Articles | Volume 23, issue 6
https://doi.org/10.5194/hess-23-2751-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-23-2751-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
28 Jun 2019
Research article |
| 28 Jun 2019
| 28 Jun 2019
Mechanisms of consistently disjunct soil water pools over (pore) space and time
Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Calle Jordi Girona, 18–26, 08034 Barcelona, Spain
Department of Forestry and Environmental Resources, North Carolina
State University, 2720 Faucette Dr, Raleigh, NC 27606, USA
Pilar Llorens
Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Calle Jordi Girona, 18–26, 08034 Barcelona, Spain
Carles Cayuela
Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Calle Jordi Girona, 18–26, 08034 Barcelona, Spain
Francesc Gallart
Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Calle Jordi Girona, 18–26, 08034 Barcelona, Spain
Jérôme Latron
Institute of Environmental Assessment and Water Research (IDAEA-CSIC), Calle Jordi Girona, 18–26, 08034 Barcelona, Spain
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This paper presents a new analytical concept to answer long-lasting questions of the cosmic-ray neutron sensing community, such as
what is the influence of a distant area or patches of different land use on the measurement signal?or
is the detector sensitive enough to detect a change of soil moisture (e.g. due to irrigation) in a remote field at a certain distance?The concept may support signal interpretation and sensor calibration, particularly in heterogeneous terrain.
Gerrit Huibert de Rooij
Hydrol. Earth Syst. Sci., 26, 5849–5858, https://doi.org/10.5194/hess-26-5849-2022, https://doi.org/10.5194/hess-26-5849-2022, 2022
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The way soils capture infiltrating water affects crops and natural vegetation as well as groundwater recharge. This retention of soil water is captured by a mathematical function that covers all water contents from very dry to water-saturated. Unfortunately, data in the dry range are often absent or unreliable. I modified an earlier function to be more robust in the absence of dry-range data, and present a computer program to estimate the parameters of the new function.
Nurit Goldberg-Yehuda, Shmuel Assouline, Yair Mau, and Uri Nachshon
Hydrol. Earth Syst. Sci., 26, 2499–2517, https://doi.org/10.5194/hess-26-2499-2022, https://doi.org/10.5194/hess-26-2499-2022, 2022
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In this work the interactions between soil compaction, evaporation, and salt accumulation at the vadose zone are discussed. Changes at the micro and macro scales of the soil physical and hydraulic properties were studied using high-resolution imagining techniques, alongside column experiments, aiming to characterize water flow and evaporation processes at natural, compacted, and tilled soil conditions. In addition, salt accumulation at the soil profile was examined for these setups.
Jiří Mls
Hydrol. Earth Syst. Sci., 26, 397–406, https://doi.org/10.5194/hess-26-397-2022, https://doi.org/10.5194/hess-26-397-2022, 2022
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In the paper the evaporation front is considered the interface that separates the wet part of a porous medium from its dry surroundings, and its exact definition in time and space is given. Subsequently, the law of the front's motion is derived. The general problem governing completely the front's motion is formulated and, for a special case, solved numerically. It is shown that the solution makes it possible to locate the rate of vaporization in time and space.
Isaac Kramer, Yuval Bayer, Taiwo Adeyemo, and Yair Mau
Hydrol. Earth Syst. Sci., 25, 1993–2008, https://doi.org/10.5194/hess-25-1993-2021, https://doi.org/10.5194/hess-25-1993-2021, 2021
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Salinity and sodicity can cause irreversible degradation to soil, threatening agricultural production and food security. To date, very little is known about the degree to which soil degradation can be reversible. We introduce a model for describing this partial reversibility (hysteresis) and lay out the experimental procedures necessary for characterizing the soil in this regard. We must shift our focus from degradation measurements to reversal measurements so that we can maintain healthy soils.
Peter F. Germann
Hydrol. Earth Syst. Sci., 25, 1097–1101, https://doi.org/10.5194/hess-25-1097-2021, https://doi.org/10.5194/hess-25-1097-2021, 2021
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This is the last paper submitted by Peter Germann before he died in December 2020. Peter reviews the development of capillary flow theory since the work of Briggs (1897) and Richards (1931), who raised capillary flow to a soil hydrological dogma. Attempts to correct the dogma led to concepts of non-equilibrium flow, macropore flow, and preferential flow during infiltration. Viscous film flow is proposed as an alternative approach to capillarity-driven flow during unsaturated infiltration.
Gerrit Huibert de Rooij, Juliane Mai, and Raneem Madi
Hydrol. Earth Syst. Sci., 25, 983–1007, https://doi.org/10.5194/hess-25-983-2021, https://doi.org/10.5194/hess-25-983-2021, 2021
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The way soils capture infiltrating water affects crops and natural vegetation and groundwater recharge. This retention of soil water is described by a mathematical function that covers all water contents from very dry to water saturated. We combined two existing lines of research to improve the behaviour of a popular function for very dry and very wet conditions. Our new function could handle a wider range of conditions than earlier curves. We provide fits to a wide range of soils.
William J. Massman
Hydrol. Earth Syst. Sci., 25, 685–709, https://doi.org/10.5194/hess-25-685-2021, https://doi.org/10.5194/hess-25-685-2021, 2021
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Increasing fire frequency and severity now poses a threat to most of the world's wildlands and forested ecosystems and their benefits. The HMV (Heat–Moisture–Vapor) model is a tool to manage fuels to help mitigate the consequences of fire and promote soil and vegetation recovery after fire. The model's performance is surprisingly good, but it also provides insights into the existence of previously unobserved feedbacks and other physical processes that occur during fire.
Joost Buitink, Anne M. Swank, Martine van der Ploeg, Naomi E. Smith, Harm-Jan F. Benninga, Frank van der Bolt, Coleen D. U. Carranza, Gerbrand Koren, Rogier van der Velde, and Adriaan J. Teuling
Hydrol. Earth Syst. Sci., 24, 6021–6031, https://doi.org/10.5194/hess-24-6021-2020, https://doi.org/10.5194/hess-24-6021-2020, 2020
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The amount of water stored in the soil is critical for the productivity of plants. Plant productivity is either limited by the available water or by the available energy. In this study, we infer this transition point by comparing local observations of water stored in the soil with satellite observations of vegetation productivity. We show that the transition point is not constant with soil depth, indicating that plants use water from deeper layers when the soil gets drier.
Stefano Barontini and Matteo Settura
Hydrol. Earth Syst. Sci., 24, 1907–1926, https://doi.org/10.5194/hess-24-1907-2020, https://doi.org/10.5194/hess-24-1907-2020, 2020
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More than 300 years after its first appearance, Perrault's De l'origine des fontaines provokes intriguing stimuli and suggestions. We discuss its epistemological relevance through the lens of the repeatability of the experiments, of the didactic aspects which arise for modern teaching of hydrology, and of the author's attitude in facing the complexity of the hydrological processes. The analysis shows that the birth of modern hydrology and the scientific revolution were closely entwined.
Erwin Zehe, Ralf Loritz, Conrad Jackisch, Martijn Westhoff, Axel Kleidon, Theresa Blume, Sibylle K. Hassler, and Hubert H. Savenije
Hydrol. Earth Syst. Sci., 23, 971–987, https://doi.org/10.5194/hess-23-971-2019, https://doi.org/10.5194/hess-23-971-2019, 2019
Kashif Mahmud, Gregoire Mariethoz, Andy Baker, and Pauline C. Treble
Hydrol. Earth Syst. Sci., 22, 977–988, https://doi.org/10.5194/hess-22-977-2018, https://doi.org/10.5194/hess-22-977-2018, 2018
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This study explores the relationship between drip water and rainfall in a SW Australian karst, where both intra- and interannual hydrological variations are strongly controlled by seasonal variations in recharge. The hydrological behavior of cave drips is examined at daily resolution with respect to mean discharge and the flow variation. We demonstrate that the analysis of the time series produced by cave drip loggers generates useful hydrogeological information that can be applied generally.
Matthias Sprenger, Doerthe Tetzlaff, and Chris Soulsby
Hydrol. Earth Syst. Sci., 21, 3839–3858, https://doi.org/10.5194/hess-21-3839-2017, https://doi.org/10.5194/hess-21-3839-2017, 2017
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We sampled the isotopic composition in the top 20 cm at four different sites in the Scottish Highlands at 5 cm intervals over 1 year. The relationship between the soil water isotopic fractionation and evapotranspiration showed a hysteresis pattern due to a lag response to onset and offset of the evaporative losses. The isotope data revealed that vegetation had a significant influence on the soil evaporation with evaporation being double from soils beneath Scots pine compared to heather.
Yonggang Yang and Bojie Fu
Hydrol. Earth Syst. Sci., 21, 1757–1767, https://doi.org/10.5194/hess-21-1757-2017, https://doi.org/10.5194/hess-21-1757-2017, 2017
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This paper investigates soil water migration processes in the Loess Plateau using isotopes. The soil water migration is dominated by piston-type flow, but rarely preferential flow. Soil water from the soil lay (20–40 cm) contributed to 6–12% of plant xylem water, while soil water at the depth of 40–60 cm is the largest component (range from 60 to 66 %), soil water below 60 cm depth contributed 8–14 % to plant xylem water, and only 5–8 % is derived from precipitation.
M. Levent Kavvas, Ali Ercan, and James Polsinelli
Hydrol. Earth Syst. Sci., 21, 1547–1557, https://doi.org/10.5194/hess-21-1547-2017, https://doi.org/10.5194/hess-21-1547-2017, 2017
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In this study dimensionally consistent governing equations of continuity and motion for transient soil water flow and water flux in fractional time and in fractional multiple space dimensions in anisotropic media are developed. By the introduction of the Brooks–Corey constitutive relationships, an explicit form of the equations is obtained. The developed governing equations, in their fractional time but integer space forms, show behavior consistent with the previous experimental observations.
Anke Hildebrandt, Axel Kleidon, and Marcel Bechmann
Hydrol. Earth Syst. Sci., 20, 3441–3454, https://doi.org/10.5194/hess-20-3441-2016, https://doi.org/10.5194/hess-20-3441-2016, 2016
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This theoretical paper describes the energy fluxes and dissipation along the flow paths involved in root water uptake, an approach that is rarely taken. We show that this provides useful additional insights for understanding the biotic and abiotic impediments to root water uptake. This approach shall be applied to explore efficient water uptake strategies and help locate the limiting processes in the complex soil–plant–atmosphere system.
D. Kurtzman, S. Baram, and O. Dahan
Hydrol. Earth Syst. Sci., 20, 1–12, https://doi.org/10.5194/hess-20-1-2016, https://doi.org/10.5194/hess-20-1-2016, 2016
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Vertisols are cracking clayey, arable soils that often overlay groundwater reservoirs. The soil cracks enable flow that bypasses soil blocks, which results in both relatively fresh recharge of the underlying groundwater and contamination with reactive contaminants. These special phenomena, as well as unique mechanism of salinization after cultivation and relative resilience to contamination by nitrate typical to groundwater under vertisols, are reviewed in this study.
A.-M. Kurth, C. Weber, and M. Schirmer
Hydrol. Earth Syst. Sci., 19, 2663–2672, https://doi.org/10.5194/hess-19-2663-2015, https://doi.org/10.5194/hess-19-2663-2015, 2015
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This study investigates the effects of river restoration on groundwater–surface water interactions in a losing urban stream. Investigations were performed using Distributed Temperature Sensing (DTS). The results indicate that the highest surface water downwelling occurred at the tip of a gravel island newly installed during river restoration, leading to the conclusion that in this specific setting, river restoration was effective in locally enhancing groundwater–surface water interactions.
F. Ries, J. Lange, S. Schmidt, H. Puhlmann, and M. Sauter
Hydrol. Earth Syst. Sci., 19, 1439–1456, https://doi.org/10.5194/hess-19-1439-2015, https://doi.org/10.5194/hess-19-1439-2015, 2015
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Soil moisture was observed along a strong semi-arid climatic gradient in a Mediterranean karst area. Soil moisture data and soil hydraulic modelling with Hydrus-1D revealed a strong dependency of percolation fluxes with rainfall amounts and intensity during heavy rainfall events. Spatial and temporal extrapolation of the model illustrated the high variability of seasonal percolation amounts among single years and showed strong correlations between soil depth and potential groundwater recharge.
M. Larsbo, J. Koestel, and N. Jarvis
Hydrol. Earth Syst. Sci., 18, 5255–5269, https://doi.org/10.5194/hess-18-5255-2014, https://doi.org/10.5194/hess-18-5255-2014, 2014
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The characteristics of the macropore network determine the potential for fast transport of solutes through soil. Such characteristics computed from 3-dimensional X-ray tomography images were combined with measured solute breakthrough curves and near-saturated hydraulic conductivities. At a given flow rate, smaller macroporosities, poorer local connectivity of the macropore network and smaller near-saturated hydraulic conductivities resulted in a greater degree of preferential transport.
M. Temesgen, S. Uhlenbrook, B. Simane, P. van der Zaag, Y. Mohamed, J. Wenninger, and H. H. G. Savenije
Hydrol. Earth Syst. Sci., 16, 4725–4735, https://doi.org/10.5194/hess-16-4725-2012, https://doi.org/10.5194/hess-16-4725-2012, 2012
G. H. de Rooij
Hydrol. Earth Syst. Sci., 15, 1601–1614, https://doi.org/10.5194/hess-15-1601-2011, https://doi.org/10.5194/hess-15-1601-2011, 2011
Cited articles
Allen, S. T., Kirchner, J. W., Braun, S., Siegwolf, R. T. W., and Goldsmith,
G. R.: Seasonal origins of soil water used by trees, Hydrol. Earth Syst.
Sci., 23, 1199–1210, https://doi.org/10.5194/hess-23-1199-2019, 2019.
Asano, Y., Compton, J. E., and Church, M. R.: Hydrologic flowpaths influence
inorganic and organic nutrient leaching in a forest soil, Biogeochemistry,
81, 191–204, https://doi.org/10.1007/s10533-006-9036-4, 2006.
Benettin, P., Queloz, P., Bensimon, M., McDonnell, J. J., and Rinaldo, A.:
Velocities, residence times, tracer breakthroughs in a vegetated lysimeter:
a multitracer experiment, Water Resour. Res., 55, 21–33,
https://doi.org/10.1029/2018WR023894, 2019.
Berry, Z. C., Evaristo, J., Moore, G., Poca, M., Steppe, K., Verrot, L.,
Asbjornsen, H., Borma, L. S., Bretfeld, M., Hervé-Fernández, P.,
Seyfried, M., Schwendenmann, L., Sinacore, K., de Wispelaere, L., and
McDonnell, J.: The two water worlds hypothesis: Addressing multiple working
hypotheses and proposing a way forward, Ecohydrology, 11, e1843,
https://doi.org/10.1002/eco.1843, 2017.
Beven, K. and Germann, P.: Macropores and water flow in soils, Water Resour.
Res., 18, 1311–1325, https://doi.org/10.1029/WR018i005p01311, 1982.
Beven, K. and Germann, P.: Macropores and water flow in soils revisited,
Water Resour. Res., 49, 3071–3092, https://doi.org/10.1002/wrcr.20156, 2013.
Brantley, S. L., Eissenstat, D. M., Marshall, J. A., Godsey, S. E.,
Balogh-Brunstad, Z., Karwan, D. L., Papuga, S. A., Roering, J., Dawson, T.
E., Evaristo, J., Chadwick, O., McDonnell, J. J., and Weathers, K. C.:
Reviews and syntheses: On the roles trees play in building and plumbing the
critical zone, Biogeosciences, 14, 5115–5142, https://doi.org/10.5194/bg-14-5115-2017,
2017.
Brooks, J. R., Barnard, H. R., Coulombe, R., and McDonnell, J. J.:
Ecohydrologic separation of water between trees and streams in a
Mediterranean climate, Nat. Geosci., 3, 100–104, https://doi.org/10.1038/NGEO722, 2010.
Cain, M. R., Ward, A. S., and Hrachowitz, M.: Ecohydrologic separation
alters interpreted hydrologic stores and fluxes in a headwater mountain
catchment, Hydrol. Process., https://doi.org/10.1002/hyp.13518, in press, 2019.
Casellas, E., Latron, J., Cayuela, C., Bech, J., Udina, M., Sola, Y., Lee, K.-O., and Llorens, P.: Moisture origin and characteristics of the isotopic signature of rainfall in a Mediterranean mountain catchment (Vallcebre, eastern Pyrenees), J. Hydrol., 575, 767–779, 2019.
Cayuela, C., Llorens, P., Sánchez-Costa, E., and Latron, J.:
Modification of the isotopic composition of rainfall by throughfall and
stemflow: The case of Scots pine and downy oak forests under Mediterranean
conditions, Ecohydrology, 7, e2025, https://doi.org/10.1002/eco.2025, 2018a.
Cayuela, C., Llorens, P., Sánchez-Costa, E., Levia, D. F., and Latron,
J.: Effect of biotic and abiotic factors on inter and intra-event
variability in stemflow rates in oak and pine stands in a Mediterranean
mountain area, J. Hydrol., 560, 396–406, https://doi.org/10.1016/j.jhydrol.2018.03.050, 2018b.
Coplen, T. B.: Guidelines and recommended terms for expression of
stable-isotope-ratio and gas-ratio measurement results, Rapid Commun. Mass
Spectrom., 25, 2538–2560, https://doi.org/10.1002/rcm.5129, 2011.
Craig, H.: Isotopic variations in meteoric waters, Science, 133, 1702–1703,
https://doi.org/10.1126/science.133.3465.1702, 1961.
Dubbert, M. and Werner, C.: Water fluxes mediated by vegetation: emerging
isotopic insights at the soil and atmosphere interfaces, New Phytol., 221,
1754–1763, https://doi.org/10.1111/nph.15547, 2019.
Dubbert, M., Caldeira, M. C., Dubbert, D., and Werner, C.: A pool-weighted
perspective on the two-water-worlds hypothesis, New Phytol., 222,
1271–1283, https://doi.org/10.1111/nph.15670, 2019.
Evaristo, J., Kim, M., Haren, J., Pangle, L. A., Harman, C. J., Troch, P.
A., and McDonnell, J. J.: Characterizing the fluxes and age distribution of
soil water, plant water, and deep percolation in a model tropical ecosystem,
Water Resour. Res., 55, 3307–3327, https://doi.org/10.1029/2018WR023265, 2019.
Fenicia, F., Wrede, S., Kavetski, D., Pfister, L., Hoffmann, L., Savenije,
H. H. G., and McDonnell, J. J.: Assessing the impact of mixing assumptions
on the estimation of streamwater mean residence time, Hydrol. Process., 24,
1730–1741, https://doi.org/10.1002/Hyp.7595, 2010.
Gallart, F., Llorens, P., Latron, J., and Regüés, D.: Hydrological
processes and their seasonal controls in a small Mediterranean mountain
catchment in the Pyrenees, Hydrol. Earth Syst. Sci., 6, 527–537,
https://doi.org/10.5194/hess-6-527-2002, 2002.
Geris, J., Tetzlaff, D., McDonnell, J., Anderson, J., Paton, G., and
Soulsby, C.: Ecohydrological separation in wet, low energy northern
environments? A preliminary assessment using different soil water extraction
techniques, Hydrol. Process., 29, 5139–5152, https://doi.org/10.1002/hyp.10603, 2015.
Gerke, H. H. and van Genuchten, M. T.: A dual-porosity model for simulating
the preferential movement of water and solutes in structured porous media,
Water Resour. Res., 29, 305–319, https://doi.org/10.1029/92WR02339, 1993.
Gessler, A., Ferrio, J. P., Hommel, R., Treydte, K., Werner, R. A., and
Monson, R. K.: Stable isotopes in tree rings: Towards a mechanistic
understanding of isotope fractionation and mixing processes from the leaves
to the wood, Tree Physiol., 34, 796–818, https://doi.org/10.1093/treephys/tpu040, 2014.
Gierke, C., Newton, B. T., and Phillips, F. M.: Soil-water dynamics and tree
water uptake in the Sacramento Mountains of New Mexico (USA): A stable
isotope study, Hydrogeol. J., 24, 805–818, https://doi.org/10.1007/s10040-016-1403-1,
2016.
Goldsmith, G. R., Muñoz-Villers, L. E., Holwerda, F., McDonnell, J. J.,
Asbjornsen, H., and Dawson, T. E.: Stable isotopes reveal linkages among
ecohydrological processes in a seasonally dry tropical montane cloud forest,
Ecohydrology, 5, 779–790, https://doi.org/10.1002/eco.268, 2012.
Good, S. P., Noone, D., and Bowen, G.: Hydrologic connectivity constrains
partitioning of global terrestrial water fluxes, Science, 349, 175–177,
https://doi.org/10.1126/science.aaa5931, 2015.
Haese, B., Werner, M., and Lohmann, G.: Stable water isotopes in the coupled
atmosphere–land surface model ECHAM5-JSBACH, Geosci. Model Dev., 6,
1463–1480, https://doi.org/10.5194/gmd-6-1463-2013, 2013.
Hervé-Fernández, P., Oyarzún, C., Brumbt, C., Huygens, D.,
Bodé, S., Verhoest, N. E. C., and Boeckx, P.: Assessing the “two water
worlds” hypothesis and water sources for native and exotic evergreen
species in south-central Chile, Hydrol. Process., 30, 4227–4241,
https://doi.org/10.1002/hyp.10984, 2016.
Hewlett, J. D. and Hibbert, A. R.: Factors affecting the response of small
watersheds to precipitation in humid areas, Forest Hydrol., 275–290, 1967.
Hrachowitz, M., Savenije, H., Bogaard, T. A., Tetzlaff, D., and Soulsby, C.:
What can flux tracking teach us about water age distribution patterns and
their temporal dynamics?, Hydrol. Earth Syst. Sci., 17, 533–564,
https://doi.org/10.5194/hess-17-533-2013, 2013.
IAEA/WMO: Global Network of Isotopes in Precipitation: The GNIP Database, available at: https://www.iaea.org/services/networks/gnip, last access: 8 February 2019.
Klaus, J. and McDonnell, J. J.: Hydrograph separation using stable isotopes:
Review and evaluation, J. Hydrol., 505, 47–64,
https://doi.org/10.1016/j.jhydrol.2013.09.006, 2013.
Knighton, J., Saia, S. M., Morris, C. K., Archiblad, J. A., and Walter, M.
T.: Ecohydrologic Considerations for Modeling of Stable Water Isotopes in a
Small Intermittent Watershed, Hydrol. Process., 31, 2438–2452,
https://doi.org/10.1002/hyp.11194, 2017.
Koeniger, P., Gaj, M., Beyer, M., and Himmelsbach, T.: Review on soil water
isotope based groundwater recharge estimations, Hydrol. Process., 30,
2817–2834, https://doi.org/10.1002/hyp.10775, 2016.
Landwehr, J. M. and Coplen, T. B.: Line-conditioned excess: a new method for
characterizing stable hydrogen and oxygen isotope ratios in hydrologic
systems, in: International Conference on Isotopes in Environmental Studies,
Aquatic Forum, Monte-Carlo, Monaco, 25–29 October 2004, IAEA, Vienna,
132–135, 2006.
Latron, J., Llorens, P., and Gallart, F.: The Hydrology of Mediterranean
Mountain Areas, Geogr. Compass, 3, 2045–2064,
https://doi.org/10.1111/j.1749-8198.2009.00287.x, 2009.
Li, Z., Jasechko, S., and Si, B.: Uncertainties in tritium mass balance
models for groundwater recharge estimation, J. Hydrol., 571, 150–158,
https://doi.org/10.1016/j.jhydrol.2019.01.030, 2019.
Llorens, P., Gallart, F., Cayuela, C., Roig-Planasdemunt, M., Casellas, E.,
Molina, A. J., Moreno de las Heras, M., Bertran, G., Sánchez-Costa, E.,
and Latron, J.: What have we learnt about mediterranean catchment hydrology?
30 years observing hydrological processes in the Vallcebre research
catchments, Geogr. Res. Lett., 44, 475–502, https://doi.org/10.18172/cig.3432, 2018.
Martín-Gómez, P., Barbeta, A., Voltas, J., Peñuelas, J.,
Dennis, K., Palacio, S., Dawson, T. E., and Ferrio, J. P.: Isotope-ratio
infrared spectroscopy: a reliable tool for the investigation of plant-water
sources?, New Phytol., 207, 914–927, https://doi.org/10.1111/nph.13376, 2015.
McDonnell, J. J.: The two water worlds hypothesis: ecohydrological
separation of water between streams and trees?, WIREs Water, 1, 323–329,
https://doi.org/10.1002/wat2.1027, 2014.
McMillan, H., Tetzlaff, D., Clark, M., and Soulsby, C.: Do time-variable
tracers aid the evaluation of hydrological model structure? A multimodel
approach, Water Resour. Res., 48, W05501, https://doi.org/10.1029/2011WR011688, 2012.
Molina, A. J., Llorens, P., Garcia-Estringana, P., Moreno de las Heras, M.,
Cayuela, C., Gallart, F., and Latron, J.: Contributions of throughfall,
forest and soil characteristics to near-surface soil water-content
variability at the plot scale in a mountainous Mediterranean area, Sci.
Total Environ., 647, 1421–1432, https://doi.org/10.1016/j.scitotenv.2018.08.020, 2019.
Oerter, E. and Bowen, G.: In situ monitoring of H and O stable isotopes in
soil water reveals ecohydrologic dynamics in managed soil systems,
Ecohydrology, 10, e1841, https://doi.org/10.1002/eco.1841, 2017.
Orlowski, N., Pratt, D. L., and McDonnell, J. J.: Intercomparison of soil
pore water extraction methods for stable isotope analysis, Hydrol. Process.,
30, 3434–3449, https://doi.org/10.1002/hyp.10870, 2016.
Schaap, M. G., Leij, F. J., and van Genuchten, M. T.: ROSETTA: a computer
program for estimating soil hydraulic parameters with hierarchical
pedotransfer functions, J. Hydrol., 251, 163–176,
https://doi.org/10.1016/S0022-1694(01)00466-8, 2001.
Schjonning, P.: Size Distribution of Dispersed and Aggregated Particles and
of Soil Pores in 12 Danish Soils, Acta Agriculturae Scandinavica, Section B
– Soil & Plant Science, 42, 26–33, https://doi.org/10.1080/09064719209410196, 1992.
Sprenger, M., Herbstritt, B., and Weiler, M.: Established methods and new
opportunities for pore water stable isotope analysis, Hydrol. Process., 29,
5174–5192, https://doi.org/10.1002/hyp.10643, 2015.
Sprenger, M., Erhardt, M., Riedel, M., and Weiler, M.: Historical tracking
of nitrate in contrasting vineyards using water isotopes and nitrate depth
profiles, Agr. Ecosyst. Environ., 222, 185–192,
https://doi.org/10.1016/j.agee.2016.02.014, 2016a.
Sprenger, M., Leistert, H., Gimbel, K., and Weiler, M.: Illuminating
hydrological processes at the soil-vegetation-atmosphere interface with
water stable isotopes, Rev. Geophys., 54, 674–704,
https://doi.org/10.1002/2015RG000515, 2016b.
Sprenger, M., Tetzlaff, D., Buttle, J., Laudon, H., and Soulsby, C.: Water
ages in the critical zone of long-term experimental sites in northern
latitudes, Hydrol. Earth Syst. Sci., 22, 3965–3981,
https://doi.org/10.5194/hess-22-3965-2018, 2018a.
Sprenger, M., Tetzlaff, D., Buttle, J. M., Laudon, H., Leistert, H.,
Mitchell, C. P. J., Snelgrove, J., Weiler, M., and Soulsby, C.: Measuring
and modelling stable isotopes of mobile and bulk soil water, Vadose Zone J.,
17, 170149, https://doi.org/10.2136/VZJ2017.08.0149, 2018b.
Sprenger, M., Stumpp, C., Weiler, M., Aeschbach, W., Allen, S. T., Benettin,
P., Dubbert, M., Hartmann, A., Hrachowitz, M., Kirchner, J. W., McDonnell,
J. J., Orlowski, N., Penna, D., Pfahl, S., Rinderer, M., Rodriguez, N. B.,
Schmidt, M., and Werner, C.: The demographics of water: A review of water
ages in the critical zone, Rev. Geophys., https://doi.org/10.1029/2018RG000633, in press, 2019.
Stumpp, C. and Maloszewski, P.: Quantification of preferential flow and flow
heterogeneities in an unsaturated soil planted with different crops using
the environmental isotope δ18O, J. Hydrol., 394, 407–415,
https://doi.org/10.1016/j.jhydrol.2010.09.014, 2010.
Stumpp, C., Maloszewski, P., Stichler, W., and Maciejewski, S.:
Quantification of the heterogeneity of the unsaturated zone based on
environmental deuterium observed in lysimeter experiments, Hydrolog. Sci. J., 52, 748–762, https://doi.org/10.1623/hysj.52.4.748, 2007.
Tsuruta, K., Yamamoto, H., Katsuyama, M., Kosugi, Y., Okumura, M., and
Matsuo, N.: Effects of cryogenic vacuum distillation on the stable isotope
ratios of soil water, Hydrol. Res. Lett., 13, 1–6, https://doi.org/10.3178/hrl.13.1,
2019.
van Genuchten, M. T.: A closed-form equation for predicting the hydraulic
conductivity of unsaturated soils, Soil Sci. Soc. Am. J., 44, 892–898,
1980.
Wang, L., Caylor, K. K., Villegas, J. C., Barron-Gafford, G. A., Breshears,
D. D., and Huxman, T. E.: Partitioning evapotranspiration across gradients
of woody plant cover: Assessment of a stable isotope technique, Geophys.
Res. Lett., 37, L09401, https://doi.org/10.1029/2010GL043228, 2010.
Short summary
We find that the stable isotopic compositions of mobile and matrix bound soil water are continuously different over 8 months. Long-term data further show that these isotopic differences result from the refilling of small soil pores by isotopically depleted rains during low soil moisture conditions. Thus, subsurface water is not well mixed, but flow velocities and storage in soils are highly variable; this has important implications for ecohydrological studies and soil hydrological modeling.
We find that the stable isotopic compositions of mobile and matrix bound soil water are...
