K Krukut River is Depok City and DKI Jakarta drainage system, however inthe last few years Jakarta City and Depok City is always run into frequent flooddisaster, because of overflowed in the Krukut River. In the study location was metwatershed land cover change functions, buildings development. it is not inaccordance with riparian river area regulation (Ministry of PUPR RegulationNo.28/PRT/M/2015), decline of body river, disposal waste and increasing ofsedimentation. With high rainfall intensity and existing river condition withmitigation of floods in the Krukut River that has not been completed (BBWSCiliwung Cisadane, 2017) become trigger the increasing flood disaster frequentlyin the Krukut River area.Identification of rainfall intensity and existing river condition need beconducted for calculation of 2,5,10,25,50 and 100 years return period usingGumbel Distribution and Log Person III method and the result of water levelrecording from AWLR station processed using HEC-RAS Programme.The results of hidrology analysis at Margasatwa AWLR was found thedesugn flood discharge for various return periode Q2 = 12.73 m³/det, Q5 = 16.61m³/s, Q10 = 19.31 m³/s, Q25 = 22.35 m³/s, Q50 = 24.73 m³/s and Q100 = 27.11m³/s. Based on the result of simulation and in the field investigation, riparian riverarea Characteristic Kali Krukut Watershed have buildings density closely levelbased on return period discharge that inundated some areas, where some areasmentioned from riparian area and bank river at Krukut River so that riparian areacharacterization affecting toward Krukut River water level.