Flood Control at Sampean Baru Dam and Gate Simulations

Abstract

The problem of flooding that often occurs requires serious management for its control. Dams are multipurpose functions, one of them being functioning as flood control. The Sampean Baru Dam located in Bondowoso Regency, East Java, functions as flood control and irrigation. The purpose of this research is to create a flood control scheme by simulating the operations of the seven gates of the dam. The utilized methods were flood forecasting (Synthetic Unit Hydrograph Nakayasu) and reservoir routing (continuity equation). The types of the gates are one tilting gate (located in the middle as the number 4 gate) and six radial gates (gates number 1, 2, 3, 5, 6, and 7). The results showed that the most optimal operation of the gate was the sequence of opening gates starting with gate 4, then gate 2 together with gate 6, then gate 1 together with gate 7, and if the water elevation was still high, then gate 3 was opened together with gate 5. The results of reservoir routing showed that the dam is still in a safe condition because the gates could route the peak flood discharge to the downstream areas, and thus the dam is safe from overtopping.