Spillway for Aliceville Lock and Dam, Tombigbee River, Alabama: Hydraulic Model Investigation.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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Tests were conducted on a 136-scale model of the Aliceville spillway to develop an energy dissipator and plan of riprap that would provide adequate protection of the exit channel both for normal operating conditions and for the condition of one gate opened full with minimum tailwater conditions, a situation that could occur during an emergency or misoperation. The spillway consists of a 280-ft length of broad-crested weir controlled by four 26-ft-high and 60-ft-wide tainter gates and a 150-ft length of uncontrolled ogee-shaped weir. The original design stilling basin performed satisfactorily with all gates opened equally up to 6 ft. However, with higher gate openings and particularly with a single gate opened one-half or full, flow contraction was experienced in the exit channel and thus induced a depression of the water surface and excessive velocities. A series of tests to determine discharge characteristics revealed that data from a previous model investigation could be used to obtain the discharge coefficients of the Aliceville spillway.
- Civil Engineering