Index Catalog // ScholarsArchive@OSU

Determining in-channel (dead zone) transient storage by comparing solute transport in a bedrock channel–alluvial channel sequence, Oregon

Creator:: Gooseff, Michael N., LaNier, Justin, Haggerty, Roy, and Kokkeler, Kenneth
Abstract:: Current stream tracer techniques do not allow separation of in-channel dead zone (e.g., eddies) and out-of-channel (hyporheic) transient storage, yet this separation is important to understanding stream biogeochemical processes. We characterize in-channel transient storage with a rhodamine WT solute tracer experiment in a 304 m cascade-pool-type bedrock reach with no...
Resource Type:: Article
Full Text:: Justin LaNier, Roy Haggerty, and Kenneth Kokkeler1 Department of Geosciences, Oregon State University

Changes in hyporheic exchange flow following experimental wood removal in a small, low-gradient stream

Creator:: Wondzell, Steven M., LaNier, Justin, Haggerty, Roy, Woodsmith, Richard D., and Edwards, Richard T.
Abstract:: We investigated the response of hyporheic exchange flow (HEF) to wood removal in a small, low-gradient, gravel bed stream in southeast Alaska using a series of groundwater models built to simulate HEF for the initial conditions immediately after wood removal and 1 month, 2 years, 4 years, and 16 years...
Resource Type:: Article
Full Text:: experimental wood removal in a small, low-gradient stream Steven M. Wondzell,1 Justin LaNier,2,3 Roy Haggerty

Can carbon isotopes be used to predict watershed-scale transpiration?

Creator:: Pypker, T. G., Barnard, H. R., Hauck, M., Sulzman, E. W., Unsworth, Michael H., Mix, Alan C., Kennedy, A. M., and Bond, B. J.
Abstract:: The Penman‐Monteith equation is often used to estimate transpiration, but an important limitation to this approach, especially for mountainous forested sites, is an accurate estimate of canopy conductance averaged over the area of interest (Gs). We propose a method for estimating watershed‐scale transpiration using estimates of Gs derived from measurements...
Resource Type:: Article
Full Text:: -scale transpiration? T. G. Pypker,1 H. R. Barnard,2 M. Hauck,2 E. W. Sulzman,3 M. H. Unsworth,4 A. C

On the late-time behavior of tracer test breakthrough curves

Creator:: Haggerty, Roy, McKenna, Sean A., and Meigs, Lucy C.
Abstract:: We investigated the late-time (asymptotic) behavior of tracer test breakthrough curves (BTCs) with rate-limited mass transfer( e.g., in dual-porosity or multiporosity systems) and found that the late-time concentration c is given by the simple expression C = tₐ𝒹{C₀g-- [m₀(∂g/∂t)]}, for t >> tₐ𝒹 and tα >> tₐ𝒹, where tad is...
Resource Type:: Article
Full Text:: {COg -- [mo(Og/Ot)]}, for t >> tad and t• >> tad , where tad is the advection time, Co is the initial

Toward a formal definition of water scarcity in natural-human systems

Creator:: Jaeger, W. K., Plantinga, A. J., Chang, H., Dello, K., Grant, G., Hulse, D., McDonnell, J. J., Lancaster, S., Moradkhani, H., Morzillo, A. T., Mote, P., Nolin, A., Santelmann, M., and Wu, J.
Abstract:: Water scarcity may appear to be a simple concept, but it can be difficult to apply to complex natural-human systems. While aggregate scarcity indices are straightforward to compute, they do not adequately represent the spatial and temporal variations in water scarcity that arise from complex systems interactions. The uncertain effects...
Resource Type:: Article
Full Text:: . Hulse,6 J. J. McDonnell,7 S. Lancaster,8 H. Moradkhani,9 A. T. Morzillo,10 P. Mote,4 A. Nolin,8 M

An efficient method to estimate processing rates in streams

Creator:: Gonz alez-Pinz on, Ricardo and Haggerty, Roy
Abstract:: We provide an efficient method to estimate processing rates through simple algebraic relationships derived from the transient storage model equations. The method is based on the transport equations, but eliminates the need to calibrate highly uncertain (and intermediate) parameters. We demonstrate that under some common stream transport conditions dispersion does...
Resource Type:: Article
Full Text:: storage, and first-order irreversi- ble processing in a transient storage compartment are: @C @t ¼ �Q A

Feasibility of soil moisture monitoring with heated fiber optics

Creator:: Sayde, Chadi, Gregory, Christopher, Gil‐Rodriguez, Maria, Tufillaro, Nick, Tyler, Scott, van de Giesen, Nick, English, Marshal, Cuenca, Richard, and Selker, John S.
Abstract:: Accurate methods are needed to measure changing soil water content from meter to kilometer scales. Laboratory results demonstrate the feasibility of the heat pulse method implemented with fiber optic temperature sensing to obtain accurate distributed measurements of soil water content. A fiber optic cable with an electrically conductive armoring was...
Resource Type:: Article
Full Text:: Campbell, 1990; Bristow et al., 1994] �T r; tð Þ ¼ � q 0 4��c Ei �r2 4�t � � for 0 < t � t0 ð1Þ and

Scaling and predicting solute transport processes in streams

Creator:: Gonz alez-Pinz on, Ricardo, Haggerty, Roy, and Dentz, Marco
Abstract:: We investigated scaling of conservative solute transport using temporal moment analysis of 98 tracer experiments (384 breakthrough curves) conducted in 44 streams located on five continents. The experiments span 7 orders of magnitude in discharge (10⁻ ³ to 10³ m³/s), span 5 orders of magnitude in longitudinal scale (10¹ to...
Resource Type:: Article
Full Text:: about the mean), mn, is defined as mn ¼ 1 �0 Z1 0 t � ��1 � �n C tð Þdt ð3Þ mn ¼ Xn i¼0 n i

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:: described using Philip’s [1957b] two-term approximation: I ¼ S ffiffi t p þ Ct ð1Þ where I is cumulative

Transient groundwater chemistry near a river: Effects on U(VI) transport in laboratory column experiments

Creator:: Yin, Jun, Haggerty, Roy, Stoliker, Deborah L., Kent, Douglas B., Istok, Jonathan D., Greskowiak, Janek, and Zachara, John M.
Abstract:: In the 300 Area of a U(VI)-contaminated aquifer at Hanford, Washington, USA, inorganic carbon and major cations, which have large impacts on U(VI) transport, change on an hourly and seasonal basis near the Columbia River. Batch and column experiments were conducted to investigate the factors controlling U(VI) adsorption/desorption by changing...
Resource Type:: Article
Full Text:: acmi @t þ �m X Mi J¼1 �ij X MD k¼1 @mk;mj @t " # ¼ �mD @2ci ax2 � �mv @ci @x � !�im Cmi � Cimi

ScholarsArchive@OSU

Determining in-channel (dead zone) transient storage by comparing solute transport in a bedrock channel–alluvial channel sequence, Oregon

Changes in hyporheic exchange flow following experimental wood removal in a small, low-gradient stream

Can carbon isotopes be used to predict watershed-scale transpiration?

On the late-time behavior of tracer test breakthrough curves

Toward a formal definition of water scarcity in natural-human systems

An efficient method to estimate processing rates in streams

Feasibility of soil moisture monitoring with heated fiber optics

Scaling and predicting solute transport processes in streams

Modeling effect of initial soil moisture on sorptivity and infiltration

Transient groundwater chemistry near a river: Effects on U(VI) transport in laboratory column experiments

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