Index Catalog // ScholarsArchive@OSU

Modeling effect of initial soil moisture on sorptivity and infiltration

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...
Resource Type:: Article
Full Text:: Stewart, R. D., D. E. Rupp, M. R. Abou Najm, and J. S. Selker (2013), Modeling effect of initial soil

A resonating rainfall and evaporation recorder

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...
Resource Type:: Article
Full Text:: recorder A resonating rainfall and evaporation recorder Ryan D. Stewart,1 Rolf Hut,2 David E. Rupp,3

Measurement Tool for Dynamics of Soil Cracks

Creator:: Stewart, Ryan D., Abou Najm, Majdi R., Rupp, David E., and Selker, John S.
Abstract:: Shrinkage cracks in soil function as a dominant control on the partitioning and distribution of moisture fluxes in the vadose zone. Their dynamics influence moisture balance and control water availability for runoff, deep infiltration, and near-surface storage. We present a new low-cost field instrument to monitor the temporal change in...
Resource Type:: Article
Full Text:: D. Stewart 1* , Majdi R. Abou Najm 1,2,3 , David E. Rupp 4,5 , John S. Selker 1 2 1

An Image-Based Method for Determining Bulk Density and the Soil Shrinkage Curve

Creator:: Stewart, Ryan D., Abou Najm, Majdi R., Rupp, David E., and Selker, John S.
Abstract:: Current laboratory methods for determining volume and bulk density of soil clods include dipping saran-coated clods in water (a destructive process due to the permanent coating), performing physical measurements on samples with well-defined geometries, or using expensive equipment and proprietary software (such as laser scanners). We propose an alternative method...
Resource Type:: Article
Full Text:: the Soil Shrinkage Curve 1 Ryan D. Stewart 1 *, Majdi R. Abou Najm 1,2 , David E. Rupp 3,4 , John

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2003 Winter

Creator:: Oregon State University. Women's Center
Resource Type:: Other
Full Text:: — 7:30 p.m. Eve Ensler’s Vagina Monologues performed at the LaSells Stewart Center. 14th — 4

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2003 Fall

Creator:: Oregon State University. Women's Center
Resource Type:: Other
Full Text:: Women’s Net- work. Tabatha Stewart, pre-doctoral intern at University of Counseling and Psycho- logical

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2004 Fall

Creator:: Oregon State University. Women's Center
Resource Type:: Other
Full Text:: ) will kick off “LUNAFEST™ Corvallis” at the LaSells Stewart Center. Made possible by Clif Bar Inc.—the

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2004 Spring

Creator:: Oregon State University. Women's Center
Resource Type:: Other
Full Text:: speech to a packed house at La Sells Stewart Center later that evening. During the conversation, she

W.I.R.E.'d zine : Women's intra-campus resource exchange ; Volume 5, Issue 1 (Winter 2011)

Creator:: Oregon State University. Women's Center
Resource Type:: Other
Full Text:: , LaSells Stewart Center Kilbourne was named by the 1 New York Times Magazine as one of the three most pop

Behavioral adaptations and the minimization of reproductive costs in the male red-sided garter snake, Thamnophis sirtalis parietalis.

Creator:: O'Donnell, Ryan P.
Abstract:: The benefits of reproduction are clear, but there are also costs. Much is known about the costs of reproduction in females, but only recently have male costs been investigated in any depth. These costs of reproduction may be minimized by appropriately modifying behavior, but there has been little research on...
Resource Type:: Masters Thesis
Full Text:: Ryan P. O’Donnell for the degree of Master of Science in Zoology presented on December 2, 2003

ScholarsArchive@OSU

Modeling effect of initial soil moisture on sorptivity and infiltration

A resonating rainfall and evaporation recorder

Measurement Tool for Dynamics of Soil Cracks

An Image-Based Method for Determining Bulk Density and the Soil Shrinkage Curve

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2003 Winter

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2003 Fall

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2004 Fall

W.I.R.E.'d zine : Women's intra-campus resource exchange : 2004 Spring

W.I.R.E.'d zine : Women's intra-campus resource exchange ; Volume 5, Issue 1 (Winter 2011)

Behavioral adaptations and the minimization of reproductive costs in the male red-sided garter snake, Thamnophis sirtalis parietalis.

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