The aim of this paper was to evaluate peat cover and water retention of the peat deposits in the Warta river basin. The total water resources of 972 peat deposits on the investigated area, considering water capacity index between 0,75 - 0,95, were calculated to 267,6 mln m3, and peatlands area index was β = 1,7%. Corrected inventory materials of peatlands in Poland were used for calculation. In terms of geology, among lowland bogs alder swamp-forest peat dominate (Alneti) and sedge peat (Cariceti) and sedge-reed peat (Cariceto Phragmiteti). Peat deposits of fluviogeneous and topogeneous alimentation prevail. Considering peatlands multifunctional importance, regional economy should always take notice of their hydrological function. ...
The aim of the undertaken research was an evaluation of the frequency of the dry and the wet months in the Opole Voivodeship in the months of May to September in1981-2010 years, in the view of the global warming. The dry and the wet months were characterized on the basis of hydrothermal index K, thermo-precipitation index A, standardized precipitation index SPI and the amount of the precipitation deficiencies and excesses of the late potato. The attempt of answering the question which of these indexes describe the moisture conditions of the vegetative season the best were undertaken.It was proved that the average frequency of months, in which the different level of draught's intensity was observed, was equal to 25% on the basis of the thermo-precipitation index A, 35% standardized precipitation index SPI, 36% hydrothermal index K, and 34% on the basis of the deficiencies precipitation amount. The average frequency of the wet months were counted to all four indexes and the values were: 23% on the basis of the thermo-precipitation index A, 23% standardized precipitation index SPI, 16% hydrothermal index K, and 29% on the basis of the deficiencies precipitation amount. The dependence between the four indexes and the yield of ...
