Subsurface transport of water, carbon and heat - combined hydrological, geochemical and isotopic approach
Inter-disciplinary conjoint research on mutual impacts of coupled terrestrial hydrological and carbon cycles. Measured chemical and isotopic composition of subsurface and surface water was used to evaluate water and carbon fluxes within a small experimental catchment in the Bohemian crystalline massif. Monitored mobility of geochemical and isotopic tracers, supported by hydrogeological, hydropedological and hydrometeorological observations, supplied information for modeling of flow of water, and transport of solutes and heat in the soil-bedrock environment. The governing properties and transport mechanisms were studied at multiple scales ranging from the soil sample scale to small catchment scale.
Extensive database of hydrological, hydrochemical and isotopic data, characterizing individual components of hydrological cycle (precipitation, surface and subsurface runoff, soil water and groundwater), was acquired. Data related to the stable isotope content of different forms of organic carbon (DOC and POC) represent a unique component of this database. The collected data were used for numerical modeling of fluxes of dissolved organic carbon, for modeling of individual components of the catchment water balance and runoff (soil water stored at hillslope sites, riparian peat water, and deep groundwater) and for the determination of the contribution of these components to the dynamics of streamflow discharge. Special attention was paid to the model assessment of groundwater residence times in the area of interest, determined by means of selected tracers (18O, 3H - 3He, CFC), and to the assessment of runoff dynamics in forested mountainous headwater catchments in the broader context of a large river basin with variable topography and land use.
Dusek J, T Vogel, M Dohnal, JAC Barth, M Sanda, A Marx, J Jankovec, Dynamics of dissolved organic carbon in hillslope discharge: Modeling and challenges, Journal of Hydrology, 2017, 546, 309-325, http://dx.doi.org/10.1016/j.jhydrol.2016.12.054.
Votrubova, J, M Dohnal, T Vogel, M Sanda, M Tesar, Episodic runoff generation at Central European headwater catchments studied using water isotope concentration signals, Journal of Hydrology and Hydromechanics. 2017, 65, http://dx.doi.org/10.1515/johh-2017-0002.
DUŠEK, J. and VOGEL, T., Hillslope-storage and rainfall-amount thresholds as controls of preferential stormflow, Journal of Hydrology. 2016, 534, 590-605. http://dx.doi.org/10.1016/j.jhydrol.2016.01.047.
VOGEL, T, J Votrubova, J Dusek, M Dohnal, Mesoscopic aspects of root water uptake modeling – hydraulic resistances and root geometry interpretations in plant transpiration analysis. Advances in Water Resources. 2016, 88, 86-96, http://dx.doi.org/10.1016/j.advwatres.
ŠANDA, M., P Sedlmaierová, T Vitvar, C Seidler, M Kändler, J Jankovec, A Kulasová, F Paška, Pre-event water contributions and streamwater residence times in different land use settings of the transboundary mesoscale Lužická Nisa catchment, Journal of Hydrology and Hydromechanics. 2017, 65, http://dx.doi.org/10.1515/johh-2017-0003.
JANKOVEC J, T VITVAR, M ŠANDA, T MATSUMOTO, and LIANG-FENG HAN, Groundwater recharge and residence times evaluated by isotopes of hydrogen and, oxygen, noble gases and CFCs in a mountain catchment in the Jizera Mts., northern Czech Republic, Geochemical Journal, 2017.