LWI Region 3 Modeling Overview

BOEUF

MACON TENSAS

COCODRIE

3.6.2 Macon a. Hydrologic Model (HEC-HMS) HEC-HMS was used to model the Arkansas headwater portion of the Bayou Macon Watershed, and the results were used as an inflow boundary condition for the Bayou Macon 2D ROM HEC-RAS model.

LEARN MORE (M, APPENDIX 1).

Macon Arkansas Basin

BAYOU MACON ARKANSAS HEC-HMS MODELED AREA: 492 sq. mi. MODEL INFORMATION: 39 subbasins and 24 reaches. Figure 3-28 depicts the location of the watershed, the elements that make up the model, and the relevant gages. Rain-to-Runoff Transform The ModClark Transform method was used as previously discussed in Rainfall-Runoff Transformation . More information can be found in the Macon report: LEARN MORE: M, APPENDIX 1, 1.1.5 + Reach Routing For reach routing, the Modified Puls (ModPuls) method was used as previously discussed in Reach Routing Methods. More information can be found in the Macon report: LEARN MORE: M, APPENDIX 1, 1.1.7 + Loss Method For the soil losses, the Deficit and Constant method was used as previously discussed in Loss Method. More information can be found in the Macon report: LEARN MORE: M, APPENDIX 1, 1.1.4 +

Figure 3-28: Location of the Bayou Macon Arkansas model with outflow gage locations.

Groundwater The Linear Reservoir Baseflow method was used as previously discussed in Baseflow Representation . More information can be found in the Macon report: LEARN MORE: M, APPENDIX 1, 1.1.6 +

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LWI REGION 3 TRAINING

LOUISIANA WATERSHED INITIATIVE