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Transport and time lag of chlorofluorocarbon gases in the unsaturated zone, Rabis Creek, Denmark

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Peter Engesgaard, Anker L. Højberg, Klaus Hinsby, Karsten H. Jensen, Troels Laier, Flemming Larsen, Eurybiades Busenberg, and L. Niel Plummer, 2004, Transport and time lag of chlorofluorocarbon gases in the unsaturated zone, Rabis Creek, Denmark: Vadose Zone Journal, v. 3, iss. 4.

Summary

Transport of chlorofluorocarbon (CFC) gases through the unsaturated zone to the water table is affected by gas diffusion, air–water exchange (solubility), sorption to the soil matrix, advective–dispersive transport in the water phase, and, in some cases, anaerobic degradation. In deep unsaturated zones, this may lead to a time lag between entry of gases at the land surface and recharge to groundwater. Data from a Danish field site were used to investigate how time lag is affected by variations in water content and to explore the use of simple analytical solutions to calculate time lag. Numerical simulations demonstrate that either degradation or sorption of CFC-11 takes place, whereas CFC-12 and CFC-113 are nonreactive. Water flow [...]

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Type Scheme Key
local-index unknown 70184480
local-pk unknown 70184480
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.2136/vzj2004.1249
series unknown Vadose Zone Journal

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journalVadose Zone Journal
parts
typevolume
value3
typeissue
value4
languageEnglish
citationTypeArticle

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