Groundwater recharge and residence times evaluated by isotopes of hydrogen and oxygen, noble gases and CFCs in a mountain catchment in the Jizera Mts., northern Czech Republic

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00314228" target="_blank" >RIV/68407700:21110/17:00314228 - isvavai.cz</a>
Result on the web
<a href="https://www.jstage.jst.go.jp/article/geochemj/51/5/51_2.0469/_article" target="_blank" >https://www.jstage.jst.go.jp/article/geochemj/51/5/51_2.0469/_article</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.2343/geochemj.2.0469" target="_blank" >10.2343/geochemj.2.0469</a>

Result language
angličtina
Original language name
Groundwater recharge and residence times evaluated by isotopes of hydrogen and oxygen, noble gases and CFCs in a mountain catchment in the Jizera Mts., northern Czech Republic
Original language description
Groundwater recharge amounts and residence times were estimated in the quaternary aquifer of the Jizera Mountains, Czech Republic, using noble gases, 2H, 18O, 3H and CFCs. Tracer ages from years to decades were determined for water in a shallow sedimentary aquifer (three boreholes of 10, 20 and 30 m depth). Approximately 90–180 mm of precipitation (7–14% of annual precipitation) infiltrates to deep percolation. A mean percolation velocity of 0.6 m/y in the sedimentary Uhlířská aquifer was estimated based on an apparent groundwater age of 40 years at 30 m depth. A lumped parameter approach was used to calculate groundwater residence times based on synoptic evaluation of 3H/3He, 3H and CFCs. Groundwater apparent ages in the shallowest borehole (10 m depth) determined by 3H/3He are younger than those determined by CFCs. This discrepancy is caused by partial re-equilibration of water with modern air, and by admixing of water that has zero age. The pronounced variations of d18O values in the borehole may be ascribed to a young component quickly recharged from the air-exchanged stream water or through preferential flowpaths.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10501 - Hydrology

Project
<a href="/en/project/GC14-15201J" target="_blank" >GC14-15201J: Subsurface transport of water, carbon and heat - combined hydrological, geochemical and isotopic approach</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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