Estimation of the Venturi effect as a leading factor of pluviometry in the Grazalema Mountain

Abstract

Climatologically, the Grazalema Mountain is one of the most interesting areas of the Iberian Peninsula. However, it has not been studied in detail. Thus, a detailed pluviometric analysis is presented by addressing the origin of its high rainfall records. The results obtained show that the high rainfall levels on average, annually recorded in Grazalema, (more numerous than the ones recorded on the stations located at the windward slopes) are caused by a leeward depression effect (with reinforcement of Venturi effect) produced by the Corredor del Boyar. In addition, it is evidenced that with the creation of new georeferenced extrapolated points with rainfall values, it is possible to obtain a more accurate rainfall cartographic than with other methods, due to the fact that these maps are better suited to the relief.