Distribución espacio-temporal de la precipitación en la cuenca de Marcabelí

Abstract

The understanding of the hydrological cycle in the Marcabelí River basin remains complex, making it necessary to characterize the spatio-temporal distribution of precipitation in the area. This need arises due to the area's rugged topography and precipitation patterns. Two analyses were used as a method to evaluate precipitation for the 1990-2011 serie. First, for spatial variability, the relationship between elevation and precipitation, spatial distribution, and the detection of rainfall regimes are promoted. The second, in relation to temporal variability, was a study of seasonality and stationarity. A unique relationship between the average annual precipitation and elevation was found (R=0.0273), indicating a weak relationship between both variables. The interannual precipitation variability in the analyzed region shows significant fluctuations over the period 1990-2011. The rainfall regime represented in the figure shows a unimodal pattern, characterized by a concentration of precipitation in the first five months of the year. The Marcabelí River basin from 1990 to 2011 shows a decrease of 0.73% in precipitation, but the trend is not significant.