What this Tutorial Covers

This tutorial serves as a hands-on guide for professionals using GeoSWMM 2D, with a focus on practical application in urban flood modeling. It is intended for users who already have a working knowledge of the 1D GeoSWMM model, as well as a fundamental understanding of hydrology, stormwater management, and EPA SWMM framework.

The tutorial walks users through the development of a 2D flood model for an urban watershed. It emphasizes key tasks such as preparing input data, configuring the 2D model, running simulations, and analyzing results, particularly the extent and depth of overland flooding. These skills are especially relevant for engineers and planners addressing challenges such as increased impervious surfaces, aging drainage systems, and intense rainfall events.

Users will learn how to interpret surface water behavior across a 2D computational grid, measure flood depths, and extract insights such as maximum water surface elevation (WSE) and inundation extent. This tutorial complements the GeoSWMM User Manual by offering a structured, example-driven walkthrough focused on real-world flood scenarios.

The following sections begin a step-by-step demonstration of a worked example project, guiding users through each stage of building and simulating a 2D urban flood model.