Model USPED jako narzędzie prognozowania efektów erozji i depozycji materiału glebowego

The origin and development of the USPED (Unite Stream Power-based Erosion/Deposition) model and its application to erosion-deposition modelling within catchments areas of Pr1dnik and D3ubnia Rivers have been presented. The test area . upland region north to Cracow . is covered with highly erodible loess soils. Algorithms proposed by Mitasowa et al. (1999) have been adopted for the Idrisi32 GIS software chosen for modelling. The USLE (the Universal Soil Loss Equation) model parameters (R,C,K,P) have been used for the quantitative assessment of erosion effects. Rainfall and runoff erosivity factor (R) was approximated with Fournier index. The Renard et al. (1997) equation has been used to obtain the soil erodibility factor (K) values. This method was Chojen because of its simplicity . only basic data about soil granulation was necessary. The cover and management factor values (C) were taken from different authors (Koreleski,1992; Molnár i Julien, 1998; Pistocchi i in., 2002). Panchromatic IRS orthophotomap together with DTM (Digital Terrain Model) were used to assess the supporting erosion control practices factor (P). The factor values were used after Koreleski (1992). The results of this investigation enabled us to divide the test area into soil erosion intensity zones based on predicted soil loss values. Deposition areas predicted with USPED model have been presented as a separate zone. High and very high erosion rates have been predicted for 9,6% of the area in consideration. 47,2% Of the test area has been assessed as free from the soil erosion danger. The soils with the highest erosion rates are loess soils and limestone soils. The most of alluvial soil covered areas can be found among the deposition zones, what is in accordance with these soils genesis. The studies also indicated that USPED model seems to be very useful tool for soil erosion assessment together with deposition effect prediction of soils material within the particular catchments.