Comite River Diversion, Comite River, Louisiana: Hydraulic Model Investigation
Final technical rept.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB
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The proposed Comite River Diversion Project was designed to lower flood stages along the Comite and Amite River by diverting Comite River flood flows to the Mississippi River. The initial plan consisted of a Comite River stage control structure with levees, a Comite River diversion structure, a Comite River diversion channel, and a diversion channel stage control structure DCSCS. Tests were conducted on a 136-scale model of a section of the Comite River, the diversion, the diversion channel, and the diversion structure to determine the flow distribution at the diversion and the hydraulic performance of the diversion structure. Initially, a 125-scale model of the DCSCS was tested to verify the discharge rating curve and evaluate the hydraulic performance of the structure. Through testing on the 136-scale model, a diversion plan was developed that eliminated the Comite River stage control structure and portions of the levees and also modified the uncontrolled weir of the diversion structure. The desired flow distribution at the diversion was accomplished by modifying the size of the diversion channel. The flow conditions observed in the 125-scale model of the DCSCS indicated that stilling basin performance was unacceptable and excessive velocities were present in the exit channel. The DCSCS was redesigned and tested using a 136-scale model that provided additional lengths of approach and exit channel than previously tested in the 125-scale model.
- Hydrology, Limnology and Potamology
- Civil Engineering