Articles | Volume 25, issue 4
Hydrol. Earth Syst. Sci., 25, 2239–2259, 2021
https://doi.org/10.5194/hess-25-2239-2021

Special issue: Water, isotope and solute fluxes in the soil–plant–atmosphere...

Hydrol. Earth Syst. Sci., 25, 2239–2259, 2021
https://doi.org/10.5194/hess-25-2239-2021
Research article
26 Apr 2021
Research article | 26 Apr 2021

Quantifying the effects of land use and model scale on water partitioning and water ages using tracer-aided ecohydrological models

Aaron Smith et al.

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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. 
Asbjornsen, H., Goldsmith, G. R., Alvarado-Barrientos, M. S., Rebel, K., Van Osch, F. P., Rietkerk, M., Chen, J., Gotsch, S., Tobon, C., Geissert, D. R., Gomez-Tagle, A., Vache, K., and Dawson, T. E.: Ecohydrological advances and applications in plant-water relations research: a review, J. Plant Ecol., 4, 3–22, https://doi.org/10.1093/jpe/rtr005, 2011. 
Bhaskar, A. S., Welty, C., Maxwell, R. M., and Miller, A. J.: Untangling the effects of urban development on subsurface storage in Baltimore, Water Resour. Res., 51, 1158–1181, https://doi.org/10.1002/2014wr016039, 2015. 
Birkel, C., Soulsby, C., and Tetzlaff, D.: Modelling catchment-scale water storage dynamics: reconciling dynamic storage with tracer-inferred passive storage, Hydrol. Process., 25, 3924–3936, https://doi.org/10.1002/hyp.8201, 2011. 
Bizhanimanzar, M., Leconte, R., and Nuth, M.: Catchment-Scale Integrated Surface Water-Groundwater Hydrologic Modelling Using Conceptual and Physically Based Models: A Model Comparison Study, Water, 12, 363, https://doi.org/10.3390/w12020363, 2020. 
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Short summary
We used a tracer-aided ecohydrological model on a mixed land use catchment in northeastern Germany to quantify water flux–storage–age interactions at four model grid resolutions. The model's ability to reproduce spatio-temporal flux–storage–age interactions decreases with increasing model grid sizes. Similarly, larger model grids showed vegetation-influenced changes in blue and green water partitioning. Simulations reveal the value of measured soil and stream isotopes for model calibration.