Abstract

REY, Juan C et al. Analysis of precipitation aggressiveness and concentration in Venezuela: IV. Los Andes Region . Bioagro [online]. 2012, vol.24, n.2, pp.115-120. ISSN 1316-3361.

The distribution and aggressiveness of the precipitation in Los Andes region of Venezuela was evaluated by analyzing monthly precipitation data from 56 meteorological stations. The modified Fournier index (FMI) and precipitation concentration index (PCI) were calculated to assess rain aggressiveness and rain distribution, respectively. The index values were analyzed using univariate and geostatistical analysis adjusting semivariograms to theoretical models. For mapping of the spatial distribution of indices punctual kriging interpolation method was carried out, generating the appropriate file, which was finally edited in ArcView. The results pointed out that the region under study has high and very high rainfall aggressiveness over 70% of the entire territory, while the distribution of rainfall was moderately seasonal. Rainfall aggressiveness, in combination with the predominance of a sloped relief increases the risks of soil degradation, with the annual rainfall ranging from 500 to 3900 mm. In this sense, soil conservation practices should be considered on existing crop production systems in the evaluated region.

Keywords : Geostatistics; modified Founier index; precipitation concentration index; sustainable land management.