Analisis Hidrologi untuk Perencanaan Sistem Polder di DKI Jakarta

The application of the polder system for flood control in DKI Jakarta has become a must coastal areas, especially with construction sea dikes along coast as solution to anticipate tidal flooding. One thing consider when using is how much pump capacity and reservoir are needed. To answer this quetions, hydrological analysis been carried out several method approaches, starting from determining rainfall design form depth duration frequency curve 1 hour 48 hours, then applied area reduction factor (ARF) corrected design. Natural Resources Conservation Service (NRCS) uses calculated runoff or effective unit hydrograph by time produce hydrograph. Based on approach, Sentiong Polder plan result that required 25-year return period 32 m3/s 50 100-year storage used 1,507,500 m3. If you want reduce capacity, it necessary increase capacity.