Drought definitions for groundwater recharge, groundwater depth and streamflow: Poelsbeek and Bolscherbeek catchments (the Netherlands)

Because of the slow development of a drought, people are often not aware of the emerging of droughts in time. More insight in the development of a drought can help the people to be aware of a drought in an earlier stage. Therefore it is important to study droughts. For the study of droughts a consistent set of drought definitions is needed. The time series which are used in this research were simulated with the model SIMGRO in an earlier study. SIMGRO is a physically based hydrological model. The model has different modules in which groundwater flow, streamflow, flow in the unsaturated zone and evapotranspiration are simulated. The model uses a horizontal schematization (subregions and nodal points are divided according to land use) and a vertical schematization (different geological layers with different hydrological characteristics).