Page - 696 - in Book of Full Papers - Symposium Hydro Engineering

However, to protect and maintain the river bed downstream of the weir, Scenario 3 was applied by using fully stone riprap at downstream of the dam spillway. Based on the simulation, there was no scouring occurs (see Figure 12). Therefore, this condition can be preferred to be used as a final design of the dam in order to have a proper design of stepped spillway. Scouring comparison from 3 scenarios can be seen on Figure 13. Fig. 12. Scouring condition at downstream of spillway (Scenario 3) Fig. 13. Scouring comparison from different scenarios 696