Section 1 Overview

1.1 2023-03 Release

The 2023-03 Release is a major release that introduces new features and offers significant improvements to the existing sub-grid sampling functionality. A range of general new features, enhancements and bug fixes are also included. These include:

  • New GIS Vector file format – GeoPackage
  • New GIS Raster file formats – GeoTIFF and GeoPackage
  • Layered interflow (Sub-Surface) Flows
  • Sub-Grid Sampling (SGS) improvements
  • 2D bridge modelling enhancements
  • 2D weir flow enhancements

EPA SWMM Linking to TUFLOW: TUFLOW linkage with 1D EPA SWMM has been added as supported functionality in the 2023-03-AD release. TUFLOW-SWMM tutorials are available from the TUFLOW Wiki. The TUFLOW Wiki now also contains XPSWMM to TUFLOW-SWMM model conversion advice alongside our other model conversion pages (FLO2D to TUFLOW, Flood Modeller to TUFLOW, HEC-RAS to TUFLOW, InfoWorks ICM to TUFLOW, MIKE Flood to TUFLOW).

A new Chapter in this document (Section 4) details this TUFLOW-SWMM functionality.

As always, it is recommended that when switching to a new build with an established model, test runs are carried out and comparisons made between the old and new builds (subtracting the two maximum water level (h) data sets and reviewing any differences is an easy way to do this). If you have any queries on the comparison, or require clarification or more detail on any of the points below, please email