Vol. 14 No. 5 (2019)
These maps show the distribution of heavy rainfall in Brazil based on a 5-year return period. These results were obtained from IDF (intensity-duration-frequency of heavy rain) relationships of gauge stations in the Brazilian territory. The map in the top left shows heavy rainfall with 5-minute duration. The one to the right shows 30-minute duration. The one at the bottom left shows 60-minute duration and the last one to the right 120-minute duration. According to these results, the highest values are concentrated in the Amazon region and in the southern part of the country and the lowest in the semi-arid region in the northeast. These estimates are important for the design of micro-drainage structures preventing them from being damaged by heavy rainfall events.
Source: SOUZA, G. R. de. et al. Heavy rainfall maps in Brazil to 5 year return period. Rev. Ambient. Água, Taubaté, vol. 14 n. 5, p. 1-10, 2019. doi:10.4136/ambi-agua.2403