–2014 were modeled using a suite of physically based, spatially distributed weather, energy-balance snow/ice melt, soil water...
Resource Type:: Article

Creator:: Hui, Rui, Jachens, Elizabeth, and Lund, Jay
Abstract:: Traditional risk-based analysis for levee planning focuses primarily on overtopping failure. Although many levees fail before overtopping, few planning studies explicitly include intermediate geotechnical failures in flood risk analysis. This study develops a risk-based model for two simplified levee failure modes: overtopping failure and overall intermediate geotechnical failure from through-seepage,...
Resource Type:: Article

Creator:: Selker, John
Abstract:: Sloping interfaces of fine over coarse porous material have been considered for use as barriers to infiltration for many years. Previous literature has developed analytical solutions for flow over such interfaces, numerical simulation of such flow, and the effects of anisotropy on the diversion capacity of such a system. In...
Resource Type:: Article
Full Text:: shape for protective capillary barriers John Selker Department of Bioresource Engineering, Oregon

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:: 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...
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Full Text:: sampler An environmentally driven time-integrating water sampler John S. Selker and David E. Rupp

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:: 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

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