Overview of GeoSWMM 2D Modeling Approach

GeoSWMM 2D follows the Quasi-2D modeling approach that integrates the traditional one-dimensional (1D) and two-dimensional (2D) model using the same hydraulic computations done in SWMM. Users can prepare a terrain of the study area in a 2D fashion with a more detailed representation of the physical environment using high resolution elevation data while maintaining computational efficiency. This means GeoSWMM 2D is based on the principles of flow in open channels and pipes stretching the applications for flood modeling, stormwater management, river basin modeling, and other scenarios where both terrain detail and hydraulic accuracy are required.

This model assists in representing the topography of the area being studied in a 2D grid, and gives the flexibility to define the variations in elevation, land uses and hydrologic differences, and analyze the behavior-interaction- response of water flow between natural channels and flood plains. In this quasi-2D modeling framework, it couples 1D and 2D models with hydraulic interfaces like orifices, weirs or direct connection.

GeoSWMM 2D runs the model for user specified storm or flood event which quantifies the flow within the channels and transfers the flow to 2D grid to simulate the flow in the flood plain. It also helps to understand the extent of low-high water depth within the 2D grid, and offers to extract the maximum extent of inundation as well as maximum water surface elevation (WSE) across the 2D grid.