The annual sediment flushing operation is underway at the hydropower dam, releasing large volumes of silt-laden water through the spillway tunnel. Over time, sediment transported from upstream rivers accumulates in the reservoir, reducing storage capacity, affecting water flow, and potentially impacting turbine efficiency.
This controlled flushing process is essential for:
Restoring Reservoir Capacity – Removing built-up silt ensures optimal water storage for power generation and flood control. Protecting Turbines – Excess sediment can cause abrasive wear on turbine blades, reducing lifespan and efficiency. Maintaining Environmental Flow – Controlled sediment release mimics natural river processes downstream, benefiting ecosystems.
During the operation, water is released at high velocity through low-level outlets or flushing tunnels, carrying sediment downstream. While this temporarily discolors the river and increases turbidity, it is a crucial step for the long-term sustainability of hydropower projects.
Efficient sediment management is key to balancing energy production, water supply, and environmental protection in sediment-rich river basins.
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