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https://hdl.handle.net/11681/45160| Title: | Technical assessment of the Old, Mississippi, Atchafalaya, and Red (OMAR) Rivers : Mississippi River HEC-6T model |
| Authors: | Copeland, Ronald R. Lewis, James W. |
| Keywords: | Diversion structures (Hydraulic engineering) Hydraulic structures Mississippi River Old River (La.) Sedimentation and deposition Sediment transport |
| Publisher: | United States. Army. Corps of Engineers. Mississippi Valley Division. United States. Mississippi River Commission. Coastal and Hydraulics Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | MRG&P Report (Mississippi River Geomorphology and Potamology Program (U.S.)) ; no. MRG&P Report No. 41; Volume 4 |
| Abstract: | The HEC-6T 1D numerical sedimentation model was used to evaluate the long-term and system-wide sedimentation effects of modifying the operation schedule at the Old River Control Complex (ORCC). The changes evaluated were the increase and decrease of the percentages of flow diverted from the Mississippi River at the ORCC and the modification of the distributions through the four ORCC structures. Also evaluated were dredging scenarios that removed sediment from the bed of the Mississippi River at the ORCC. Sedimentation effects for several operation and dredging scenarios were compared to a Base Condition that represented the existing operation protocols. The predictive simulations extended for 50 years. The model was used to calculate and compare sand transport past various gages along the Mississippi River and in the Outflow Channel. Dredging volumes at the deep-draft crossings and in Southwest Pass and above Head of Passes were compared. Differences in water-surface profiles in the vicinity of ORCC were determined. |
| Description: | MRG&P Report |
| Gov't Doc #: | MRG&P Report No. 41; Volume 4 |
| Rights: | Approved for Public Release; Distribution is Unlimited |
| URI: | https://hdl.handle.net/11681/45160 http://dx.doi.org/10.21079/11681/45160 |
| Appears in Collections: | MRG&P Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| MRG&P Report No 41-Vol 4.pdf | 11.77 MB | Adobe PDF |  View/Open |