Characteristics of water below the soil.The vast majority of the groundwater, namely more than 90% of their volume, is collected in large depths in the gaps, rock lens, sometimes creating whole underground lake. These are deep waters, which often people do not know, because it does not have an exact map of the world groundwater. These are deep waters, often salted with salt even in nature. The resources of these waters, due to the very long period of exchange, which lasted hundreds of thousands of years, or even millions, to be considered as non-renewable. Groundwater contained Pryce, otherwise known as groundwater, actively participate in the circulation of water. The period of exchange is very diverse. For example, the exchange of moisture in the soil and shallow aquifer layers takes place each year, while in the deeper aquifer layers can take hundreds or even thousands of years. Ground water is fed primarily by rainfall, so with some exceptions, these are freshwater. Part of groundwater is linked to the ice. The size of the groundwater supply depends both on climatic conditions, and terrain and permeable ground. Skyjacker water stops at the low-permeable layers avalanche