Tracer and modelling tools for the estimation of water fluxes and groundwater recharge

Christine Stumpp1
1 Institut für Bodenphysik und landeskulturelle Wasserwirtschaft, Universität für Bodenkultur Wien

9.1 in Artificial and natural groundwater recharge (co-organized by IAH-D)

26.03.2020, 13:45-14:00, Händel-Saal

Knowledge about water recharging aquifers is fundamental for sustainably managing water resources. Here, not only the amount and quality of the water fluxes to the aquifer are of main importance. Also the age of the recharging water or any time scales associated with transport through the vadose zone can help to better predict the vulnerability of aquifers. Both, tracer and mathematical modelling tools can help to improve our understanding of water fluxes and time scales of transport in the vadose zone. I will present several examples and challenges when using oxygen and hydrogen isotopes in pore water combined with different mathematical modelling approaches to get information about water fluxes and water ages. This includes analytical methods for the analysis of isotopes in pore water, experimental methods for estimating water fluxes in snow melt dominated Nordic environments, and complex modelling approaches for the quantification of variable mean water ages and the splitting of precipitation into recharge and evapotranspiration.

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