Heavy rain equations for Brazil
The IDF equation is widely used in several engineering areas to estimate rainfall intensities with a specific duration and frequency. These equations can be adjusted based on the series of pluviographic records or by the disaggregation of daily rain in shorter duration rains. In the present study, a survey of the IDF equations published in Brazil was carried out in 118 different types of publications. Until 2010, 634 IDF equations were registered, predominantly (61%) generated by pluviographic data.