GSSHA Download

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GSSHA™ Executable Installation Downloads

Release Version

This is the most stable version. However this version is no longer being updated for bugs. If you are experiencing some difficulty you think is related to the code, download version 4.x and try that. Use of version 4 may require changes to your input files. These changes are being incorporated into the Wiki as they occur. Note: Use of GSSHA v 5.0 is generally reccomended.

Release Version

Version 4 development has ceased as of January 2009. As with Version 3, it is no longer being updated for bugs. Documentation of version 4 in the Wiki is essentially complete. Version 4 is compatible with WMS 8.2. Note: Users should begin using v 5 of GSSHA.

Developmental Version

This version includes significant enhancements including the ability to input hydrographs, with or without contaminants, at any point in the stream network and a version of the multi-layer G&A infiltration model that can be used in long term mode, linked with groundwater, and used in contaminant transport, including transport in the soils. This version also includes contaminant transport of constitutents attached to sediments. The sub-surface drainage with tile drains are working in this version as well. None of these features are currently supported by WMS. In addition, the input for the GAR infiltration model has been modified such that the wilting point value is entered in the G&A model of infiltration table and not included in the evapotranspiration table in the mapping table file. The automated calibration method has also been modified and undergone extensive testing to ensure robustness. As of Oct 2009 the automated calibration method can be used for calibration to sediment data, as well as flow data (See Chapter 18 of the manual). The most recent addition is the ability to put out maps of groundwater recharge (See Chapter 3 of the Manual). Other than the notes above GSSHA v 5.1 is generally supported by WMS v 8.2 which is currently being modified to include support for these new features. Note: in a previous version 5 (as of April 2009) the G&A infiltration method for single events was producing incorrect results, this problem has been resolved as of May 21, 2009. This problem did not affect models using GAR, multi-layer G&A, or RE solutions of infiltation. The October releases have bug fixes to the automated calibration routines.

It is generally reccomended that users of earlier versions of GSSHA and WMS switch to GSSHA v 5.0 and WMS v 8.2.

Watershed Modeling System

For Corps users, a copy of the WMS software can be obtained on the CHL web site. A license and password to use WMS can be obtained by following the instructions on the site.

For non-Corps users, a licensed copy of the WMS software can be obtained from the Aquaveo web site.

The WMS wiki can be found here.

WMS 8.1 interfaces with GSSHA™ 3.0b. The recently released WMS 8.2 interfaces with GSSHA™ 4.0 and GSSHA™ 5.0 .

Tutorial Files

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