2019-10-292019-10-292019-05-15LIRA, Bruna Roberta Pereira. Avaliação do comportamento e da tendência pluviométrica na Amazônia Legal no período de 1986 a 2015. Orientador: Lindemberg Lima Fernandes. 2019. 129 f. Dissertação (Mestrado em Engenharia Civil) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2019. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/11985. Acesso em:.https://repositorio.ufpa.br/handle/2011/11985Amazonia awaken interest in the scientific environment because it is the largest rainforest in the world, due great water and solar energy availability, fundamental for regional and global climate regulation. In this context, this research analyzes the behavior of the annual and seasonal rainfall in Legal Amazon over 30 years (1986 to 2015), throught data from 268 rainfall stations available in the hydrometeorological network (HidroWeb) of the National Water Agency (ANA), in order to contribute a water resources management and planning in this region. The spatial and temporal dynamics from precipitation were analyzed through isoietas maps over interpolation of linear ordinary kriging, the average precipitation estimation by the isoietas method and the estimation about volume precipitated by the contour method. Regionalization was analyzed using Ward's hierarchical clustering method and trend as well as magnitude by the Mann Kendall and Sen's non-parametric tests, respectively. The results indicate annual mean precipitation of 2,070 mm, corresponding to 5.67 mm/day, however there is a wide variation in the increasing spatial pluviometric behavior from the south towards the north and also temporal variation, both in the interannual and in the seasonal. Through annual precipitation regionalization as well as latitude and longitude geographic coordinates, three regions show the different pluviometric patterns with variations in mean precipitation, with the south region average of 1,733 mm / year, east of 1561 mm / year and north of 2,390 mm/year, and coincides with the main atmospheric operating systems. As in the regionalization of the monthly precipitation, it was observed that the seasonal behavior varied quite well between the regions, as shown by the climatological normal, from rainy periods, transition periods and less rainfall. Statistical tests indicate both positive and negative trends and magnitudes for annual and monthly precipitation, statistically significant for the significance level of 5%. However, an average rate of 5 mm per year in the study area is estimated. Therefore, it is concluded that the pluviometric behavior is not homogeneous, influenced by atmospheric systems and phenomena, mainly by the La Niña and El Niño strong events. Traditional, three homogeneous regions demonstrate the main pluviometric parameters, but the more similar regions indicate a larger number of homogeneous regions, since it is an extensive region with a wide variety of pluviometric water. Where changes are crucial and can not be pluviometric, they can become hydrological and climatic hazards.Acesso AbertoComportamento Pluviométrico- Amazônia LegalDinâmica Espacial e Temporal- Amazônia LegalAgrupamento pluviométrico- Amazônia LegalTendência de PrecipitaçãoMagnitude de PrecipitaçãoPluviometric behaviorSpatial and Temporal DynamicsClustering PrecipitationPrecipitation Trend and MagnitudeDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::RECURSOS HIDRICOSRECURSOS HÍDRICOS E SANEAMENTO AMBIENTALENGENHARIA HÍDRICA