Operational Model Development for Salinity Control

by Marvin A. Drake, US Army Corps of Engineers, New Orleans, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


The 800 km2 Breton Sound estuary and watershed in Louisiana is being modeled to characterize its salinity regime in terms of hydrometeorological and tidal processes. The ultimate purpose of the hydrologic modeling program is to develop an operational model for the Caernarvon Freshwater Diversion structure, which will discharge up to 280 m3/s from the Mississippi River to the estuary to control saltwater intrusion. The microcomputer-based model will apply time series of past, present and predicted future values of hydrometeorologic data to salinity time series to determine the diversion rates and gate settings required to achieve target salinity levels in the oyster reef zone. The estuary and watershed is also being numerically modeled to simulate the hydrodynamic and constituent transport processes for time scales of one day to six months or more for pre-and post-project conditions.

Subject Headings: Hydrologic models | Salt water | Estuaries | Tides | Numerical models | Coastal processes | Hydrometeorology | Mathematical models | Louisiana | United States | Mississippi River

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