Numerical Simulation of Unsteady Hydrodynamics in the Lower Mississippi River

Alterations along the Mississippi River, such as dams and levees, have greatly reduced the amount of freshwater and sediment that reaches the Louisiana coastal area. Several freshwater and sediment diversions have been proposed to combat the associated land loss problem. To aid in this restoration effort a 1-D numerical model was calibrated, validated, and used to predict the response of the river to certain stimuli, such as proposed diversions, channel closures, channel modifications, and relative sea level rise. This study utilized HEC-RAS 4.0, a 1-D mobile-bed numerical model, which was calibrated using a discharge hydrograph at Tarbert Landing and a stage hydrograph at the Gulf of Mexico, to calculate the hydrodynamics of the river. The model showed that RSLR will decrease the capacity of the Lower Mississippi River to carry bed material. The stage at Carrollton Gage is not significantly impacted by large scale diversions

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Civil and Environmental Engineering

Year

2010

Author dc:creator

• Davis, Mallory

Contributors dc:contributor

• McCorquodale, J. Alex
• Barbe, Donald
• Cothren, Gianna

• Lower Mississippi River
• Unsteady Hydrodynamics
• Fixed Bed
• Diversions
• HEC-RAS Model

Repository record dc:identifier

https://scholarworks.uno.edu/td/1126

OAI identifier oai:identifier

oai:scholarworks.uno.edu:td-2107