Search Results - Opsahl, Stephen P.

Water-quality observations of the San Antonio segment of the Edwards Aquifer, Texas, with an emphasis on processes influencing nutrient and pesticide geochemistry and factors affec... by Opsahl, Stephen P.

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Quality of surface-water runoff in selected streams in the San Antonio segment of the Edwards aquifer recharge zone, Bexar County, Texas, 1997-2012 / by Opsahl, Stephen P.

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Concentrations of selected constituents in surface-water and streambed-sediment samples collected from streams in and near an area of oil and natural-gas development, south-central... by Opsahl, Stephen P., Crow, Cassi L.

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Compounds of emerging concern in the San Antonio River basin, Texas, 2011-12. by Lambert, Rebecca B., Opsahl, Stephen P.

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Detections, concentrations, and distributional patterns of compounds of emerging concern in the San Antonio River basin, Texas, 2011-2012 / by Opsahl, Stephen P., Lambert, Rebecca B.

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Temporal and spatial variability of water quality in the San Antonio segment of the Edwards aquifer recharge zone, Texas, with an emphasis on periods of groundwater recharge, Septe... by Opsahl, Stephen P., Musgrove, MaryLynn, 1964-, Mecum, Keith E.

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Effects of urbanization on water quality in the Edwards Aquifer, San Antonio and Bexar County, Texas / by Opsahl, Stephen P., Musgrove, MaryLynn, 1964-, Mecum, Keith E.

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Sediment characteristics in the San Antonio River Basin downstream from San Antonio, Texas, and at a site on the Guadalupe River downstream from the San Antonio River Basin, 1966-2... by Crow, Cassi L., Banta, J. Ryan (John Ryan), Opsahl, Stephen P.

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Science to support the understanding of south Texas surface-water and groundwater resources in a changing landscape by Ockerman, Darwin J.

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