Variabilidade temporal e espacial da precipitação incidente sobre a unidade de gerenciamento de recursos hídricos Sorocaba e Médio Tietê e anomalias

• Ano de defesa: 2016
• Autor(a) principal: Franceschini, Andréa Teixeira de Lima [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Rainfall anomalies; Variability of precipitation; Index; Water resources management unit; Anomalias pluviométricas; Variabilidade de precipitações; Índices; Unidade de gerenciamento de recursos hídricos
• Link de acesso: http://hdl.handle.net/11449/138198

This study analyzed the variability of precipitation occurred in the area of Sorocaba Water Resources Management Unit and the Middle Tietê River Basin River Tietê (UGRHI 10) and its anomalies 50 rain gauges were chosen representing the study area and adopted as range the time period from 1974 to 2008. He was studying the fallout and its statistical parameters: mean, standard deviation, coefficient of variation, maximum, minimum and amplitude. It was performed the analysis of time series, with calculation of indices of daily IC and monthly ICP concentration and the relation between the percentage of rainy days in a row and the cumulative percentage of precipitation that contributed to the cumulative percentages of days the occurrence: PP5 , PP10, PP15, PP20, PP50. The heterogeneous monthly rainfall was analyzed using the concentration ratio rain ICPs is the amount of rainfall in the month calculated for each of the gauges and for each year during the study period. The quantification of the deficit or excess rainfall in different time scales was performed by calculating the Standardized Precipitation Index (IPP) checking the water availability in the study area. It was applied to Goestatistics to verify the existing spatial correlation between the selected rainfall stations. In the result we highlight two areas: the first covering the southeast and northwest and the second the central-eastern region and the midwest. In the first presenting elevations and slopes occurred the highest values of the concentration index and the second presenting mild relief and large hills showed the lowest values. Regarding the monthly rainfall, the entire unit had moderate concentration. The year 1983 was humid presenting excess rainfall, as noted in its positive IPP values since 1985 was a dry year with rainfall deficit where the biggest negative IPP were found.