Articles | Volume 26, issue 15
https://doi.org/10.5194/hess-26-4093-2022
https://doi.org/10.5194/hess-26-4093-2022
Research article
 | 
05 Aug 2022
Research article |  | 05 Aug 2022

Precipitation fate and transport in a Mediterranean catchment through models calibrated on plant and stream water isotope data

Matthias Sprenger, Pilar Llorens, Francesc Gallart, Paolo Benettin, Scott T. Allen, and Jérôme Latron

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Cited articles

Ala-aho, P., Tetzlaff, D., McNamara, J. P., Laudon, H., and Soulsby, C.: Using isotopes to constrain water flux and age estimates in snow-influenced catchments using the STARR (Spatially distributed Tracer-Aided Rainfall–Runoff) model, Hydrol. Earth Syst. Sci., 21, 5089–5110, https://doi.org/10.5194/hess-21-5089-2017, 2017. 
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. 
Asenjan, M. R. and Danesh-Yazdi, M.: The effect of seasonal variation in precipitation and evapotranspiration on the transient travel time distributions, Adv. Water Resour., 142, 103618, https://doi.org/10.1016/j.advwatres.2020.103618, 2020. 
Benettin, P. and Bertuzzo, E.: tran-SAS v1.0 (1.0), Zenodo [code], https://doi.org/10.5281/zenodo.1203600, 2018a. 
Benettin, P. and Bertuzzo, E.: tran-SAS v1.0: a numerical model to compute catchment-scale hydrologic transport using StorAge Selection functions, Geosci. Model Dev., 11, 1627–1639, https://doi.org/10.5194/gmd-11-1627-2018, 2018b. 
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Short summary
Our catchment-scale transit time modeling study shows that including stable isotope data on evapotranspiration in addition to the commonly used stream water isotopes helps constrain the model parametrization and reveals that the water taken up by plants has resided longer in the catchment storage than the water leaving the catchment as stream discharge. This finding is important for our understanding of how water is stored and released, which impacts the water availability for plants and humans.
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