Wilayah Perumnas Antang especially Jl. Bangkala In 5 Manggala Villages Of Manggala District of Makassar City, which is one of the areas where there is often puddles because the existing channels in the drainage system are not able to drain rainwater capacity so that rainwater is pumped into the road,itisalsocaused by the low topography and condition of the channel. not well connected to the study site. This study aims to find out how much rainwater runoff discharge and how the effect of runoff discharge on the capacity of Jl. Bangkala drainage channel in 5 Makassar City. The planned rainfall analysis calculation method uses the Pearson Type III Log Method using the average maximum daily rainfall in an algebraic average manner. For calculationn discharge plan uses Rational Method while for hydraulic analysis uses continuity formula. The results of this study showed that the results of the analysis obtained the highest channel

Keywords : Drainage, Rainfall, Runoff.