The age of groundwater – Definitions, models and why we do not need this term

Suckow, Axel

doi:10.1016/j.apgeochem.2014.04.016

Cited by 135 publications

(108 citation statements)

References 45 publications

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“…However, one must keep in mind that the RTD reflects only the time spent in the system under consideration. For unconfined aquifers, the inflow occurs at the water (Suckow, 2014). Under those conditions, RTD models of unconfined aquifers can be used to interpret environmental tracer data (Małoszewski and Zuber, 1982).…”

Section: Steady-state Analytical Rtdsmentioning

confidence: 99%

“…Therefore, the use of RTD models of semi-confined aquifers may encounter practical limitations. Also note that accordingly, groundwater residence time is classically defined as the time spent by the water in the subsurface after it reaches the water table (Suckow, 2014), i.e. the concept of groundwater residence time implies the consideration of unconfined conditions.…”

Section: Steady-state Analytical Rtdsmentioning

confidence: 99%

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Residence time distributions for hydrologic systems: Mechanistic foundations and steady-state analytical solutions

Leray

Engdahl

Massoudieh

et al. 2016

Journal of Hydrology

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Steady-state analytical RTDs contaminant transport, and ecosystem preservation. Analytical solutions are often adopted as a model of the RTD and a broad spectrum of models from many disciplines has been applied. Although these solutions are typically reduced in dimensionality and limited in complexity, their ease of use makes them preferred tools, specifically for the interpretation of tracer data. Our review begins with the mechanistic basis for the governing equations, highlighting the physics for generating a RTD, and a catalog of analytical solutions follows. This catalog explains the geometry, boundary conditions and physical aspects of the hydrologic systems, as well as the sampling conditions, that altogether give rise to specific RTDs. The similarities between models are noted, as are the appropriate conditions for their applicability. The presentation of simple solutions is followed by a presentation of more complicated analytical models for RTDs, including serial and parallel combinations, lagged systems, and non-Fickian models. The conditions for the appropriate use of analytical solutions are discussed, and we close with some thoughts on potential applications, alternative approaches, and future directions for modeling hydrologic residence time.

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Section: Steady-state Analytical Rtdsmentioning

confidence: 99%

Section: Steady-state Analytical Rtdsmentioning

confidence: 99%

Residence time distributions for hydrologic systems: Mechanistic foundations and steady-state analytical solutions

Leray

Engdahl

Massoudieh

et al. 2016

Journal of Hydrology

View full text Add to dashboard Cite

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“…The calculation is performed considering the time difference a water parcel needs to travel between two sampling points (Suckow, 2014;Torgersen et al, 2013). For the LA, the calculation performed between B11 and B8 gives a value about 2.1 10 -6 m/s, slightly lower than the geophysics estimations.…”

Section: Aquifer Hydraulic Conductivity Estimations and Residence Timmentioning

confidence: 99%

“…The residence time of groundwater is a fundamental parameter for the understanding of hydrogeosystems functioning (McCallum et al, 2014;Suckow, 2014). Indeed, the groundwater residence time documents on contaminant transport and sustainability of water resources (Baudron et al, 2014;Cook et al, 1995;Cook and Herczeg, 2000;Gourcy et al, 2009;Murgulet et al, 2016;Vautour et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…However a sample taken at a given location is often a mixture of waters that have been transported via various flow paths. Thus this residence time should be mostly interpreted as a weighted mean of idealized residence times (Bethke and Johnson, 2008;Goode, 1996;Jodar et al, 2014;Suckow, 2014;Torgersen et al, 2013;Turnadge and Smerdon, 2014). The major advantage of CFCs and SF 6 resides in the possibility to discriminate different water bodies considering various mixing models (piston flow, binary or exponential), providing information on aquifer functioning (Cook et al, 1995;Jodar et al, 2014;Kashiwaya et al, 2014;Zuber et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

Santoni

Huneau

Garel

et al. 2016

Journal of Hydrology

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Groundwater recharge and age‐depth profiles of intensively exploited groundwater resources in northwest India

Lapworth

MacDonald

Krishan

et al. 2015

Geophysical Research Letters

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Intensive irrigation in northwest India has led to growing concerns over the sustainability of current and future groundwater abstraction. Environmental tracers and measurements of groundwater residence times can help quantify the renewal processes. Results from 16 paired locations show the interquartile ranges for residence times in shallow alluvial groundwater (8-50 m deep) to be 1-50 years and significantly less than those from deeper groundwater (76-160 m deep) at 40-170 years. The widespread occurrence of modern tracers in deep groundwater (>60% of sites had >10% modern recharge) suggests that there is low regional aquifer anisotropy and that deep aquifers are recharged by a significant component of recent recharge via vertical leakage. Stable isotope and noble gas results at all depths conform to modern meteoric sources and annual average temperatures, with no evidence of significant regional recharge from canal leakage in this study area close to the Himalayas.

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The age of groundwater – Definitions, models and why we do not need this term

Cited by 135 publications

References 45 publications

Residence time distributions for hydrologic systems: Mechanistic foundations and steady-state analytical solutions

Residence time distributions for hydrologic systems: Mechanistic foundations and steady-state analytical solutions

Residence time, mineralization processes and groundwater origin within a carbonate coastal aquifer with a thick unsaturated zone

Groundwater recharge and age‐depth profiles of intensively exploited groundwater resources in northwest India

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