Avaliação do desempenho de equações IDF a partir de dados de precipitação de sensoriamento remoto (TMPA-v7)

Abstract

The demand for urban drainage systems was limited by the difficulties imposed by the cities, which demand precision in the design, considering the setback of excessive spending when oversizing and constant faults and their consequences when undersizing. The accuracy depends on several factors, being one of the most important, the precipitation, the input of water in a hydrological basin and component that influences all the water dynamics of the same. Its measurement is usually performed through Intensity-Duration-Frequency equations, constructed from series of annual maxima and sensitive to the size of this series. These annual maximums, of various durations, can be well measured by rain gauges, however the presence of these devices is scarce in the country, which leads to the use of rain gauges, a less precise apparatus and with poor distribution in the national territory. In this scenario it is possible to use remote sensing data, such as those obtained by the TRMM satellite that generates the product 3B42 v7, with rainfall data for a continuous mesh and with a temporal resolution superior to that of rain gauges. In the present work, the use of the 3B42 v7 product and precipitation data obtained from rainfall was explored, applying the disaggregation method proposed by CETESB (1979) and Gumbel-Chow distribution. As results, a new IDF equation can be provided for Pato Branco - Paraná with the use of 39 years of rainfall series, and the feasibility of using the TRMM data to construct IDF equations.