The effect of moving rainstorm in increasing river discharge in Ciliwung Basin, Case Study: 15-16 January 2013 flood events

The objective of this study is to investigate the effect of moving rainstorm in increasing peak discharge in the 2013 flood event in Ciliwung Rivers Basin (CRB). The effect is analyzed based on 13 scenarios of synthetic rain, i.e.: (1) three scenarios for stationer rainfall that: uniformly distributed along the basin, concentrated in upstream area, and concentrated in downstream areas; (2) ten scenarios of the moving rainfall for 0.5, 1, 2, 4, or 8 m/s velocity and to downstream or to-upstream direction of movement. The scenarios are done based on equivalent volume. The hydrological simulation conducted by distributed hydrological model, Gridded Surface Subsurface Hydrologic Analysis (GSSHA). The result shows that moving rainstorm has significant effects in increasing the peak discharge and decreasing the time to peak of the discharge in the CRB.