Abstract UDC: 551.311:551.44 Gábor Szunyogh: A Theoretical Approach to Establish the Duration of Denudation on Limestone Surface

This paper deals with the question of how the duration of karstic denudation depends on the dip angle, the annual amount of precipitation, the rain intensity, and the prevailing wind direction and speed in case of an initially plane, sloping limestone surface without soil cover. The answer is given by the solution of a differential equation system describing the lowering speed of the rock surface. It turns out that the rate of the denudation does not increase in proportion to the intensity of precipitation and that it can never exceed a maximal value. Furthermore, long, soft rains result in higher annual denudation than short, abundant downpours. With increasing wind-speed the corrosion rate also increases, but above a certain wind speed the dissolution does not become faster. This paper presents numerical examples with diagrams about how these factors affect the expected duration of denudation