The Wielkopolski National Park is located in the mid-part of the Warta river basin, in central part of Wielkopolska region, near Poznań city. The area is placed in the western part of the Wielkopolska-Mazovian climatic region. The natural landscape is of glacial type of Pleistocene and Holocene formation. Scot pine (Pinus silvestris) is the dominant species but also Common oak (Quercus robur), Silver birch (Betula pendula), alder (Alnus glutinosa) and Red beech (Fagus silvatica) are present there. The predominant habitats are: fresh broadleaved forest, fresh mixed broadleaved forest and fresh nixed coniferous forest. In paper the original method of potential water storage coefficient estimated for The Wielkopolski National Park has been presented. The idea of the method is as follows – for each elementary area (a square cell of 0.5 km side) exclusive potential water storage coefficient is assigned. This coefficient focuses converging influence of 8 parameters: area slope, soil thickness, infiltration coefficient of soil, distance from watercourse network, distance from pond and lake network, dominant forest site, dominant species of species composition and class of tree stand age. The next step in the course of calculation is division of the variability range of 8 above-mentioned parameters into 3 classes ...
