Seite - 282 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 1 Long Section of Brantas River The extreme degradation of riverbed causes the destruction of infrastructure across the river such as the landslide of the embankment, the deformation of the bridge pier, and the decline of the water level which causes the difficulty of water supply for the beneficiaries. Fig. 2 Damage of Deformation of Bridge Pier and Landslide of Embankment 4. SEDIMENT MANAGEMENT FLUSHING IMPLEMENTATION Rainfall, runoff, and river channel erosion provide a continuous supply of sediment that is hydraulically transported in rivers and streams. All reservoirs formed by dams on natural rivers are subject to some degree of sediment inflow and deposition. Because of the very low velocities in reservoirs, they tend to be very efficient sediment traps. Therefore, it is necessary to transfer sediment from reservoir to the downstream of the river. It is expected that flushing can keep the 282