The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes
Source: https://erdc-library.erdc.dren.mil/jspui/ The Wax Lake Outlet and Atchafalaya River deltas in Louisiana have grown dramatically, and concern over the impact of this growth has led the US Army Corps of Engineers to conduct an investigation to predict how the deltas will evolve over the next 5...
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U.S. Army Engineer Research and Development Center (ERDC)
1992
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fthenry:oai:henry.baw.de:20.500.11970/111966 2023-07-30T04:02:37+02:00 The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes Donnell, Barbara Park Letter, Joseph V. Jr. United States. Army. Corps of Engineers. New Orleans District. 1992 application/pdf https://hdl.handle.net/20.500.11970/111966 eng eng U.S. Army Engineer Research and Development Center (ERDC) Hydraulics Laboratory (HL) Vicksburg, Mississippi http://hdl.handle.net/11681/13294 Technical Report HL-82-15 rept. 12 United States. Army. Corps of Engineers. New Orleans District. (Hg.) (1992): The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes. Vicksburg, Mississippi: U.S. Army Engineer Research and Development Center (ERDC) (Technical Report, HL-82-15 rept. 12). https://hdl.handle.net/20.500.11970/111966 Alle Rechte vorbehalten Ingenieurwissenschaften (620) Atchafalaya River Atchafalaya River Delta Atchafalaya Basin Louisiana Terrebonne Marshes Hydrodynamics Wax Lake Outlet Delta evolution Delta growth TABS-2 Computer program Numerical model Mathematical model Sediment transport Sedimentation Deposition Salinity Saltwater encroachment Geomorphology Verification Subsidence Report Published Version 1992 fthenry https://doi.org/20.500.11970/111966 2023-07-16T23:06:51Z Source: https://erdc-library.erdc.dren.mil/jspui/ The Wax Lake Outlet and Atchafalaya River deltas in Louisiana have grown dramatically, and concern over the impact of this growth has led the US Army Corps of Engineers to conduct an investigation to predict how the deltas will evolve over the next 50 years. An additional task was to determine the impacts of that growth on navigation, flood control, salinity, and sedimentation in the bay area. The technical approach for this investigation builds upon the TABS-2 finite element numerical modeling system and is fully described in Report 11 of this series. Comparisons of the existing condition results with various alternatives are presented. In summary, the extension of the Avoca Island Levee to Beer Island (Reach 2) resulted in an approximate 8 percent increase in the predicted size of the 50-year delta evolution regardless of other constraints tested. For all alternatives tested, the size of the 50-year subaerial delta fell within the bounds of 56 to 144 square miles. The most extreme delta evolution simulation tested was the condition without the Wax Lake Outlet flow control project, no navigation channel dredging, and no levee extension. For all delta evolution simulations tested, the water surface elevations within areas east of the levee increased from 3.4 to 6.0 ft by year 2030. In each case tested, the Avoca Island Levee Extension to Reach 2 decreased the backwater effect of the 50-year delta by approximately 2 ft. Report Beer Island Henry - Hydraulic Engineering Repository Beer Island ENVELOPE(-65.681,-65.681,-66.004,-66.004) |
institution |
Open Polar |
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Henry - Hydraulic Engineering Repository |
op_collection_id |
fthenry |
language |
English |
topic |
Ingenieurwissenschaften (620) Atchafalaya River Atchafalaya River Delta Atchafalaya Basin Louisiana Terrebonne Marshes Hydrodynamics Wax Lake Outlet Delta evolution Delta growth TABS-2 Computer program Numerical model Mathematical model Sediment transport Sedimentation Deposition Salinity Saltwater encroachment Geomorphology Verification Subsidence |
spellingShingle |
Ingenieurwissenschaften (620) Atchafalaya River Atchafalaya River Delta Atchafalaya Basin Louisiana Terrebonne Marshes Hydrodynamics Wax Lake Outlet Delta evolution Delta growth TABS-2 Computer program Numerical model Mathematical model Sediment transport Sedimentation Deposition Salinity Saltwater encroachment Geomorphology Verification Subsidence Donnell, Barbara Park Letter, Joseph V. Jr. The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes |
topic_facet |
Ingenieurwissenschaften (620) Atchafalaya River Atchafalaya River Delta Atchafalaya Basin Louisiana Terrebonne Marshes Hydrodynamics Wax Lake Outlet Delta evolution Delta growth TABS-2 Computer program Numerical model Mathematical model Sediment transport Sedimentation Deposition Salinity Saltwater encroachment Geomorphology Verification Subsidence |
description |
Source: https://erdc-library.erdc.dren.mil/jspui/ The Wax Lake Outlet and Atchafalaya River deltas in Louisiana have grown dramatically, and concern over the impact of this growth has led the US Army Corps of Engineers to conduct an investigation to predict how the deltas will evolve over the next 50 years. An additional task was to determine the impacts of that growth on navigation, flood control, salinity, and sedimentation in the bay area. The technical approach for this investigation builds upon the TABS-2 finite element numerical modeling system and is fully described in Report 11 of this series. Comparisons of the existing condition results with various alternatives are presented. In summary, the extension of the Avoca Island Levee to Beer Island (Reach 2) resulted in an approximate 8 percent increase in the predicted size of the 50-year delta evolution regardless of other constraints tested. For all alternatives tested, the size of the 50-year subaerial delta fell within the bounds of 56 to 144 square miles. The most extreme delta evolution simulation tested was the condition without the Wax Lake Outlet flow control project, no navigation channel dredging, and no levee extension. For all delta evolution simulations tested, the water surface elevations within areas east of the levee increased from 3.4 to 6.0 ft by year 2030. In each case tested, the Avoca Island Levee Extension to Reach 2 decreased the backwater effect of the 50-year delta by approximately 2 ft. |
author2 |
United States. Army. Corps of Engineers. New Orleans District. |
format |
Report |
author |
Donnell, Barbara Park Letter, Joseph V. Jr. |
author_facet |
Donnell, Barbara Park Letter, Joseph V. Jr. |
author_sort |
Donnell, Barbara Park |
title |
The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes |
title_short |
The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes |
title_full |
The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes |
title_fullStr |
The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes |
title_full_unstemmed |
The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes |
title_sort |
atchafalaya river delta. report 12: two-dimensional modeling of alternative plans and impacts on the atchafalaya bay and terrebonne marshes |
publisher |
U.S. Army Engineer Research and Development Center (ERDC) |
publishDate |
1992 |
url |
https://hdl.handle.net/20.500.11970/111966 |
long_lat |
ENVELOPE(-65.681,-65.681,-66.004,-66.004) |
geographic |
Beer Island |
geographic_facet |
Beer Island |
genre |
Beer Island |
genre_facet |
Beer Island |
op_relation |
http://hdl.handle.net/11681/13294 Technical Report HL-82-15 rept. 12 United States. Army. Corps of Engineers. New Orleans District. (Hg.) (1992): The Atchafalaya River Delta. Report 12: Two-Dimensional Modeling of Alternative Plans and Impacts on the Atchafalaya Bay and Terrebonne Marshes. Vicksburg, Mississippi: U.S. Army Engineer Research and Development Center (ERDC) (Technical Report, HL-82-15 rept. 12). https://hdl.handle.net/20.500.11970/111966 |
op_rights |
Alle Rechte vorbehalten |
op_doi |
https://doi.org/20.500.11970/111966 |
_version_ |
1772813444241686528 |