Enabling GeoSWMM 2D Modeling
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Click the 2D Modeling dropdown from the GeoSWMM menu bar
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Click the Enable 2D Modeling option.

Tips Once the user enables 2D modeling, the 1D GeoSWMM project database will be converted to a 2D project within the same workspace. It is recommended to keep a copy of the original GeoSWMM 1D project using the available “Save a copy” option from project menu before enabling 2D modeling. This precaution ensures that you have a backup of the 1D model, as the GeoSWMM 2D doesn’t allow users to go back to the native 1D model. ![]() |
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Boundary Layer
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Junctions 2D
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Conduits 2D
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Cells 2D
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Orifices 2D
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Weirs 2D

Fig.143: GeoSWMM Model Object Panel and Layers list in TOC for 2D Modeling