Isotope‐aided modelling of ecohydrologic fluxes and water ages under mixed land use in Central Europe: The 2018 drought and its recovery
| Autor: | Marco P. Maneta, Chris Soulsby, Doerthe Tetzlaff, Aaron Smith, Lukas Kleine |
|---|---|
| Přispěvatelé: | Tetzlaff, Doerthe, 1 Department of Ecohydrology IGB Leibniz Institute of Freshwater Ecology and Inland Fisheries Berlin Berlin Germany, Kleine, Lukas, Maneta, Marco P., 4 School of Geosciences University of Montana Missoula Montana USA, Soulsby, Chris, 3 Northern Rivers Institute, School of Geosciences University of Aberdeen Aberdeen UK |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
forest hydrology
010504 meteorology & atmospheric sciences Land use European research tracer‐aided modelling water ages 0207 environmental engineering Transit time 02 engineering and technology 01 natural sciences Constructive complex mixtures Geography Review process 333.91 Physical geography Ecohydrological modelling transit times 020701 environmental engineering isotopes 0105 earth and related environmental sciences Water Science and Technology Isotope analysis |
| Popis: | Understanding the interactions of vegetation and soil water under varying hydrological conditions is crucial to aid quantitative assessment of land‐use sustainability for maintaining water supply for humans and plants. Isolating and estimating the volume and ages of water stored within different compartments of the critical zone, and the associated fluxes of evaporation, transpiration, and groundwater recharge, facilitates quantification of these soil–plant‐water interactions and the response of ecohydrological fluxes to wet and dry periods. We used the tracer‐aided ecohydrological model EcH2O‐iso to examine the response of water ages of soil water storage, groundwater recharge, evaporation, and root‐uptake at a mixed land use site, in northeastern Germany during the drought of 2018 and in the following winter months. The approach applied uses a dynamic vegetation routine which constrains water use by ecological mechanisms. Two sites with regionally typical land‐use types were investigated: a forested site with sandy soils and a deep rooting zone and a grassland site, with loamier soils and shallower rooting zone. This results in much younger water ages (8 months in the grassland). The temporal evaluation of the responsiveness of soil and vegetation interactions in hydrologic extremes such as 2018 is essential to understand changes in hydrological processes and the resilience of the landscape to the longer and more severe summer droughts predicted under future climate change. |
| Databáze: | OpenAIRE |
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