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Due to the ongoing climate change, decreasing amounts of available water and increasing evapotranspiration during the growing season may impact the stability of some beech ecosystems at lower altitudes. This paper aims to evaluate the risk of drought from a meteorological point of view and the subsequent response in soil hydrology throughout hydrological years 2015 and 2016 in beech forests situated in Central Slovakia. Precipitation sufficiency was assessed by means of a climate irrigation index (CII). Hydrological modelling was carried out using GLOBAL, the simulation model of water movement in a soil profile with an emphasis on the root zone. The greatest drought risk occurs during the summer, when the ecosystem suffers from long periods of water deficiency according to the CII (&gt;20 days). The water content in specific soil horizons responds differently to changing meteorological situations. Simulations indicated a later decrease (approx. 5 days) of the water content in the B horizon (main root zone) compared with the A horizon. Drought lasts longer in deeper layers and retreats only in the case of long-lasting rainfall. Sudden heavy rainfall has proven ineffective at moistening the entire soil profile and impacts only the upper few centimetres while the main root zone suffers from water shortage.

Understanding the Complexity of Drought within the Soil Profile in Beech Ecosystems on Their Lower Altitudinal Limit in Slovakia