In recent years there have been more dry and warm spring periods in Germany and especially in the administrative district of Lower Franconia. These spring droughts not only led to a considerable increase in the risk of forest fires, but also to drought stress events in forest communities. Regional and small-scale differences of these droughts also occur due to the small-scale variability of soil properties. The overall objective of the project is to investigate the spatiotemporal changes in soil moisture under the influence of the current climate and the site-specific soil properties, and to evaluate them with regard to the predicted warming of the atmosphere. Several selected sites with representative and different soil substrates will be investigated along a transect from the Vorspessart to the Hochspessart to the Steigerwald. A holistic research approach is used to characterise the spatially and temporally variable soil water balance, e.g. by the combination of in-situ measurements, remote sensing and geophysical monitoring. Findings of the project will be published in a generally accessible WebGIS in order to make spatiotemporal dynamics of the climate and the forest ecosystem easily recognisable and comprehensible.