Gridded Surface Subsurface Hydrologic Analysis

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Welcome to the GSSHA™ Wiki!

The GSSHA™ Wiki is the best source for up to date information on the GSSHA™ model. In the last two to three years many new features have been added to the GSSHA™ model. Many of these features were developed or released after the publication of the primer and manual. One of the main purposes of the GSSHA™ Wiki is to keep the documentation up to date with the model development. Currently we are updating all the documentation and tutorials for the model on this site, such that the information on the site changes daily. Once the overhaul of the documents is complete, modifications will be made to the Wiki to keep up with further advances and releases. If you are an experienced GSSHA™ user you may still find some model features missing from the site. This site will cover only release versions of the code. Currently we are on release version 4.0. Release version 3.0b is supported by WMS 8.1, which can be downloaded below (under the Tutorials section on this page).

As many users may be aware, support of features in WMS typically lags behind development of GSSHA™. This is nescessary in that we must settle on final GSSHA™ inputs and outputs before we ask them to be added to WMS. While we strongly encourage GSSHA™ users to use WMS for pre and post processing, users should be aware that many GSSHA™ models, especially GSSHA™ models with advanced features, must be at least partially developed outside of WMS. In addition to WMS, we have developed several utilities to assist in the development of GSSHA™ inputs. These utilities already are or will be added to the site as we get to them. The documents provided here describe the actual inputs to the GSSHA™ model and should be consulted when there are questions about inputs, whether developed from WMS or by other means.

This site is always being developed, so check back often for additional improvements, updates, and resources.

Chuck

1 Welcome to the GSSHA™ Wiki!
2 GSSHA™ Software Primer
3 GSSHA™ User's Manual
4 GSSHA™ Tutorials
5 Utility Programs
6 Obtaining Data
7 GSSHA™ Bibliography
8 Test Cases
9 Wiki Editing Guidelines
10 GSSHA™ Download
11 Disclaimer

GSSHA™ Software Primer

This document is a primer for use of the Watershed Modeling System (WMS) interface with the physically based, distributed-parameter hydrologic model Gridded Surface Subsurface Hydrologic Analysis (GSSHA™). The primary purpose of this primer is to describe how the WMS interface is used to develop inputs and analyze output from the GSSHA™ model. This primer also provides a brief description of the GSSHA™ model, including the overall model formulation, processes that can be simulated, and input formats for files not supported by WMS.