Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027743 |
A mountain‐front recharge component characterization approach combining groundwater age distributions, noble gas thermometry, and fluid and energy transport modeling | |
Katherine H. Markovich; Laura E. Condon; Kenneth C. Carroll; Roland Purtschert; Jennifer C. McIntosh | |
2020-12-11 | |
发表期刊 | Water Resources Research
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出版年 | 2020 |
英文摘要 | Mountain‐front recharge (MFR), or all inflow to a basin‐fill aquifer with its source in the mountain block, is an important component of recharge to basin‐fill aquifer systems. Distinguishing and quantifying the surface from subsurface components of MFR is necessary for water resource planning and management, particularly as climate change may impact these components in distinct ways. This study tests the hypothesis that MFR components can be distinguished in long‐screened, basin‐fill production wells by 1) groundwater age and 2) the median elevation of recharge. We developed a MFR characterization approach by combining age distributions in six wells using tritium, krypton‐85, argon‐39, and radiocarbon, and median recharge elevations from noble gas thermometry combined with numerical experiments to determine recharge temperature lapse rates using flow and energy transport modeling. We found that groundwater age distributions provided valuable information for characterizing the dominant flow system behavior captured by the basin‐fill production wells. Tracers indicated the presence of old (i.e., no detectable tritium) water in a well completed in weathered bedrock located close to the mountain front. Two production wells exhibited age distributions of binary mixing between modern and a small fraction of old water, whereas the remaining wells captured predominantly modern flowpaths. Noble gas thermometry provided important complementary information to the age distributions, however assuming constant recharge temperature lapse rates produced improbable recharge elevations. Numerical experiments suggest that surface MFR, if derived from snowmelt, can locally suppress water table temperatures in the basin‐fill aquifer, with implications for recharge elevations estimated from noble gas thermometry. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308240 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Katherine H. Markovich,Laura E. Condon,Kenneth C. Carroll,等. A mountain‐front recharge component characterization approach combining groundwater age distributions, noble gas thermometry, and fluid and energy transport modeling[J]. Water Resources Research,2020. |
APA | Katherine H. Markovich,Laura E. Condon,Kenneth C. Carroll,Roland Purtschert,&Jennifer C. McIntosh.(2020).A mountain‐front recharge component characterization approach combining groundwater age distributions, noble gas thermometry, and fluid and energy transport modeling.Water Resources Research. |
MLA | Katherine H. Markovich,et al."A mountain‐front recharge component characterization approach combining groundwater age distributions, noble gas thermometry, and fluid and energy transport modeling".Water Resources Research (2020). |
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