GeoSWMM Tools
The GeoSWMM Tools is a set of dynamic tools that enable the user to calculate several input properties for a SWMM model. These properties are associated with the physical and hydrologic characteristics of the subcatchments and conduits in a model. These tools efficiently prepare and manage these data, which can then be assigned to the respective SWMM object property fields during model building. Along with these pre-processing tools, GeoSWMM integrates some post-processing tools. The current version of the GeoSWMM (v 5. 0) also integrates the 2D modeling approach and respective pre-processing tools to prepare the 2D network. A separate chapter has been included in this version elaborating on the GeoSWMM 2D modeling tools. Here in this chapter, all the pre-processing tools that are integrated with GeoSWMM to process and prepare input data, and some of the post-processing tools help to visualize the model results with their inherent capabilities.
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Table 12: Summary of the GeoSWMM Tools and their Applications
| Tool Type | Pre-processing Tools | Object Category | Calculated Properties |
|---|---|---|---|
| Pre-processing Tools | Watershed Delineation Tool | Subcatchment | Subcatchment shape and area, and subcatchment outlet position |
| Watershed Delineation Tool | Conduit | Conduit (open channel) shape and length | |
| Link Inlet-Outlet Assignment Tool | Conduit | Conduit Inlet and Outlet Nodes Name | |
| Network Analysis Tool | Conduit, Junction | Network connectivity check | |
| Slope Calculation | Subcatchment | Average surface slope in percentage | |
| Imperviousness Calculation | Subcatchment | Percentage of impervious area | |
| Width Calculation | Subcatchment | Characteristic width of overland flow-path | |
| Land Use Properties | Land Use | Land Use reclassification | |
| Land Use Properties | Subcatchment | Manning's roughness coefficient for impervious and pervious area; Depth of depression storage for impervious and pervious area | |
| Conduit Roughness | Conduit | Manning's roughness coefficient | |
| Post-processing Tools | Object Category | Functionalities | |
| Post-processing Tools | Extract Elevation Data | Conduit, Junction | Extract elevation data and show Ground Level at the Profile Plot View. |
| Flood Mapping Tool | Inundation Depth and Flood Boundary Layer | Generates Flood Boundary Layer based on GeoSWMM 1D simulation. |