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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...
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Full Text:: hydraulic conductivity profile David E. Rupp and John S. Selker Department of Bioengineering, Oregon State

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...
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Full Text:: recession hydrographs from sloping aquifers David E. Rupp1,2 and John S. Selker1 Received 2 April 2006

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:: Bogaart, Patrick W., Rupp, David E., Selker, John S., and van der Velde, Ype
Abstract:: Numerical solutions to the nonlinear Boussinesq equation, applied to a steeply sloping aquifer and assuming uniform hydraulic conductivity, indicate that late-time recession discharge decreases nearly linearly in time. When recession discharge is characterized by -dQ/dt=aQ[superscript b], this is equivalent to constant dQ/dt or b=0. This result suggests that a previously...
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Full Text:: Late-time drainage from a sloping Boussinesq aquifer Patrick W. Bogaart,1 David E. Rupp,2 John S

Creator:: Rupp, David E., Keim, Richard F., Ossiander, Mina, Brugnach, Marcela, and Selker, John S.
Abstract:: Multiplicative random cascades (MRCs) can parsimoniously generate highly intermittent patterns similar to those in rainfall. The elemental MRC model parameter is the cascade weight, which determines how rainfall at one scale is partitioned at the next smallest scale in the cascade. While it is known that the probability density of...
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Full Text:: Brugnach,5 and John S. Selker6 Received 30 July 2008; revised 30 January 2009; accepted 1 May 2009

Creator:: Stewart, Ryan D., Rupp, David E., Abou Najm, Majdi R., and Selker, John S.
Abstract:: A soil’s capillarity, associated with the parameter sorptivity, is a dominant control on infiltration, particularly at the onset of rainfall or irrigation. Many mathematical models used to estimate sorptivity are only valid for dry soils. This paper examines how sorptivity and its capillary component (as wetting front potential) change with...
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Full Text:: D. Stewart,1 David E. Rupp,2 Majdi R. Abou Najm,3 and John S. Selker1 Received 14 February 2013

Creator:: Stewart, Ryan D., Hut, Rolf, Rupp, David E., Gupta, Hoshin, and Selker, John S.
Abstract:: We propose a novel, accurate quantification of precipitation and evaporation, as needed to understand fundamental hydrologic processes. Our system uses a collection vessel placed on top of a slender rod that is securely fixed at its base. As the vessel is deflected, either by manual perturbation or ambient forcing (for...
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Full Text:: Hoshin Gupta,4 and John S. Selker1 Received 24 October 2011; revised 12 June 2012; accepted 13 June 2012

Creator:: Troch, Peter A., Berne, Alexis, Bogaart, Patrick, Harman, Ciaran, Hilberts, Arno G. J., Lyon, Steve W., Paniconi, Claudio, Pauwels, Valentijn R. N., Rupp, David E., Selker, John S., Teuling, Adriaan J., Uijlenhoet, Remko, and Verhoest, Niko E. C.
Abstract:: Based on a literature overview, this paper summarizes the impact and legacy of the contributions of Wilfried Brutsaert and Jean-Yves Parlange (Cornell University) with respect to the current state-of-the-art understanding in hydraulic groundwater theory. Forming the basis of many applications in catchment hydrology, ranging from drought flow analysis to surface...
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Full Text:: Paniconi,7 Valentijn R. N. Pauwels,8 David E. Rupp,9 John S. Selker,10 Adriaan J. Teuling,11 Remko

Creator:: Clark, Martyn P., Nijssen, Bart, Lundquist, Jessica D., and Rupp, David E.
Abstract:: This work advances a unified approach to process-based hydrologic modeling to enable controlled and systematic evaluation of multiple model representations (hypotheses) of hydrologic processes and scaling behavior. Our approach, which we term the Structure for Unifying Multiple Modeling Alternatives (SUMMA), formulates a general set of conservation equations, providing the flexibility...
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Full Text:: soilqliq,[x,y] vegEevapvegEtrans 0 z h veghtop veghbot F aqqtrans Qp sfcEevap Figure 1. Conceptual

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