GOMES FILHO, M. F.; http://lattes.cnpq.br/6507192664371500; GOMES FILHO, Manoel Francisco.
Resumo:
An analysis of the influence of the atmospheric large scale systems and mesoscale, on the
deviations of the volumes of water stored in the main reservoirs of Paraíba in Northeast of Brazil
is presented here. The analysis was accomplished under two different aspects: firstly, it was
investigated through the nature of the correlations between the anomalies of the temperature of
the Atlantic and Pacific Oceans on a global base and the volume anomalies for the three main
reservoirs of the state of Paraiba namely, Boqueirão , Coremas and Engenheiro Ávidos. The
results show that strong negative correlations exist among the surface temperatures of the Pacific
Ocean in the áreas denominated NINOl+2 and N1N03 and the considered volume anomalies.
Considering the influence of the mesoscale convective systems on the volumes, the analysis of
the histograms of frequency of the occurrence of these systems, that the largest activity of these
systems occur in the month of March in the áreas of the reservoirs and that in El Nino years that
activity is quite reduced, with large repercussions on the monthly volumes. To evaluate the
contribution of those systems for the volume of the reservoirs, a case study of an occurrence in
the month of May 1999, was made to estimate the volume of water contributed to the reservoirs
through the simulation of the corresponding river discharge, two hydrologic daily flow models,
being one global (Tank Model) and another distributed (NAVMO) were used for simulating the
flow. The results show that the mesoscale systems that occur on the area of the reservoirs are
responsible for the contribution of signifícant volumes.