Abstract

LUNA-ROMERO, Angel Eduardo et al. Spatio-temporal distribution of precipitation in the Jubones river basin, Ecuador: 1975-2013. Scientia Agropecuaria [online]. 2018, vol.9, n.1, pp.63-70. ISSN 2077-9917.  http://dx.doi.org/10.17268/sci.agropecu.2018.01.07.

The compression of the hydrological cycle of the Jubones river basin (JRB) is still complex, arising the need to characterize the spatio-temporal distribution of basin precipitation, due to the rugged topography and influence of the Pacific Ocean (PO) on climate and precipitation. The methodology which adopted to evaluate precipitation for the 1975-2013 series was performed two analyzes. The first one, for the spatial variability, the elevation - precipitation ratio, the spatial distribution and the identification of rainfall regime were determined. The second, for the temporal variability included an analysis of seasonality and stationarity. As a result, due to the complex orography, it was not possible to define a unique relationship between mean annual precipitation and elevation (R2 = 0.19). Abundant rainfall was recorded below 500 m.a.s.l. and decreases in the central part of the upper basin. The spatial variability is highly heterogeneous, but it is well represented by two regional vectors (low and Andean region), the rainfall regime is unimodal with a marked seasonality in the VR1 and a low seasonality for the VR2, the CRJ presents an increase of 0.21% of precipitation, but the trend is not significant

Keywords : Jubones; rainfall; spatio-temporal; rainfall regime; trend.

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