US Army Corps of Engineers
Hydrologic Engineering Center

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Version 5.0.7 of the River Analysis System (HEC-RAS) is now available. This version supersedes Version 5.0.4, and all previous versions. The HEC-RAS 5.0.4 Supplemental User's Manual describes all of the new features that were added to version 5.0.4. The information contained in the Supplemental User's Manual supersedes the information in the HEC-RAS 5.0 User’s Manual. Version 5.0.4 of HEC-RAS includes the following new features (described in detail in the Supplemental User's Manual):

  1. Enhancements to Storage Area/Two-Dimensional Hydraulic Connections
  2. Variable Time Step Capabilities
  3. Internal Boundary Conditions Lines for Two-Dimensional Areas
  4. New Velocity Term for Two-Dimensional Flow Area Boundary Conditions, One- & Two-Dimensional Connections
  5. RAS Mapper Editing Tools
  6. New Transport Equation Calibration & Modification Options & Editor
  7. Variable Sediment Properties
  8. Lateral Weir Sediment Connection to a Two-Dimensional Area
  9. Quasi-Unsteady Internal Stage Boundary Conditions
  10. Sediment Parameters in the HEC-RAS Rules Editor

Other minor enhancements were also added. The development team has also continued careful and systematic testing of the software since the last release. The results of that testing in combination with reports from users has allowed the identification and repair of various problems. Some minor problems that did not affect results but caused problems in the software interface have been repaired without being specifically documented. For more information on What's New and Bug's fixed from the last version, see the HEC-RAS 5.0.7 Release Notes