Hydrological droughts in Argentina and its relationship with macroclimatic indicators.

E DIAZ; GARCIA M; A RODRIGUEZ; O DOLLING; JC BERTONI

ciencias y tecnologia del agua

IMTA

Lugar: mexico; Año: 2017

0187-8336

In this paper, multiannual periodicities in the historical time-series average annual streamflows discharges of 14 rivers of Argentina and in ten macroclimatic indicators are identified using spectral analysis. The estimation of dominant frequencies of the analyzed time series allows to understand the time scale of the processes involved in the hydrological cycles. The spectral analysis found that high, low and medium frequency fluctuations contribute, in different percentages, to the flow variability. Then, this results have been compared with results of similar analysis performed on time series of macro-climatic indicators to calculate the relation of the evolution of these indicators with streamflows discharge series. These results constitute an important step toward implementing conceptual and forecasting models of deficit and excess of surface water in fluvial system for planning and management of the water resources.