Abstract
Flooding is a natural phenomenon that occurs due to overflowing river water that spreads towards the mainland or settlement. Way Leman River is one of the rivers located in Maluku Province which often overflows when the rainy season arrives, this has impacted such as damage to infrastructure, damage to public facilities, in this study simulating the flow of 2 conditions namely the condition without sabo dam buildings and conditions with sabo dam building. Simulation results show that there is a significant reduction in flood discharge with unsteady flow. This is shown in the simulation results with the condition of the sabo dam-building water level profile at the point of view has decreased the original height of the existing water level without sabo dam building +26, 75 m after the existence of the sabo dam building to +25.16 m or about 70.67% reduction of the water level profile.
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