F Floods and inundations that occur in the Cidawolong area have become a continuous problem. The frequency of floods reaches 10 times / year with an area of inundation about 12 hectares and a high of inundation range 0.3 to 1.5 m. The handling effort is used polder system whose components consist of storage, pumps, and normalizing the channel. The analysis includes hydrological analysis, hydraulic analysis, and the capacity of storage and pumps. Based on this analysis, a polder system can be applied to overcome flooding by designing a polder pool and normalizing the channel or river in the area. Based on the hydrological analysis, it is obtained the flood discharge, in calculating the planned flood discharge with a return period of 5 years obtained the discharge ranges from 7,897 m3 / sec - 36,898 m3 / sec. Based on the hydraulics analysis, the dimensions of the normalization channel are obtained with a return period of 5 years, using a rectangular shaped channel with a pair of river stones, the dimensions of the channel width range from 3.5 m - 12, 4 m with the depth of water is 1.5 m. Based on the analysis of the capacity of storage and pumps with 49744 m2 storage’s areas, the reservoir capacity of 114566,54 m3 is obtained, at 5 years period time, and the depth of the storage is 2.9 m.