Download Hec Ras 4.1

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HEC-RAS download. Performs steady and unsteady flow calculations. Download Review Comments Questions & Answers (2) Download the latest version from the developer's.

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HEC-RAS 4.0 beta See all The primary goal of HEC is to support the nation in its water resources management responsibilities by increasing the Corps technical capability in hydrologic engineering and water resources planning and management.
Army Corps of Engineers' HEC-RAS program, version 4.1.0 must be installed on the computer. Note that HEC-RAS project files created from other versions of HEC-RAS can be used in cHECk-RAS. However, in order for the program to function correctly, HEC-RAS version 4.1.0 must be installed.

Project description

PyRAS - Python for River AnalysiS

DISCLAIMER

This module is under development and is considered a beta-release (not suitable for production use yet).The API will most likelly change during this development process with the help of any feedback received frompotential beta testers.

Description

A Python suite for working with river models.

Goals

Offer an abstraction layer for the definition of river models and tools to operate on this modelsor when possible calling the model engine (controller). So far the library offers:

HEC-RAS: Wrapper for the COM interface of the HEC-RAS controller. (windows only)

For the upcoming developments this library will define a pythonic interface to different objectsfound in the HEC-RAS river model (sections, structures, nodes etc).

Requirements

This package depends on pywin32 for accessing the HECRASController interface.

Additionally, you need to have a working version of HEC-RAS installed.Current support includes version 4.1.0 and 5.0.0.

Installation

The easy way:

Hec Ras Latest Version

Install the anaconda distribution (comes with PyWin32 preinstalled)
On the command line type:

The hard way:

Install python
Download pywin32 installer from the project webpage and install.
On the command line type:

License

Status

This is a project under development and is currently in beta testing.

Although the project should be compatible with python versions 2.6, 2.7, 3.1,3.2, 3.3 and 3.4, the project will only provide testing for 2.7, 3.3 and 3.4

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Hec Ras Software

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Files for PyRAS, version 0.2.1
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Hec-ras 4.1.0 software, free download

Civil 3D with HEC-RAS

2013.03.26 - Effectiveas of today, Halff is no longer selling / issuing licences of the HEC-RASFlipper. Over the last year, we appreciate the wide array of interest and apologizeif this causes you any inconvenience.

The routine inside Civil3D assumes that the hydraulic sections are for a roadway. Roadway designers assume that roadway sections are from right to left looking in the direction of increasing station. Hydraulic engineers assume that a cross section in a hydraulic model is looking left to right looking downstream. Hydraulic engineers also assume that the stationing decreases as you look downstream. This causes Civil3D to export a hydraulic model that is 'flipped' according to the standard HEC-RAS modeling nomenclature.

To correct and 'flip' the exported Civil3D HEC-RAS file from roadway to floodplain direction, Halff Associates has written a program that corrects this issue.

This program requires a unique key, to be provided by Halff Associates, for each machine that it is installed on. Once installed, click the register button to request your password. Note: As of March 26, 2013 sale of this of this program has been suspended.

We thank you all for your interest in the HEC-RAS Flipper program to correct HEC-RAS files exported from Civil3D. To assist you with creating a HEC-RAS model quickly and accurately from Civil 3D, Halff has prepared a video tutorial. Enjoy!

At Autodesk University (AU) 2011, the 'Floating Away: Connecting AutoCAD® Civil 3D® with HEC-RAS for Floodplain Mapping' class was presented detailing how to prepare detailed hydraulic models with Civil3D and HEC RAS. Click on the images below for the write-up, power-point and supporting information from this presentation.

Recent advances in Autodesk's flagship infrastructure design package, Civil 3D 2012, now allows for extraction of detailed geospatial hydraulic models for use with HEC-RAS. Combined with Civil3D's built in LiDAR point cloud processing, terrain modeling and automated grading, the HEC-RAS function allows for accurate analysis of flooding impacts from proposed improvements. Using Civil3D, evaluating the 'what-if' scenarios for floodplain reclamation, roadway construction, levee design and channel modification can be performed quicker.

Halff Associates has prepared a walkthrough tutorial PDF document for extracting detailed HEC-RAS floodplain models from surface models inside Civil 3D. This tutorial also provides guidance for using 'Export to DEM' method with the newly released and publicly available RAS Mapper in HEC-RAS version 4.1.0.

DCCADD has uploaded the Civil3D with HEC-RAS tutorial that Halff presented. It can be found on Jason Porter's DCCADD Dirt Modeler's blog. A direct link to the tutorial is also provided below.

2011.08.24

To get a FLT (ESRI float grid) from a surface in Civil3D, the tutorial uses SAGA GIS. This is an open source (free) GIS tool and requires a little bit of effort getting the conversion correct. Using the export to DEM method, Civil3D can export a surface as a GeoTiff. SAGA converts the GeoTIFF to a FLT which can be used for floodplain delineations with RAS Mapper. Download SAGA GIS here.

About the Programmer:

Mr. Carter, a project manager and professional engineer with Halff's Austin Water Resource Department, has been with the firm since 2007 and has more that 14 years of experience in the design of drainage, stream reclaimation, and restoration projects. For the past 14 years, Mr. Carter's experience has concentrated on evaluating and designing drainage facilities necessary to protect infrastructure from flooding and erosion.

Contact: acarter@halff.com