Estimating surface flow based on the equation of heavy rain type LnLn / Estimativa do escoamento superficial baseado na equação de chuvas intensas do tipo LnLn

Abstract

is based on the IDF equation. This work aimed to adapt the methodology for use in locations with the LnLn-type equation. The equations for estimating the maximum instantaneous rainfall intensity and other adaptations for estimating the surface runoff were presented. Based on the intense rainfall equations of Piracicaba and Andradina, located in the state of São Paulo, Brazil, considering soils with a basic infiltration rate of 10, 25 and 50 mm.h -1 , the values of the soil water balance method were presented. The results showed that the differences obtained are due only to errors in the estimation of rainfall intensity due to the method of adjusting the parameters of the intense rainfall equations and that the equations presented in this article allow the use of the maximum flow depth estimation method. surface water balance for sites with the LnLn type equation.