Constraining stream water source dynamics in a high-latitude catchment using tracer-aided modeling
- 1SMHI (Swedish Meteorological and Hydrological Institute), Hydrological Research Unit, Sweden (andrea.popp@smhi.se)
- 2Department of Forest Ecology and Management, SLU, Sweden
- 3Department of Earth Sciences, Uppsala University, Sweden
- 4Department of Geography, University of Calgary, Canada
Standard hydrologic model calibration and evaluation primarily rely on streamflow observations, which can hinder an accurate representation of physical processes generating streamflow. Recent studies demonstrate that using tracers such as stable water isotope data in addition to flow observations in model calibration considerably reduces parameter uncertainty and constrains stream water source dynamics (e.g., He et al., 2019; Popp et al., 2021; Stadnyk and Holmes, 2023). In this study, we demonstrate the capabilities of an isotope-aided HYPE model (Lindström et al., 2010) in the Krycklan Catchment Study in Sweden. To this end, we integrated the isoWATFLOOD model's isotope routine (https://github.com/h2obabyts/isoWATFLOOD) into the HYPE model and incorporated extensive time series of stable water isotope data collected from different water sources including precipitation, snow, and groundwater and stream water. Our goal is to deepen the process understanding of snow-dominated catchments undergoing rapid changes due to global warming.
References
He, Z., Unger-Shayesteh, K., Vorogushyn, S., Weise, S. M., Kalashnikova, O., Gafurov, A., Duethmann, D., Barandun, M., and Merz, B. (2019. Constraining hydrological model parameters using water isotopic compositions in a glacierized basin, Central Asia, Journal of Hydrology, 571, 332–348, https://doi.org/ 10.1016/j.jhydrol.2019.01.048.
Lindström, G., Pers, C., Rosberg, J., Strömqvist, J. and Arheimer, B. (2010). Development and testing of the HYPE (Hydrological Predictions for the Environment) water quality model for different spatial scales. Hydrology Research 41.3–4, 295-319.
Popp, A. L., Pardo‐Álvarez, Á., Schilling, O. S., Scheidegger, A., Musy, S., Peel, M., ... & Kipfer, R. (2021). A framework for untangling transient groundwater mixing and travel times. Water Resources Research, 57(4), e2020WR028362.
Stadnyk, T. A., & Holmes, T. L. (2023). Large scale hydrologic and tracer aided modelling: A review. Journal of Hydrology, 129177.
How to cite: Popp, A., Gustafsson, D., Laudon, H., Pers, C., Fischer, B., and Stadnyk, T.: Constraining stream water source dynamics in a high-latitude catchment using tracer-aided modeling, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-20064, https://doi.org/10.5194/egusphere-egu24-20064, 2024.
