Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026913 |
Repeated subsurface thermal profiling to reveal temporal variability in deep groundwater flow conditions | |
V.F. Bense; B.L. Kurylyk; J.G.H. de Bruin; P. Visser | |
2020-04-17 | |
发表期刊 | Water Resources Research
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出版年 | 2020 |
英文摘要 | Reliably quantifying groundwater fluxes to and from confined aquifers in sedimentary basins is increasingly recognized as a critical challenge that impedes sustainable groundwater management. One approach to quantify such fluxes is through the analysis of deep (e.g., >50 m) borehole thermal profiles penetrating through aquifer‐aquitard systems. Recently developed methods to interpret such data exploit the relationship between vertical groundwater flow and the downward propagation of surface temperature disturbances resulting from climate warming. In this note, we advance beyond prior studies that assumed steady‐state groundwater flow by demonstrating how hydrogeological regime shifts on decadal time scales can be quantitatively inferred from temperature‐depth profiles. We use a set of repeated temperature‐depth profiles from one site in an unconsolidated sedimentary aquifer system, recorded in 1980 and 2016/2018 to tentatively infer a minimum of a threefold increase in groundwater downwelling to deeper aquifers (ie, from 100 mm/y to 350 mm/y). The enhanced flux likely results from intensified, deep groundwater abstraction in the vicinity since the mid 1980s. We reach this conclusion through analyzing the occurrence and downward propagation of the minimum temperature in the profiles as well as the temporal stability of deeper groundwater temperatures. We conclude that repeated temperature‐depth profiles can be suitable to archive hydrogeological changes. Our results provide the impetus for more systematic collection of present‐day temperature‐depth profiles to provide a historical benchmark from which to assess future groundwater flow alterations, especially in areas that lack traditional aquifer monitoring via hydraulic head measurements. |
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/249202 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | V.F. Bense,B.L. Kurylyk,J.G.H. de Bruin,et al. Repeated subsurface thermal profiling to reveal temporal variability in deep groundwater flow conditions[J]. Water Resources Research,2020. |
APA | V.F. Bense,B.L. Kurylyk,J.G.H. de Bruin,&P. Visser.(2020).Repeated subsurface thermal profiling to reveal temporal variability in deep groundwater flow conditions.Water Resources Research. |
MLA | V.F. Bense,et al."Repeated subsurface thermal profiling to reveal temporal variability in deep groundwater flow conditions".Water Resources Research (2020). |
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