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Susceptibility to Enhanced Chemical Migration from Depression-Focused Preferential Flow, High Plains Aquifer

Dates

Year
2008

Citation

Gurdak, Jason J., Walvoord, Michelle A., and McMahon, Peter B., 2008, Susceptibility to Enhanced Chemical Migration from Depression-Focused Preferential Flow, High Plains Aquifer: Vadose Zone Journal, v. 7, iss. 4, p. 1218-1230.

Summary

Aquifer susceptibility to contamination is controlled in part by the inherent hydrogeologic properties of the vadose zone, which includes preferential-flow pathways. The purpose of this study was to investigate the importance of seasonal ponding near leaky irrigation wells as a mechanism for depression-focused preferential flow and enhanced chemical migration through the vadose zone of the High Plains aquifer. Such a mechanism may help explain the widespread presence of agrichemicals in recently recharged groundwater despite estimates of advective chemical transit times through the vadose zone from diffuse recharge that exceed the historical period of agriculture. Using a combination of field observations, vadose zone flow and transport [...]

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Communities

  • USGS National Research Program

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Provenance

Added to ScienceBase on Tue Apr 23 14:38:01 MDT 2013 by processing file <b>Characterization of Biotic and Biogeochemical Interactions at Environmental Interfaces.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/5042163ae4b04b508bfd3335">https://www.sciencebase.gov/catalog/item/5042163ae4b04b508bfd3335</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.2136/vzj2007.0145

Citation Extension

journalVadose Zone Journal
parts
typePages
value1218-1230
typeVolume
value7
typeIssue
value4
citationTypeJournal Article

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