Index Catalog // ScholarsArchive@OSU

An overview of the Oregon Water Quality Decision Aid (OWQDA) : a tool for assessing groundwater contamination risk from specific soil-pesticide combinations

Creator:: Huddleston, J. H. (James Herbert), 1942- and Oregon State University. Extension Service
Abstract:: The Oregon Water Quality Decision Aid (OWQDA) is a first-tier screening tool that allows you to make a broad determination of the likelihood that a specific chemical, when applied to a specific Oregon soil, will move through the soil and contaminate groundwater. This determination is called the groundwater vulnerability rating.
Resource Type:: Technical Report
Full Text:: , Extension soil science specialist, Oregon State University. Table 1.—Groundwater vulnerability ratings

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

Geostatistics applied to groundwater contaminant plume characterization

Creator:: Cooper, Richard Mark
Resource Type:: Masters Thesis
Full Text:: : Geostatistics Applied to Groundwater Contaminant Plume Characterization Abstract approved: Previous to this

Multivariate geostatistical analysis of groundwater contamination by pesticide and nitrate

Creator:: Smyth, Jeffrey D., Istok, Jonathan D., and Oregon State University. Water Resources Research Institute
Resource Type:: Technical Report
Full Text:: MULTIVARIATE GEOSTATISTICAL ANALYSI S OF GROUNDWATER CONTAMINATIO N

Multivariate geostatistical analysis of groundwater contamination by pesticide and nitrate

Creator:: Smyth, Jeffrey D.
Abstract:: A field study was conducted to determine the applicability of multivariate geostatistical methods to the problem of estimating and simulating pesticide concentrations in groundwater from measured concentrations of nitrate and pesticide, when pesticide is undersampled. Prior to this study, no published attempt had been made to apply multivariate geostatistics to...
Resource Type:: Masters Thesis
Full Text:: Geostatistical Analysis of Groundwater Contamination by Pesticide and Nitrate Abstract approved: / Jonathan

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:: Methods for Leaching Under Cover Crop Management by Mario Hess A THESIS submitted to Oregon

Measuring in situ biotransformation in BTEX-contaminated groundwater

Creator:: Alumbaugh, Robert E.
Abstract:: Benzylsuccinate (BSA), methylbenzylsuccinate (methylBSA), and ethylbenzylsuccinate (ethylBSA) are unambiguous anaerobic biotransformation products from toluene, xylenes, and ethylbenzene decay, respectively, and may be used to indicate intrinsic bioremediation is occurring at hydrocarbon-contaminated sites. In order to improve upon current methods that detect and quantify anaerobic hydrocarbon metabolites in field samples, solid-phase-extraction...
Resource Type:: Masters Thesis
Full Text:: Groundwater by Robert E. Alumbaugh A THESIS submitted to Oregon State University in partial fulfillment

Radon-222 as an indicator for nonaqueous phase liquids in the saturated zone : developing a detection technology

Creator:: Hopkins, Omar Snowden
Abstract:: Radon-222 gas has unique properties allowing it to be used as an indicator for the presence of organic phase liquids in the saturated zone. It naturally occurs in soils. It is radioactive, making quantitative detection straight forward. A noble gas, it is chemically inert and does not react with aquifer...
Resource Type:: Masters Thesis
Full Text:: Oregon State University in partial fulfillment of the requirements for the degree of Master of

Selenium measurement in ground water and biological material by instrumental neutron activation analysis

Creator:: Yousef, Samir
Abstract:: The utilization of ⁷⁷ [superscript m] Se, half life 17.5 s, and ⁷⁵ Se, half life 119.8 d, for quantification of trace amounts of Se in well water and biological materials by means of instrumental neutron activation analysis (INAA) is described. A Se detection limit of 0.03 ppm was achieved...
Resource Type:: Masters Thesis
Full Text:: Selenium measurement in ground water and biological

Radon-222 as an in situ partitioning tracer for quantifying nonaqueous phase liquid (NAPL) saturations in the subsurface

Creator:: Davis, Brian M.
Abstract:: This study investigated the use of radon-222 as an in situ partitioning tracer for quantifying nonaqueous phase liquid (NAPL) saturations in the subsurface. Laboratory physical aquifer models (PAMs), field experiments, and numerical simulations were used to investigate radon partitioning in static (no-flow) experiments and in single-well, 'push-pull' tests conducted in...
Resource Type:: Dissertation
Full Text:: submitted to Oregon State University in partial fulfillment of the requirements for the degree of

ScholarsArchive@OSU

An overview of the Oregon Water Quality Decision Aid (OWQDA) : a tool for assessing groundwater contamination risk from specific soil-pesticide combinations

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

Geostatistics applied to groundwater contaminant plume characterization

Multivariate geostatistical analysis of groundwater contamination by pesticide and nitrate

Multivariate geostatistical analysis of groundwater contamination by pesticide and nitrate

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

Measuring in situ biotransformation in BTEX-contaminated groundwater

Radon-222 as an indicator for nonaqueous phase liquids in the saturated zone : developing a detection technology

Selenium measurement in ground water and biological material by instrumental neutron activation analysis

Radon-222 as an in situ partitioning tracer for quantifying nonaqueous phase liquid (NAPL) saturations in the subsurface

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