Index Catalog // ScholarsArchive@OSU

Make it Rain : A Lagrangian Approach to Investigate Land Surface Controls on Moisture Recycling in the Columbia River Basin

Creator:: Tai, Leah Chung-Mei
Abstract:: Linkages between land use and its influence on the atmosphere have been a long-standing research area. For example, what is the impact of irrigated agriculture on downwind rainfall? Global-scale models show that moisture recycling is an important source of water for inland regions around the world, but they do not...
Resource Type:: Masters Thesis
Full Text:: ratios. Observational studies at the local scale report both increased and decreased rainfall

Field evaluation of passive capillary samplers in monitoring the leaching of agrochemicals

Creator:: Brandi-Dohrn, Florian M.
Abstract:: Soil solution samplers have certain inadequacies that limit their range of possible applications. Passive Capillary Samplers (PCAPS), which apply suction to the soil pore-water via a fiber glass wick, have shown promising results in preliminary experiments in regard to collection efficiency of water and of bromide tracers. The objectives of...
Resource Type:: Masters Thesis
Full Text:: Bottles 30 Bias in Measurements of Bottle no.1 31 Breakthrough of the Sorbing Tracers 34 Estimation of

Assessment of variability and monitoring methods for leaching under cover crop management

Creator:: Hess, Mario
Abstract:: The contamination of ground water resources represents a serious problem and a prominent threat to the health of our society. This study focuses on the leaching of inorganic anions as a function of agricultural practices under natural field conditions. In order to enhance the understanding of such leaching processes, this...
Resource Type:: Masters Thesis
Full Text:: uncorrelated. No spatial correlation was seen in hydrodynamic dispersion coefficients. Percolation was

Investigating One-way Stream-aquifer Connectivity on Streamflow Predictions during Hydrologic Extremes in the National Water Model

Creator:: Jachens, Elizabeth R.
Abstract:: Surface water and groundwater are intimately connected by a two-way flux between the stream and the underlying aquifers; a complicated yet crucial relationship to represent in models. However, the National Water Model currently only considers a one-way flux, where groundwater can enter a stream but cannot return to the aquifer....
Resource Type:: Masters Thesis
Full Text:: representing statistically significant results compared to gaining streams. For droughts, there was no

Evaluation of techniques for on-farm monitoring of percolation and irrigation system performance

Creator:: Louie, Michael J.
Abstract:: Efficient use of water in agricultural production involves accurate assessment and control of the quantity and spatial uniformity of excess percolation. Passive Capillary Samplers (PCAPS), which sample water from the vadose zone have shown potential to provide superior estimates of soil water flux compared to alternative methods. In a four-year...
Resource Type:: Masters Thesis
Full Text:: provides no estimate of solute flux and the soil volume sampled is not known (England, 1974). Major

Understanding Aquifer Water Retention Dynamics Using Groundwater Head Relaxation Time

Creator:: Jimmie, Jordan A.
Abstract:: Diking and channelizing in the Toppenish Creek basin, associated with irrigated agricultural development, has altered its natural ecosystem function and hydraulic processes. We seek to answer two research questions: if surface waters are diverted for aquifer recharge in the winter, will this water be available for ecosystem function in the...
Resource Type:: Masters Thesis
Full Text:: additional stored water remain in the shallow subsurface aquifer? Flood waters no longer overtop the

Evaluation of stream temperature spatial variation using distributed temperature sensing

Creator:: O'Donnell, Tara
Abstract:: Water temperature in rivers and streams is an important factor for aquatic ecosystem health. Measurement of stream temperature has traditionally been accomplished by point temperature measurements, continuous point temperature loggers, and more recently, airborne remote sensing techniques such as Forward-Looking Infrared Radar (FLIR) or Thermal Infrared Radiometry. While each of...
Resource Type:: Masters Thesis
Full Text:: by fish as thermal refugia during stream temperature maximums, were located using DTS. No identified

Predicting nitrate concentrations in leachate resulting from land application of wastewater onto various crop systems including poplars

Creator:: Motte, Marie Quitterie
Abstract:: Land application of industrial wastewater with high levels of nitrogen requires adequate management practices to prevent groundwater pollution by nitrates. In this study a predictive computerized model was developed for nitrate leachate concentrations resulting from land application of wastewater onto crop systems including poplars. The study included a literature review,...
Resource Type:: Masters Thesis
Full Text:: application because there is no local municipal treatment facilities large enough to treat Norpac's waste

Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

Creator:: Smesrud, Jason K.
Abstract:: The agricultural production of peppermint has been shown to contribute significant quantities of nitrate-nitrogen to groundwater recharge. In an effort to provide new tools for increasing nitrogen efficiency within peppermint production, three research questions were proposed: i) How should plant tissue samples be collected to achieve the greatest precision when...
Resource Type:: Masters Thesis
Full Text:: stem nitrate spatial variability, no discernable range of autocorrelation was detected indicating a

Simulating the effects of a capillary barrier using the two-dimensional variably saturated flow model SWMS-2D/HYDRUS-2D

Creator:: Heiberger, Thilo Stefan
Resource Type:: Masters Thesis
Full Text:: a three meter long capillary barrier for a simulation with no defects in comparison to simulations

ScholarsArchive@OSU

Make it Rain : A Lagrangian Approach to Investigate Land Surface Controls on Moisture Recycling in the Columbia River Basin

Field evaluation of passive capillary samplers in monitoring the leaching of agrochemicals

Assessment of variability and monitoring methods for leaching under cover crop management

Investigating One-way Stream-aquifer Connectivity on Streamflow Predictions during Hydrologic Extremes in the National Water Model

Evaluation of techniques for on-farm monitoring of percolation and irrigation system performance

Understanding Aquifer Water Retention Dynamics Using Groundwater Head Relaxation Time

Evaluation of stream temperature spatial variation using distributed temperature sensing

Predicting nitrate concentrations in leachate resulting from land application of wastewater onto various crop systems including poplars

Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

Simulating the effects of a capillary barrier using the two-dimensional variably saturated flow model SWMS-2D/HYDRUS-2D

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