Difference between Flushing and Sluicing of Reservoir

Flushing Sluicing Flushing is done to remove sediment during high flood. Sluicing is done to remove sediment during plant operation. Intake structure aren’t operational during flushing as water level cannot be maintained. Intake structures can remain operational during sluicing as water level can be maintained. Outlet discharge is controlled by outlet structure. Outlet discharge is control by water level. Flushing has retrogressive erosion downstream. Retrogressive erosion doesn’t occur for sluicing. Flushing is done through bottom outlet. Sluicing outlet can be […]

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Components of Tunnel

Chainage The length along the longitudinal direction of tunnel Crown The top portion of tunnel is crown. It can be circular,semi-circular or rectangular in shape. Side/Wall The side portion of tunnel. It is generally vertical. Bench The bottom part of tunnel left after the excavation of heading is said to be bench. Excavation of face in done in multiple step for large cross sectional area. Invert The lower portion of tunnel Portal The entrance of tunnel is portal. Heavy support […]

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