Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026386 |
Stable and Radioisotope Systematics Reveal Fossil Water as Fundamental Characteristic of Arid Orogenic-Scale Groundwater Systems | |
Moran, Brendan J.1; Boutt, David F.1; Munk, Lee Ann2 | |
2019-12-28 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:12页码:11295-11315 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In arid and semiarid regions, persistent hydrological imbalances illuminate the considerable gaps in our spatiotemporal understanding of fundamental catchment-scale governing mechanisms. The Salar de Atacama basin is the most extreme example of groundwater-dominated continental basins and therefore is an ideal place to probe these unresolved questions. Geochemical and hydrophysical observations indicate that groundwaters discharging into the basin reflect a large regional system integrated over 10(2)-10(4) year timescales. The groundwater here, as in other arid regions, is a critical freshwater resource subject to substantial demand from competing interests, particularly as development of its world-class lithium brine deposit expands. Utilizing a uniquely large and comprehensive set of H and O isotopes in water, we demonstrate that much of the presumed recharge area on the Altiplano-Puna plateau exhibits isotopic signatures quite distinct from waters presently discharging within the endorheic Salar de Atacama watershed. delta O-18 values of predicted inflow source waters are 3.6 parts per thousand to 5.6 parts per thousand higher than modern plateau waters, and H-3 data from 87 discrete samples indicate that nearly all of this inflow is composed of premodern recharge (i.e., fossil water). Under plausible conditions, these distinctions cannot be explained solely by natural variability in modern meteoric inputs or by steady state groundwater flow. We present a conceptual model revealing the extensive influence of transient draining of fossil groundwater storage augmented by regional interbasin flow from the Andes. Our analysis provides robust constraints on fundamental mechanisms governing this arid continental groundwater system and a framework within which to address persistent uncertainties in similar systems worldwide. |
英文关键词 | Salar de Atacama Chile paleorecharge tritium Altiplano-Puna plateau regional groundwater flow |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000504592700001 |
WOS关键词 | SALAR-DE-ATACAMA ; NORTHERN CHILE ; CLIMATE-CHANGE ; CLOSED-BASIN ; LAKE-SEDIMENTS ; CENTRAL ANDES ; ALLUVIAL-FAN ; RECHARGE ; DESERT ; ALTIPLANO |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/224007 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Massachusetts, Dept Geosci, Amherst, MA 01003 USA; 2.Univ Alaska Anchorage, Dept Geol Sci, Anchorage, AK USA |
推荐引用方式 GB/T 7714 | Moran, Brendan J.,Boutt, David F.,Munk, Lee Ann. Stable and Radioisotope Systematics Reveal Fossil Water as Fundamental Characteristic of Arid Orogenic-Scale Groundwater Systems[J]. WATER RESOURCES RESEARCH,2019,55(12):11295-11315. |
APA | Moran, Brendan J.,Boutt, David F.,&Munk, Lee Ann.(2019).Stable and Radioisotope Systematics Reveal Fossil Water as Fundamental Characteristic of Arid Orogenic-Scale Groundwater Systems.WATER RESOURCES RESEARCH,55(12),11295-11315. |
MLA | Moran, Brendan J.,et al."Stable and Radioisotope Systematics Reveal Fossil Water as Fundamental Characteristic of Arid Orogenic-Scale Groundwater Systems".WATER RESOURCES RESEARCH 55.12(2019):11295-11315. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论