Message from HEC on the new release of HEC-RAS version 5.0.4. Make sure to also check on the new Verification/Validation and the Benchmarking documents.
***Note. If you originally downloaded 5.0.4 before May 4 at 4:00 pm PDT then please redownload and install from the links below. There were some minor errors found in the original release.
***Note. If you originally downloaded 5.0.4 before May 4 at 4:00 pm PDT then please redownload and install from the links below. There were some minor errors found in the original release.
Download HEC-RAS Version 5.0.4 here:
Download RD-52 HEC-RAS
Verification and Validation Tests document here:
Download RD-51 Benchmarking
of the HEC-RAS Two-Dimensional Hydraulic Modeling Capabilities here:
There are several other new useful documents related to HEC-RAS here:
http://www.hec.usace.army.mil/software/hec-ras/documentation.aspx
http://www.hec.usace.army.mil/software/hec-ras/documentation.aspx
From HEC:
We have released the final version of HEC-RAS 5.0.4 today. It is now
available for download from our webpage at the link below. I have
enclosed the 5.0.4 release notes for your review. I have also
included a separate document that describes how to use the new features
contained in this version. Additionally I have also included a document
on how to spec out a computer for doing 2D modeling with HEC-RAS.
We hope you enjoy the new version of the software. As always, please keep
us informed on any bugs you find, or your ideas for new features. Here is
the link to the HEC-RAS 5.0.4 web page:
The following is a list of the major new features you can read about in the Release
Notes and the Supplemental User’s Manual:
- New
RAS Mapper Pre-Processor Tools
- Variable
Time Step Capabilities (improved accuracy and faster run times)
- Increased
Computational Speed for 2D Computations (2 to 5 times faster run times)
- Enhancements
to SA/2D Hydraulic Connections
- New
2D Polygon Mesh Refinement Tool
- Internal
Boundary Condition Lines for 2D Areas
- New
Velocity Term for 2D Flow Area Boundary Conditions
- 64–bit
Version of RAS Mapper and 64-bit 2D Pre-Processor (RAS now can handle much
larger 2D models)
- Improved
Terrain Generation Utility
- Improved
Manning’s n Layer Development
- Sediment
– New Options in the User Defined Grain Class Editor
- Sediment
– New Transport Function Calibration Options
WARNING: Some of the bug fixes “may” cause the
computed results from 5.0.3 to 5.0.4 to change. Please read the Release
Notes carefully for information about these changes.
There are two new verification and validation documents
for HEC-RAS now available on our web page in the HEC-RAS area. Here is a
short description of each:
- RD-52 HEC-RAS
Verification and Validation Tests (Enclosed in this email)
This is the first ever full blown Verification and Validation document for
HEC-RAS. In this report we compare HEC-RAS to: analytical and text book
data sets; lab studies, and real world flood events with good observed
data. This report covers 1D steady flow; 1D unsteady flow, and 2D
unsteady flow computations. The report verifies that HEC-RAS correctly
solves the equations used in each of these computational frameworks, and it
verifies that HEC-RAS can be used for a very wide range of riverine modeling
conditions. It can aslo be download here:
- RD-51 Benchmarking
of the HEC-RAS Two-Dimensional Hydraulic Modeling Capabilities
This research document
summarizes how the Hydrologic Engineering Center's (HEC) River Analysis System
(HEC-RAS) software performed in the two-dimensional (2D) modeling benchmark
tests developed by the United Kingdom's (UK) Joint Defra (Department for Environmental
Food and Rural Affairs) Environment Agency. This is an updated version of
this report that we previously developed. We re-ran all of the test, plus
one new test, with version 5.0.4 of HEC-RAS. The results are even better
than before, and the HEC-RAS computational speed is much faster than previously
document. This report can be downloaded from our web page at the
following link:
