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This is the Calibration and Validation HUC08040202 Lower Ouachita-Bayou De Loutre (OL) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040202 OL HEC-RAS v6.3.1 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 3', 'Software', 'USACE']

This HUC08040304 Little (LI) HEC-RAS version 6.3.1 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the LI HEC-HMS Calibrated and Validated model and external inflows sourced from the Dugdemona (DU) HEC-RAS and Castor (CA) HEC-RAS model. The modeled streams include: Little River and unnamed tributaries, Flagon Bayou and unnamed tributaries, Haw Cr, Kitchen Creek and unnamed tributary, Dry Prong, Hemphill Creek and unnamed tributaries, Hair Creek, Big Creek, Trout Creek, Funny Lewis Bayou, Mills Bayou, Bushley Bayou, Wild Life Refuge streams, Catahoula Lake, Bear Creek, Indian Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Bryant Hammett & Associates in 2021, 2022, and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras']

This is the Calibration and Validation HUC08040303 Dugdemona (DU) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040303 DU HEC-RAS v6.3.1 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 2', 'Software', 'USACE']

The Design Storm Atlas 14 Everywhere (A14E) HUC08040207 Lower Ouachita (OU) HEC-RAS version 6.3 model was developed by Freese and Nichols, Inc. (FNI) as part of the Louisiana Watershed Initiative (LWI) modeling program and is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the OU HEC-HMS Atlas 14 Everywhere model and external inflows developed using gage information. The modeled streams include: Bayou de Siard, Bayou de Siard Tributary #2, Mill Bayou, Chauvin Bayou, Chauvin Bayou Tributary #1, Chauvin Bayou Tributary #2, Ouachita River, Mill Bayou, Black Bayou, Slough Bayou, Tupawek Bayou, Haha Bayou, Bayou Louis, Tiger Bayou, Bayou Falcon, Rawson Creek, Bushley Bayou, Cheniere Creek, Bryant Cranch, Longs, Creek, Booker Branch, Rogers Creek, Bayou Lapine, Steep Bayou. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet). Final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The Calibration and Validation events are also provided in this model for future user reference.

Keywords: ['6.3', 'HEC-RAS', 'Hydraulic', 'lwi', 'main', 'Model', 'modeling region 2', 'planning region 3', 'stem']

This Tangipahoa HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7', 'Tangipahoa']

This is the Calibration and Validation HUC08040302 Castor (CA) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040302 CA HEC-RAS v6.3.1 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 2', 'Software', 'USACE']

This Tickfaw HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'LWI', 'model', 'Region 7', 'Tickfaw']

The Mermentau Headwaters Numerical Model (MHNM) is a HEC-RAS model developed as part of the LWI effort based on the Mermentau Headwaters (08080201) HUC8. The modeled watershed comprises about 1,400 square miles area in the western area of the LWI Region 5. Two main waterways, Bayou Nezpique and Bayou Plaquemine Brule joins to form the Mermentau River near the watershed outlet. The Bayou des Cannes joins the Bayou Plaquemine Brule just upstream of the start of the Mermentau River. The MH watershed extends from Highway 165 to the northwest, past Interstate 10 to the south near Mermentau, and near Highway 190 at Opelousas to the east, covering portions of the Evangeline, Acadia, Allen, and Jefferson Davis Parishes. The model hydrologic inputs includes: boundary inflow hydrographs, precipitation, variable downstream boundary condition, and wind. The model has been calibrated and validated using 4 tropical and 4 non-tropical events. The events are: Hurricanes Barry, Delta, Gustav, and Laura and the October 2015, Aug 2016, May2017, and May2020 nontropical events. The model was developed in HECRAS version 6.3.1.

Keywords: ['6.4.1', 'Bayou Des Cannes', 'Bayou Nezpique', 'Bayou Plaquemine Brule', 'calibration', 'HEC-RAS', 'HUC 08080202', 'Hydraulic', 'hydraulic model', 'Mermentau Headwaters', 'Mermentau River', 'MHNM', 'Region 5', 'validation']

The Mermentau HUC8 Numerical Model (MENM) was a HEC-RAS model developed as part of the LWI effort based on the Mermentau (08080202) HUC8. The model extents include Bayou Queue de Tortue, the Gulf Intercoastal Waterway within the Mermentau Basin, Mermentau River, and coastline of Cameron and Vermillion Parishes. The total inflow to the Mermentau HUC8 is a combination of flow from Mermentau River and several bayous, including Bayou Lacassine, Bayou Grand Marais, Bayou Nezpique, Bayou des Cannes, Bayou Plaquemine Brule, and Bayou Queue de Tortue. The Mermentau River, downstream of the town of Mermentau, continues south and flows through Lake Arthur, Grand Lake, and Upper and Lower Mud Lakes before reaching its mouth at the Gulf of Mexico. Approximately 86 percent of the Mermentau HUC8 watershed, generally downstream of the Cameron Parish and Vermilion Parish boundary lines, is within the CPRA Coastal Transition Zone (CTZ). The model hydrologic inputs includes: boundary inflow hydrographs, precipitation, variable downstream boundary condition, and wind. The model calibration and validation uses 4 tropical and 4 non-tropical events, however, did not meet GMM calibration standards due to the lack of gage data. The events are: Hurricanes Barry, Gustav, Delta, and Laura and the October 2015, Aug 2016, May 2020 and May 2017 nontropical events. The model was developed in HECRAS version 6.4.1.

Keywords: ['6.4.1', 'August 2016', 'hec', 'HEC-RAS', 'HUC 08080202', 'Hurricane Barry', 'Hurricane Delta', 'Hurricane Gustav', 'Hurricane Laura', 'Hydraulic', 'LWI', 'May 2017', 'May 2020', 'MENM', 'Mermentau', 'Mermentau River', 'Mermentau River HUC8 (ME) Region 5', 'model', 'October 2015', 'Rain-on-grid', 'ras', 'Region 5', 'Validation']

This HUC08040202 Lower Ouachita - Bayou De Loutre (OL) HEC-RAS version 6.3.1 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the OL HEC-HMS Calibrated and Validated model and external inflows sourced from the USACE Ouachita CWMS HEC-RAS model and Bayou Bartholomew (BW) HEC-RAS model. The modeled streams include: Ouachita River, Bayou De Loutre, Bayou De Butte, Big Creek, Frank Lapere Creek, Rock Creek, Shiloh Creek, and Williamson Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Bryant Hammett & Associates in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras']

This is the Calibration and Validation HUC08040207 Lower Ouachita (OU) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040207 OU HEC-RAS v6.3 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 3', 'Software', 'USACE']

This model represents the detailed region of the Toledo Bend watershed (HUC 12010004) and inflow to Toledo Bend within Region 4 of the Louisiana Watershed Initiative (LWI) Statewide Data and Modeling Program. It is a 1D HEC-RAS model that handles the hydraulic components of the simulations. This model was developed in conjunction with the HEC-HMS models of the watershed. The model includes all storm events designated in the Region 4, Task Order 2 work plan. The model was calibrated to the March 2016 and October 2009 storm events. The model was validated using the March 2018 and Harvey storm events. Note: Some common input files referenced by this dataset may be provided through the watershed's Supporting Files dataset that is the linked in the watershed's package.

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'model', 'ras', 'Region 4', 'Region 4 Toledo Bend 1D HEC-RAS Model']

This Liberty Bayou-Tchefuncta HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'Liberty Bayou-Tchefuncta', 'LWI', 'model', 'ras', 'Region 7']

This Bayou Sara-Thompson (Bayou Sara) HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'Bayou Sarah-Thompson', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7']

This Lake Maurepas HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'LWI', 'Maurepas', 'model', 'Region 7']

This Bayou Sara-Thompson (Bayou Baton Rouge) HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'Bayou Sarah-Thompson', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7']

This Lower Pearl HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'Lower Pearl Watershed', 'LWI', 'model', 'ras', 'Region 7']

This is the Calibration and Validation HUC08040205 Bayou Bartholomew (BW) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040205 BW HEC-RAS v6.3.1 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 3', 'Software', 'USACE']

This Lake Maurepas (West) HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'Maurepas West Model', 'model', 'ras', 'Region 7']

This is the Calibration and Validation HUC08040206 Bayou D'Arbonne (AR) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040206 AR HEC-RAS v6.3 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 3', 'Software', 'USACE']

This Bayou Sara-Thompson (Tunica Swamp) HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'Bayou Sarah-Thompson', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7']

This Bogue Chitto HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'Bogue Chitto Watershed', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7']

This Amite HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 9. The terrain used for modeling primarily sources the 2018 Department of Transportation and Development Amite LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'Amite', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'LWI', 'model', 'Region 9']

The Design Storm Atlas 14 Everywhere (A14E) HUC08040207 Lower Ouachita (OU), Bayou De Siard area HEC-RAS version 6.3 model was developed by Freese and Nichols, Inc. (FNI) as part of the Louisiana Watershed Initiative (LWI) modeling program and is located in the LWI modeling Region 2. This model represents a complex area, Bayou De Siard, located within the Lower Ouachita HUC8. It leverages internal and exteranal inflows developed by the OU HEC-HMS Atlas 14 Everywhere model . The modeled streams include: Bayou de Siard, Bayou de Siard Tributary #2, Mill Bayou, Chauvin Bayou, Chauvin Bayou Tributary #1, Chauvin Bayou Tributary #2. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet). Final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The Calibration and Validation events are also provided in this model for future user reference.

Keywords: ['6.3', 'Bayou De Siard', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras']

This Tickfaw 1D HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7', 'Tickfaw']

The Mermentau Headwaters (MH) watershed is described by a set of distinct hydrologic and hydraulic models. The hydrologic model areas are predominately in the upper portions of the watershed, with a total area of about 1,400 square miles area in the western area of the LWI Region 5. Two main waterways, Bayou Nezpique and Bayou Plaquemine Brule joins to form the Mermentau River near the watershed outlet. The Bayou des Cannes joins the Bayou Plaquemine Brule just upstream of the start of the Mermentau River. The MH watershed extends from Highway 165 to the northwest, past Interstate 10 to the south near Mermentau, and near Highway 190 at Opelousas to the east, covering portions of the Evangeline, Acadia, Allen, and Jefferson Davis Parishes. The Hydrologic Modeling System (HEC-HMS) is designed to simulate the complete hydrologic processes of dendritic watershed systems. The software includes many traditional hydrologic analysis procedures such as infiltration, unit hydrographs, and hydrologic routing. The Mermentau Headwaters HUC8 Hydrologic Models (MHHM) were developed as part of the LWI Region 5 modeling project.

Keywords: ['4.11', 'Bayou Des Cannes', 'Bayou Nezpequie', 'Bayou Plaqumine Brule', 'HEC-HMS', 'HUC 08080202', 'hydrologic model', 'Hydrological', 'hydrology', 'LWI', 'Mermentau Headwaters', 'MHHM', 'MHNM', 'Region 5']

This is the Calibration and Validation HUC08040304 Little (LI) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040304 LI HEC-RAS v6.3.1 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 2', 'Software', 'USACE']

This Lower Pearl HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'Lower Pearl Watershed', 'LWI', 'model', 'Region 7']

This is the Calibration and Validation HUC08040301 and HUC08040305 Lower Red/Black (LRBK) HEC-HMS v4.9 model developed by Freese and Nichols, Inc. (FNI) for the Louisiana Watershed Initiative (LWI). This model leverages observed rainfall data and produces flow hydrographs to be used in the HUC08040301 and HUC08040305 (LRBK) HEC-RAS v6.3.1 calibration and validation model. The model covers the entire HUC8 and used the vertical datum NAVD88 and the Albers Conical Equal Area D_North American_1983 projection.

Keywords: ['Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'lwi', 'Model', 'modeling region 2', 'planning region 2', 'Software', 'USACE']

This Bogue Chitto HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'Bogue Chitto Watershed', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'LWI', 'model', 'Region 7']

This Tickfaw 2D HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7', 'Tickfaw']

This HUC08040205 Bayou Bartholomew (BW) HEC-RAS version 6.3.1 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the BW HEC-HMS Calibrated and Validated model. The downstream boundary condition is a calibrated normal depth. The modeled streams include: Bayou Bartholomew, Horse Bayou, Cypress Bayou, Bayou De Glaize, and Chemin-A-Haut Bayou. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Bryant Hammett & Associates in 2021, 2022, and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras']

This Bayou Sara-Thompson (Thompson Creek) HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'Bayou Sarah-Thompson', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 7']

This HUC08040301 and HUC08040305 Lower Red/Black (LRBK) HEC-RAS version 6.3.1 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the LRBK HEC-HMS Calibrated and Validated model, external inflows sourced from the Little (LI) and Lower Ouachita (OU) HEC-RAS models, and gage information. The modeled streams include: Bayou Maria, Brushy Fork, Red River, Black River, Catahoula Lake Diversion Canal (CLDC). The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by GOTECH, Inc. in 2022 and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras']

This HUC08040303 Dugdemona (DU) HEC-RAS version 6.3.1 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the DU HEC-HMS Calibrated and Validated model. The modeled streams include: Dugdemona River and tributaries, Shepherd Creek and tributaries, Cypress Bayou, Madden Creek, Redwine Creek and tributaries, Little Dugdemona River, Big Creek, Kyiaies Creek, Sonnett Creek, Port de Luce Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras']

This HUC08040302 Castor (CA) HEC-RAS version 6.3.1 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the CA HEC-HMS Calibrated and Validated model. The modeled streams include: Castor Creek, Hurricane Creek, Bushy Creek, Beaucoup Creek, Chickasaw Creek, Sandy Creek, Flat Creek, Beech Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2022 and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras']

This HUC08040206 Bayou D'Arbonne (AR) HEC-RAS version 6.3 model was developed by Freese and Nichols, Inc. (FNI) for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. This model is located in the LWI modeling Region 2. This is a 1D-2D model that leverages internal inflows developed by the AR HEC-HMS Calibrated and Validated model. The modeled streams include: Bayou D'Arbonne, Middle Fork Bayou D'Arbonne, Corney Bayou, Cypress Creek, Little Corney, Beever Creek, Stowe Creek, Big Creek, Bayou Choudrant, Choudrant Creek, Fourmile Creek, Mill Creek, Colvin Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3', 'hec', 'HEC-RAS', 'Hydraulic', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras']

This Bayou Sara-Thompson HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'Bayou Sara-Thompson', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'LWI', 'model', 'Region 7']

This Tangipahoa HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'LWI', 'model', 'Region 7', 'Tangipahoa Watershed']

This Liberty Bayou-Tchefuncta HEC-HMS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['4.11', 'hec', 'HEC-HMS', 'hms', 'Hydrological', 'hydrology', 'Liberty Bayou-Tchefuncta', 'LWI', 'model', 'Region 7']

This Lake Maurepas (Pass Manchac) HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 7. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'Maurepas Pass Manchac Model', 'model', 'ras', 'Region 7']

This model is the calibrated hydrological HEC-HMS model for the Louisiana Watershed Inititative (LWI) pilot study conducted for quantifying compound flood hazard in regions near the coastline, where both riverine and coastal flood drivers are significant contributors to total flood hazard, known as the transition zone (TZ). The procedure to quantify compound flood hazard involves 1) developing numerical models capable of simulating rainfall-runoff and coastal hydrodynamic processes, 2) generating a set of tropical storms and non-tropical storms (i.e., all storm types other than tropical storms, which include extratropical cyclones, frontal storms, and convective storms) representative of compound flooding conditions in the basin(s) of interest, 3) simulating storms incorporating a range of compound flooding conditions using the numerical models, and 4) leveraging Joint Probability Method – Optimal Sampling (JPM-OS) and extreme value analysis (EVA) methods to assess water level recurrence intervals for tropical and non-tropical events respectively. The procedures documented within the LWI pilot study memoranda balance rigor with computational efficiency to produce a set of annual exceedance probability (AEP) water surface elevations within the basin(s) of interest. Once methods are finalized, water level AEPs and other model data could be used to inform planning and design activities in the coastal and compound flood transition zone. This LWI Amite Calibrated HEC-HMS Model is meant to address item 1) in the paragraph above for hydrological modeling. The outputs from this model are used in the LWI Amite HEC-RAS Model. The hydrologic and hydraulic model calibration and validation tests assessed model performance relative to observations from a suite of six storms: Hurricane Katrina (2005), Hurricane Gustav (2008), Hurricane Isaac (2012), Hurricane Barry (2019), and two non-tropical storms from March and August 2016, respectively. Performance was assessed using quantitative metrics including mean volume bias, Nash-Sutcliffe efficiency, and root-mean-square error (RMSE), as recommended by Moriasi et al. (2007). Source: MODEL CALIBRATION AND VALIDATION - AMITE RIVER BASIN PILOT STUDY TECHNICAL MEMORANDUM The Water Institute, Hugh Roberts, Brendan Yuill, Nate Young, et. al. (2021)

Keywords: ['Amite', 'calibration', 'Frequency', 'HEC', 'hec-hms', 'HMS', 'Hydrology', 'LWI', 'Model', 'pilot study', 'Software', 'USACE', 'validation']

This Amite HEC-RAS was developed by Dewberry Engineers Inc. for calibration and validation as part of the Louisiana Watershed Initiative (LWI) modeling program. The model is located in LWI Region 9. The terrain used for modeling primarily sources the 2018 Department of Transportation and Development Amite LiDAR. The model and terrain vertical datum is referenced to NAVD88 feet and the horizontal datum is referenced to the NAD1983 State Plane Louisiana South FIPS 1702 (US Feet).

Keywords: ['6.3.1', 'Amite', 'hec', 'HEC-RAS', 'Hydraulic', 'LWI', 'model', 'ras', 'Region 9']

This package consolidates the HUC08040303 - Dugdemona (DU) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Dugdemona - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Dugdemona - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The Redwine Creek Proof of Concept model is a breakout model of the Dugdemona design storm model. It is provided in this package as well. The modeled streams include: Dugdemona River and tributaries, Shepherd Creek and tributaries, Cypress Bayou, Madden Creek, Redwine Creek and tributaries, Little Dugdemona River, Big Creek, Kyiaies Creek, Sonnett Creek, Port de Luce Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras', 'Software', 'USACE']

This package consolidates the HUC08040301 and HUC08040305 - Lower Red/Black (LRBK) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Lower Red/Black - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Lower Red/Black - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The modeled streams include: Bayou Maria, Brushy Fork, Red River, Black River, Catahoula Lake Diversion Canal (CLDC). The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by GOTECH, Inc. in 2022 and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras', 'Software', 'USACE']

This package consolidates the HUC08040302 - Castor (CA) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Castor - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Castor - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The Hurricane Creek Proof of Concept model is a breakout model of the Castor Creek design storm model. It is provided in this package as well. The modeled streams include: Castor Creek, Hurricane Creek, Bushy Creek, Beaucoup Creek, Chickasaw Creek, Sandy Creek, Flat Creek, Beech Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2022 and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras', 'Software', 'USACE']

TheTickfaw Watershed package contains all available models associated with the LWI R7Tickfaw Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model

Keywords: ['4.11', '6.3.1', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'LWI', 'model', 'ras', 'Region 7', 'Tickfaw']

The Bogue Chitto Watershed package contains all available models associated with the LWI R7 Bogue Chitto Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model

Keywords: ['4.11', '6.3.1', 'Bogue Chitto Watershed', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'LWI', 'model', 'ras', 'Region 7']

This package consolidates the HUC08040207 - Lower Ouachita (OU) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Lower Ouachita - Main Stem: Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative," "Lower Ouachita - Bayou De Siard: Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative," and "Lower Ouachita - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. The Lower Ouachita HEC-HMS Design Storm model covers the full extent of HUC08040207 and includes design storm events. The Lower Ouachita HEC-HMS Calibration and Validation model covers the full extent of HUC08040207 and includes calibration and validation events. The Lower Ouachita - Main Stem HEC-RAS Design Storm model covers the lower portion of HUC08040207 and includes design storm events as well as calibration and validation events. The Lower Ouachita - Bayou Desiard HEC-RAS Design Storm model covers the upper portion of HUC08040207 and includes design storm events as well as calibration and validation events. The Lonewa Creek Proof of Concept model is a breakout model of the Castor Creek design storm model. It is provided in this package as well. The modeled streams include: Bayou de Siard, Bayou de Siard Tributary #2, Mill Bayou, Chauvin Bayou, Chauvin Bayou Tributary #1, Chauvin Bayou Tributary #2, Ouachita River, Mill Bayou, Black Bayou, Slough Bayou, Tupawek Bayou, Haha Bayou, Bayou Louis, Tiger Bayou, Bayou Falcon, Rawson Creek, Bushley Bayou, Cheniere Creek, Bryant Cranch, Longs, Creek, Booker Branch, Rogers Creek, Bayou Lapine, Steep Bayou. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3', 'Bayou De Siard', 'Frequency', 'hec', 'hec-hms', 'HEC-RAS', 'hms', 'Hydraulic', 'hydrology', 'lwi', 'main', 'model', 'modeling region 2', 'planning region 3', 'ras', 'Software', 'stem', 'USACE']

This package includes all models that represent the Toledo Bend Watershed (HUC 12010004) within Region 4 of the Louisiana Watershed Initiative (LWI) Statewide Data and Modeling Program. Each model has four versions: Historic Storms, Atlas 14 Everywhere (A14E) Design Storms, Atlas 14 Everywhere with Areal Reduction Factors (A14EwARF) Design Storms, and Simplified Storm Transposition (SST) Design Storms. Toledo Bend was modeled with HEC-HMS and 1D HEC-RAS.

Keywords: ['6.3.1', 'hec', 'hec-ras', 'hydraulic', 'model', 'ras', 'Region 4', 'Region 4 Toledo Bend 1D HEC-RAS Model']

The Bayou Sara-Thompson Watershed package contains all available models associated with the LWI R7 Bayou Sara-Thompson Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model

Keywords: ['4.11', '6.3.1', 'Bayou Sara-Thompson', 'Bayou Sarah-Thompson', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'LWI', 'model', 'ras', 'Region 7']

The Amite Watershed package contains all available models associated with the LWI R9 Amite Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model

Keywords: ['4.11', '6.3.1', 'Amite', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'LWI', 'model', 'ras', 'Region 9']

This package consolidates the HUC08040304 - Little (LI) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Little - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Little - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The modeled streams include: Little River and unnamed tributaries, Flagon Bayou and unnamed tributaries, Haw Cr, Kitchen Creek and unnamed tributary, Dry Prong, Hemphill Creek and unnamed tributaries, Hair Creek, Big Creek, Trout Creek, Funny Louis Bayou, Mills Bayou, Bushley Bayou, Wild Life Refuge streams, Catahoula Lake, Bear Creek, Indian Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Bryant Hammett & Associates in 2021, 2022, and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 2', 'ras', 'Software', 'USACE']

The Lower Pearl Watershed package contains all available models associated with the LWI R7 Lower Pearl Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model.

Keywords: ['4.11', '6.3.1', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'Lower Pearl Watershed', 'LWI', 'model', 'ras', 'Region 7']

This package consolidates the HUC08040202 Lower Ouachita - Bayou De Loutre (OL) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Lower Ouachita - Bayou De Loutre - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Lower Ouachita - Bayou De Loutre - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The modeled streams include: Ouachita River, Bayou De Loutre, Bayou De Butte, Big Creek, Frank Lapere Creek, Rock Creek, Shiloh Creek, and Williamson Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Bryant Hammett & Associates in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras', 'Software', 'USACE']

This package consolidates the HUC08040205 - Bayou Bartholomew (BW) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recommended to use the final LWI base models: "Bayou Bartholomew - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Bayou Bartholomew - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr events. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The Bayou Bartholomew Proof of Concept HEC-RAS model uses the design storm HEC-RAS model as a base model; it is also provided in this package. The modeled streams include: Bayou Bartholomew, Horse Bayou, Cypress Bayou, Bayou De Glaize, and Chemin-A-Haut Bayou. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Bryant Hammett & Associates in 2021, 2022, and 2023. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3.1', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras', 'Software', 'USACE']

The Lake Maurepas Watershed package contains all available models associated with the LWI R7 Lake Maurepas Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model

Keywords: ['4.11', '6.3.1', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'LWI', 'Maurepas', 'Maurepas Pass Manchac Model', 'Maurepas West Model', 'model', 'ras', 'Region 7']

This package consolidates the HUC08040206 - Bayou D'Arbonne (AR) Louisiana Watershed Initiative modeling program and related data that was developed by Freese and Nichols, Inc. (FNI). For project planning and design, it is recomended to use the final LWI base models: "Bayou D'Arbonne - Design Storm Atlas 14 Everywhere HEC-RAS Model for Louisiana Watershed Initiative" and "Bayou D'Arbonne - Design Storm HEC-HMS Model for Louisiana Watershed Initiative." Within the HEC-RAS design storm model, final design storm plans are provided for the 35 design storm frequency (5-year, 10-year, 25-year, 50-year, 100-year, 200-year, 500-year) and duration combinations (6-hr, 12-hr, 24-hr, 48-hr, 72-hr). The critical duration is 24-hr, and the associated plans are recommended for design. Results rasters are provided for each of the 24 hr event. These rasters were created by running the 24-hr event in HEC-RAS and exporting the WSE, Depth and Velocity rasters. The depth rasters created from the design storm models were used in the provided Go-Consequences consequence analyses. The Go-Consequences analysis was verified using select events in the consequence analysis software HEC-FIA; these results are also provided. Calibration and Validation models are provided in this package for reference. The modeled streams include: Bayou D'Arbonne, Middle Fork Bayou D'Arbonne, Corney Bayou, Cypress Creek, Little Corney, Beever Creek, Stowe Creek, Big Creek, Bayou Choudrant, Choudrant Creek, Fourmile Creek, Mill Creek, Colvin Creek. The terrain used for modeling primarily sources the 2021 Department of Transportation and Development LiDAR with bathymetry incorporated from surveys conducted by Nixon Engineering in 2021 and 2022. The model and terrain use the vertical datum NAVD88 and the State-Plane projection NAD 1983 (2011) State Plane Louisiana North FIPS 1701 (US Feet).

Keywords: ['6.3', 'Frequency', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'hydrology', 'lwi', 'model', 'modeling region 2', 'planning region 3', 'ras', 'Software', 'USACE']

The Tangipahoa Watershed package contains all available models associated with the LWI R7 Tangipahoa Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model

Keywords: ['4.11', '6.3.1', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'LWI', 'model', 'ras', 'Region 7', 'Tangipahoa', 'Tangipahoa Watershed']

This package includes all models that represent the Mermentau watershed (HUC 08080201) within Region 5 of the Louisiana Watershed Initiative (LWI) Statewide Data and Modeling Program. Each model was devloped for Historical Storms and Key Cumulative Drainage Areas Design Storms. Mermentau Headawaters was modeled with HEC-HMS and 2D HEC-RAS.

Keywords: ['4.11', '6.4.1', 'Bayou Des Cannes', 'Bayou Nezpequie', 'Bayou Nezpique', 'Bayou Plaquemine Brule', 'Bayou Plaqumine Brule', 'calibration', 'HEC-HMS', 'HEC-RAS', 'HUC 08080202', 'Hydraulic', 'hydraulic model', 'hydrologic model', 'Hydrological', 'hydrology', 'LWI', 'Mermentau Headwaters', 'Mermentau River', 'MHHM', 'MHNM', 'Region 5', 'validation']

The Liberty Bayou-Tchefuncta Watershed package contains all available models associated with the LWI R7 Liberty Bayou-Tchefuncta Watershed modeling effort as part of TO4. This includes the HEC-HMS Model, HEC-RAS Model, HEC-FIA Model, and the Go-Consequence Model.

Keywords: ['4.11', '6.3.1', 'hec', 'hec-hms', 'hec-ras', 'hms', 'hydraulic', 'Hydrological', 'hydrology', 'Liberty Bayou-Tchefuncta', 'LWI', 'model', 'ras', 'Region 7']

This package includes all models that represent the Mermentau watershed (HUC 08080202) within Region 5 of the Louisiana Watershed Initiative (LWI) Statewide Data and Modeling Program. Each model was devloped for Historical Storms and Key Cumulative Drainage Areas Design Storms. Mermentau was modeled with 2D HEC-RAS.

Keywords: ['6.4.1', 'August 2016', 'hec', 'hec-ras', 'HUC 08080202', 'Hurricane Barry', 'Hurricane Delta', 'Hurricane Gustav', 'Hurricane Laura', 'hydraulic', 'LWI', 'May 2017', 'May 2020', 'MENM', 'Mermentau', 'Mermentau River', 'Mermentau River HUC8 (ME) Region 5', 'model', 'October 2015', 'Rain-on-grid', 'ras', 'Region 5', 'Validation']