HYDRAULIC CHARACTERISTICS OF RIGOLETS PASS, LOUISIANA, HURRICANE SURGE CONTROL STRUCTURES; HYDRAULIC MODEL INVESTIGATION.

The Rigolets model described was a fixed-bed model constructed to undistorted linear scale ratios of 1:100 horizontally and 1:100 vertically. The region reproduced by the model is 3. 2 miles of the Rigolets, starting at the Lake Pontchartrain entrance of the Rioglets. The model was equipped with the necessary appurtenances for reproduction of steady-state flow in both ebb and flood directions and accurate measurement of water-surface elevations and currents under this conditions. Verification tests were conducted to make certain that the model hydraulic regimen agreed with that of the prototype.