COMPARISON OF VOLUMETRIC AND DEFLAMETRIC METHOD WITH WIND EROSION EQUATION (WEQ) TO DETERMINE SOIL EROSION BY WIND EVENTS ON SELECTED SOIL UNIT

摘要

Despite the fact that wind erosion seriously affects the sustainable use of land in large part of the world and even though in Slovakia there is not that big percentage of agricultural land influence by wind erosion it still has an effect on the soil.Valid wind erosion model that predicts wind-blown mass transport on regional scale is lacking. The objective of this research was to compare two empiric methods to determine wind erosion. One of them is deflametric method, in which we capture soil unitsin one hour during wind erosion events. Second method we used was volumetric method where we calculate amount of eroded soil behind the wind barrier. With deflametric method we determined that actual wind speed needed to lift and carry soil unites is 9-10 m.s~(-1). With volumetric calculation we found out that our measurement is 1.7 times higher than in WEQ model. We can say that models can portray certain areas and soil types, but only field measurement can provide precise amount of eroded soil on particular land.