The spatial and temporal characteristics of snow conditions in small mountain catchments to the needs of modeling of water supply

The mountain forests ecosystems play huge hydrological role overhung activity of ministries of environment and agriculture. The focus of project is on long time monitoring cycle in environment in mountain forests conditions. In orographic broken conditions in Slovakia snow pack as an important part of a mountain ecosystems water balance plays a climatic, ecological, environmental as well as hydrological consequence. To finding quantity of snow water supply depend maintanance on the spring floods. Until these days experimental data of winter hydrological regime of forest mountain ecosystems lack. One of the global changes attribute can be absolute respective full range disappearance snow cover. On the base of climate change scenarios we can expect the changes in quality, temporal and spatial snow distribution also in mountain forest ecosystems. Possible future reduction (or increase in the some areas) of snow cover will bring qualitative and quantitative changes in biological and chemical properties.