Srovnání potenciální a skutečné erodovatelnosti půdy větrem

Abstract

Areas the most susceptible to wind erosion were chosen for the comparison of potential and real erodibility of soil by wind. All the areas are located in the Southern Moravia, the south-east of the Czech Republic. Ambulatory measurements of parameters required for wind erodibility determination were done during 2006 in three districts that are heavily endangered by wind erosion (districts of Breclav, Znojmo and Uherske Hradiste). Potential and real erodibility by wind was determined from wind velocity, soil humidity, content of clay and non-erodible soil particles. Potential soil loss does not go over the limit of the tolerable amount of soil loss 10 t.ha – 1.year – 1 at any studied area, even though all the three areas belong to the ones strongly susceptible to wind erosion. On the other hand, the tolerable soil loss for real erodibility 1.4 g.m – 2 was exceeded at two regions. Non-objectivity in the erodibility evaluation of heavy clay soils follows out of the results, as so as evident necessity of new knowledge concerning the determination of wind erosion intensity, because to date used equations come out of presumption that the more clay particles soil contains, the less susceptible to wind erosion is, which is inaccurate.