Index Catalog // ScholarsArchive@OSU

Assessment of ground water recharge and quality under agricultural production in Lane County, Oregon

Creator:: Shelby, Patrick M.
Abstract:: Assessment of the environmental impacts of an agricultural production system requires information on both soil water quality and solute flux. Passive Capillary Samplers (PCAPS), which sample water from the vadose zone using fiber glass wicks, have shown potential to provide both flux and solute concentration in unsaturated zone sampling but...
Resource Type:: Masters Thesis
Full Text:: . To assess agriculture's contribution to NO3 pollution of groundwater, leaching losses must be

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:: pollution, societies have become to rely more on ground water. In the former German Democratic Republic

Nitrate and pesticide transport under pear production in clay and sandy soil

Creator:: Cao, Weidong
Abstract:: Groundwater contamination on irrigated land is of concern in this nation and around the world. In order to reduce the potential of groundwater contamination by agricultural practices such as irrigation, fertilizer and pesticide application, vadose-zone monitoring and sampling are needed. The main objective of this study was to evaluate impacts...
Resource Type:: Masters Thesis
Full Text:: groundwater pollution include agricultural nutrients (e.g. nitrate and phosphate) and pesticides, heavy

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:: reduction of nitrate loading to groundwater AN ABSTRACT OF THE THESIS OF Jason K. Smesrud for the

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:: prevent groundwater pollution by nitrates. In this study a predictive computerized model was developed

Monitoring potential groundwater contamination due to agricultural production in Lane County, Oregon

Creator:: Gatchell, Lance O.
Resource Type:: Masters Thesis
Full Text:: Monitoring Potential Groundwater Contamination due to

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:: hydrologic literature. In many regions water supply is strongly dependent upon groundwater as a source

Chemical and isotopic patterns of nitrate variability in the southern Willamette Valley, Oregon

Creator:: Vick, Christopher Flanders
Abstract:: A relatively stable, persistent and historical problem with elevated NO₃⁻ concentrations in rural drinking wells in the southern Willamette Valley, Oregon is evident. What is the origin of NO₃⁻ in rural drinking water wells in this area? The answer to the question is not simple. Many non-point sources contribute to...
Resource Type:: Masters Thesis

An eleven year study of nitrate leaching in vegetable production with winter cover crops

Creator:: Feaga, Jeff
Abstract:: The Willamette Valley of Oregon has high rates of winter precipitation that cause leaching losses of residual fertilizer nitrogen (N) as nitrate (NO₃). Cover crops may have potential to mitigate N loss. Shallow groundwater was sampled for 11 years from plots planted in summer vegetables with and without winter cover...
Resource Type:: Masters Thesis

A study of stream temperature using distributed temperature sensing fiber optics technology in Big Boulder Creek, a tributary to the Middle Fork John Day River in eastern Oregon

Creator:: Arik, Aida D.
Abstract:: The Middle Fork John Day Basin in Northeastern Oregon is prime habitat for spring Chinook salmon and Steelhead trout. In 2008, a major tributary supporting rearing habitat, Big Boulder Creek, was restored to its historic mid-valley channel along a 1 km stretch of stream 800 m upstream of the mouth....
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Assessment of ground water recharge and quality under agricultural production in Lane County, Oregon

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

Nitrate and pesticide transport under pear production in clay and sandy soil

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

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

Monitoring potential groundwater contamination due to agricultural production in Lane County, Oregon

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

Chemical and isotopic patterns of nitrate variability in the southern Willamette Valley, Oregon

An eleven year study of nitrate leaching in vegetable production with winter cover crops

A study of stream temperature using distributed temperature sensing fiber optics technology in Big Boulder Creek, a tributary to the Middle Fork John Day River in eastern Oregon

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