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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

<a href="/cs/project/GC14-15201J" target="_blank" >GC14-15201J: Podpovrchový transport vody, uhlíku a tepla - kombinovaný hydrologický, geochemický a izotopový přístup</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geochemical Journal

ISSN

0016-7002

e-ISSN

1880-5973

Svazek periodika

51

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

15

Strana od-do

423-437

Kód UT WoS článku

000413244900004

EID výsledku v databázi Scopus

2-s2.0-85018458257