Spatial Distribution of Solutes in Aquifer Outcrop Zones along the Brazos River, East-Central Texas

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Article discussing the spatial distribution of solutes in aquifer outcrop zones along the Brazos River, East-Central Texas.

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8 p.

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Hudak, Paul F. Summer 2011.

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Article discussing the spatial distribution of solutes in aquifer outcrop zones along the Brazos River, East-Central Texas.

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8 p.

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Abstract: Concentrations of several solutes - nitrate, arsenic, sulfate, boron, chloride, and bromide - along with total dissolved solids (TDS) in ten counties bordering the Brazos River in east-central, Texas were compiled, mapped, and analyzed relative to regional land use and geology. Agriculture and oil/gas production are major activities and potential sources of groundwater contamination in the study area. Data were compiled from 104 water wells with a median depth of 446 ft (136 m) in the outcrop zones of six sedimentary aquifers: Carizzo-Wilcox, Queen City, Sparta, Yegua-Jackson, Gulf Coast, and Brazos Alluvium. Only two observations surpassed the 44.3 mg/L drinking water standard for nitrate, and four observations exceeded the 10 ug/L standard for arsenic. The median chloride concentration was 53 mg/L; however, the maximum level was almost three times the secondary drinking water standard of 250 mg/L. Chloride, bromide, sulfate, and boron concentrations resembled TDS patterns, with numerous samples exceeding secondary TDS drinking water standards in the Yegua-Jackson Aquifer. Most chloride/bromide ratios were between 100 and 300. Overall, results of this study suggest that natural processes exert a primary control on solute concentrations in the above aquifers, with a potential for modest anthropogenic impacts from agriculture and oil/gas production.

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  • International Journal of Environmental Research, 2011, Tehran: University of Tehran, pp. 595-602

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  • Publication Title: International Journal of Environmental Research
  • Volume: 5
  • Issue: 3
  • Edition: Summer
  • Page Start: 595
  • Page End: 602
  • Peer Reviewed: Yes

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  • Summer 2011

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  • March 22, 2013, 6:09 p.m.

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  • May 23, 2014, 3:51 p.m.

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Hudak, Paul F. Spatial Distribution of Solutes in Aquifer Outcrop Zones along the Brazos River, East-Central Texas, article, Summer 2011; [Tehran, Iran]. (digital.library.unt.edu/ark:/67531/metadc152433/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.