GeoSWMM Version 5.2

GeoSWMM for ArcGIS Pro version 5.2 was officially released on March 22, 2025. This release introduces a series of performance enhancements, bug fixes, and new features designed to improve the efficiency, usability, and hydrologic modeling capabilities of GeoSWMM within the ArcGIS Pro environment.

New Features

GeoSWMM for ArcGIS Pro

GeoSWMM is now fully integrated with ArcGIS Pro via a dedicated GeoSWMM tab on the ribbon interface. This streamlined provides direct access to hydrologic and hydraulic modeling tools, improving workflow efficiency within the ArcGIS Pro environment.

GeoSWMM 2D Modeling

GeoSWMM 2D, introduced in version 5.2 for ArcGIS Pro, extends integrated 1D–2D flood modeling capabilities. This release extends the EPA SWMM 5 by incorporating a quasi-2D approach for simulating detailed floodplain dynamics using 2D mesh structures.

2D Mesh Creation

Generate hexagonal mesh grids for the project area.

2D Nodes Creation

Automatically create 2D node points using the boundary layer, DEM, and optional obstruction layers.

2D Layer Creation

Build 2D network components (junctions, conduits, and cells) with auto-assigned layers and elevation data from DEM or nodes.

Connect 1D-2D Model

Link 1D (pipe network) models to 2D layers using mesh-generated components to enable coupled hydraulic simulation.

Flood Map Creation

Export maximum flood depth and WSE rasters following simulation for post-processing and map visualization.

GeoSWMM 2D supports detailed result visualization directly within ArcGIS Pro, displaying flood extent and depth using symbology, elevation raster, and spatial overlays.