Articles | Volume 22, issue 6
https://doi.org/10.5194/nhess-22-2099-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-22-2099-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
23 Jun 2022
Research article |
| 23 Jun 2022
| 23 Jun 2022
Different drought types and the spatial variability in their hazard, impact, and propagation characteristics
Erik Tijdeman
Hydrology and Climatology, Institute of Geography, Heidelberg University, Heidelberg, Germany
now at: Royal HaskoningDHV, Groningen, the Netherlands
Veit Blauhut
Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
Michael Stoelzle
CORRESPONDING AUTHOR
Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
Lucas Menzel
Hydrology and Climatology, Institute of Geography, Heidelberg University, Heidelberg, Germany
Kerstin Stahl
Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
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Low amounts of soil moisture (SM) in the root zone negatively affect crop health. We characterized the development and duration of SM stress across the croplands of southwestern Germany. Development time mainly varied within drought years and was related to the available water-holding capacity of the root zone. Duration varied both within and between drought years and was especially high in 2018. Sensitivity analyses showed that (controls on) SM stress and SM drought characteristics differ.
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Potential future groundwater and baseflow drought hazards depend on systems' sensitivity to altered recharge conditions. With three generic scenarios, we found different sensitivities across Germany driven by hydrogeology. While changes in drought hazard due to seasonal recharge shifts will be rather low, a lengthening of dry spells could cause stronger responses in regions with slow groundwater response to precipitation, urging local water management to prepare for more severe droughts.
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Short summary
We identified different drought types with typical hazard and impact characteristics. The summer drought type with compounding heat was most impactful. Regional drought propagation of this drought type exhibited typical characteristics that can guide drought management. However, we also found a large spatial variability that caused distinct differences among propagating drought signals. Accordingly, local multivariate drought information was needed to explain the full range of drought impacts.
We identified different drought types with typical hazard and impact characteristics. The summer...
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