Model of the windward slope formation of the eolian relief form

Abstract

The model for establishing the windward slope upon exposure to the air flow is based on the analysis of the state of the layer composed of sandy incoherent particles. It is assumed that the wind removal of individual particles of this layer leads to a change in its length due to rolling and immobility of larger particles. Accounting for precipitating saltating particles gives an idea of the reasons for the alternation of layers of large particles with layers of smaller ones involved in wind-sand transport. Assuming a linear dependence of the dynamic velocity on the height of the location on the windward slope, the forms of the windward slope, which are close to the observed ones, are obtained. An algorithm for determining the linear coefficient of change of dynamic velocity is proposed. The calculation of the relative change at different levels of the windward slope of the values of the roughness parameter and the scale of the laminar layer made it possible to estimate the coefficient of surface resistance.