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Creator:: Walker, David S.
Abstract:: The shallow, poorly-confined, sand and gravel aquifer underlying the lower Malheur River basin is contaminated by nitrate and metabolites of the herbicide dimethyl tetrachloroterephthalate (DCPA), first detected in 1983 and 1985, respectively. The aquifer supplies water for the Ontario municipal water system, domestic and industrial uses, and irrigation. In response...
Resource Type:: Masters Thesis
Full Text:: Basin Near Ontario, Oregon Redacted for Privacy Abstract approved: r4onathan D. Istok The shallow

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:: , Oregon State University, Corvallis, Oregon 97331) Jonathan D. Istok Agricultural Engineering and

Creator:: Rea, Alan H.
Abstract:: A method was developed for assessing the vulnerability of groundwater to contamination from contaminant sources at the soil surface, using a numerical groundwater flow model linked to a digital map database. The method was applied using the pcARC/INFO Geographic Information System (GIS) to input, store, and manipulate base maps, resulting...
Resource Type:: Masters Thesis
Full Text:: Systems Abstract approved: T* Jonathan D. Istok A method was developed for assessing the

Creator:: Cooper, Richard Mark
Resource Type:: Masters Thesis
Full Text:: Jonathan D. Istok2 Introduction The term geostatistics refers to a set of statistical methods for

Creator:: Hoffmann, Heidi
Abstract:: Deposition of the Middle Devonian part of the Denay Limestone and Bay State Dolomite in the northern Antelope Range and Fish Creek Range, respectively, took place on and in front of a carbonate platform with a lime sand shoal at the shelf edge. In the Givetian part of the Denay...
Resource Type:: Masters Thesis

ScholarsArchive@OSU