Estimating groundwater mean transit time from SF6 in stream water: field example and planning metrics for a reach mass-balance approach
Estimating groundwater mean transit time from SF6 in stream water: field example and planning metrics for a reach mass-balance approach
复制标题
估算溪流水中 SF6 的地下水平均传输时间:达到质量平衡方法的现场示例和规划指标
DOI:
10.1007/s10040-021-02435-8
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发表时间:
2022
影响因子:
2.8
通讯作者:
Zlotnik, Vitaly A.
中科院分区:
文献类型:
--
作者:
Jensen, Craig R.;Genereux, David P.;Gilmore, Troy E.;Solomon, D. Kip;Mittelstet, Aaron R.;Humphrey, C. Eric;MacNamara, Markus R.;Zeyrek, Caner;Zlotnik, Vitaly A.
Stream reach mass-balance can be used to estimate groundwater age at scales larger than individual wells. Atmospherically derived SF6 was used as an age-dating tracer in reach mass-balance analysis of six stream reaches in Nebraska, USA. The goal was to estimate the flow-weighted mean SF6 concentration in the groundwater discharge to each reach (C gw) and the groundwater mean transit time (MTT) based on C gw. The C gw in one reach (1.48 fmol/kg) was consistent with a MTT of 27 years. High uncertainty in C gw prevented plausible MTT estimates in the other reaches. Monte Carlo analyses indicated that low rates of groundwater inflow to the stream reaches (Q gw) led to high uncertainty in C gw. This issue can affect the success of any reach mass-balance analysis, for age dating tracers or other solutes. To improve the likelihood of success in future applications of reach mass-balance, two new planning metrics are proposed for use, separately or together: the ratio of groundwater recharge rate (R) to stream density (D) within a watershed, and the long-term average Q gw/Q d in a stream reach (where Q d is stream discharge at the downstream end of the reach). In comparison to the Nebraska study site (R/D= 107 m2/year), more accurate estimation of C gw was achieved in a previous SF6 study in North Carolina (USA) with greater R/D (231 m2/year). Larger Q gw/Q d is associated with more accurate outcomes in reach mass-balance, and long-term average Q gw/Q d in stream reaches may be estimated by GIS analysis of watershed areas and/or stream lengths.
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影响因子:
2.4
作者:
R. Holtzman;U. Shavit;Michal Segal;I. Gavrieli;A. Marei;E. Farber;A. Vengosh
通讯作者:
A. Vengosh
影响因子:
5.4
作者:
D. Genereux;H. Hemond
通讯作者:
D. Genereux;H. Hemond
DOI:
10.1007/s00254-004-1061-9
发表时间:
2004-10-01
期刊:
ENVIRONMENTAL GEOLOGY
影响因子:
--
作者:
Katz, BG
通讯作者:
Katz, BG
影响因子:
5.4
作者:
C. Kennedy;D. Genereux;D. Corbett;H. Mitásová
通讯作者:
C. Kennedy;D. Genereux;D. Corbett;H. Mitásová
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
B. Kimball;R. Runkel;L. Gerner
通讯作者:
L. Gerner