Estimating water balance components of tropical wetland lakes in the Pantanal dry season,Brazil |
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| Authors: | J Schwerdtfeger M Weiler MS Johnson EG Couto |
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| Institution: | 1. Chair of Hydrology, University of Freiburg, Freiburg, Germanyjulia.schwerdtfeger@hydrology.uni-freiburg.de;3. Chair of Hydrology, University of Freiburg, Freiburg, Germany;4. Institute for Resources, Environment and Sustainability and Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, British Columbia, Canada;5. Faculdade de Agronomia e Medicina Veterinária (FAMEV), Departamento de Solos e Engenharia Rural (DSER), Universidade de Mato Grosso (UFMT), Cuiabá, Mato Grosso, Brazil |
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| Abstract: | AbstractWater balance studies with stable water isotopes have rarely been conducted in remote and tropical wetland areas. As such, little is known regarding the water balance and groundwater–surface water interaction in the Pantanal, one of the largest and most pristine wetlands in the world. We applied MINA TrêS, a water balance model utilizing stable water isotopes (δ18O, δ2H) and chloride (Cl-) to assess the dry-season hydrological processes controlling groundwater–surface water interactions and the water balance of six floodplain lakes in the northern Pantanal, Brazil. Qualitatively, all lakes exhibited similarity in hydrological controls. Quantitatively, they differed significantly due to morphological differences in controlling groundwater inflow and lake volume. Our approach is readily transferable to other remote and tropical wetland systems with minimal data input requirements, which is useful in regions with sparse hydrometric monitoring. Editor Z.W. Kundzewicz |
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| Keywords: | Pantanal dry season stable water isotopes chloride water balance groundwater–surface water interactions |
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