Time of Concentration Estimated Using Some Methods and Application in The Ciliwung Watershed, Jakarta

Flood is one of the disasters that must be faced in lowlands with poor drainage system, when there high rainfall. Rainfall upstream River can affect water level downstream River. Calculation river discharge and forecast from time arrival flood Help prepare population to face disaster. That method used this lesson a quantitative analysis rainfall planned repatriate. Then, concentration (TC) before calculated use traveling method, Experience Resource Conservation Serve (NRCS) Kirpich. results compared HEC RAS observation method. research location Ciliwung watershed, tc calculation Katulampa (Bogor) MT. Haryono (Jakarta). show design using HSS Nakayasu for Q2 161.04 m3/s, Q5 187.07 Q 10 215.08 Q25 263.11m3/s, Q50 308.91m3/s Q100 364.34m3/s. Time Travel 12 hours 32 minutes, while NRCS 31 minutes Kirpich 52 minutes. observations about 13 hour 14 hours. The closest calculate under actual conditions