Summary:

The natural and man-caused climate changes are the cause of hydrologic disturbance. Throughout the last decades of XXth century, particularly at the beginning of 8th decade of XXth century a groundwater level decreased over 6,000 ha area in Kaliska Forest District. The hydrologic disturbance lasted until the mid-9th decade of XXth century and the study on hydrological restitution project was undertaken at that time. The project had been implemented since 1996 to 2003. As a result the rise of groundwater level has been observed over the area of 5,000 ha. The surface water storage and ground water level has been monitored for the period 2012-2013 after thawing at the early Spring till the next late Autumn first snowfall. Groundwater storage sates undergo long and short-term changes. Short-term changes are the result of meteorological conditions and uptake of water by the vegetation. Long-term variability is caused by e.g. forest stand dynamics. Due to relatively short period of the groundwater level monitoring, the paper discusses solely short-term variability of groundwater level.