Drought is caused by a combination or series of climate anomalies, which combined with low antecedent storage in surface and subsurface systems, may lead to a water deficit in streamflow and groundwater (hydrological drought). It is commonly characterized by a deviation from average conditions in different parts of the hydrological cycle, such as precipitation, soil moisture and streamflow.
In this study, we particularly want to analyse groundwater drought. The focus will be on comparing different groundwater drought indices (e.g. the lowest groundwater level, or the time below a certain threshold) and their applicability to map extreme events across different hydroclimatological regimes in the Nordic region.
The work will be a contribution to the Water4All project "GroundedExtremes", and use daily time series of groundwater level from the Nordic countries (with the exception of Iceland).
