RAPID to GSSHA

It is possible to use RAPID streamflow as an overland flow boundary condition to the Gridded Surface Subsurface Hydrologic Analysis (GSSHA) model.

What is GSSHA?

GSSHA is a physically-based, distributed hydrologic model. GSSHA is developed and maintained by Coastal and Hydraulics Laboratory (CHL) which is a member of the Engineer Research & Development Center of the United States Army Corps of Engineers (USACE).

Note

For more information about GSSHA please visit the the gsshawiki .

Tutorial

There are two ways to input RAPID as a boundary condition for GSSHA. One is to connect the GSSHA stream network link and node to the RAPID river ID and generate the IHG file. The other is to generate an XYS timeseries file and add it to the netork using WMS.

Method 1: Generate IHG File

Step 1.1: Look at Stream Network in WMS to find Link & Node

1. Open GSSHA project in WMS

   • Switch to 2-D Grid Module
   • In the top menu: GSSHA -> Open Project File

2. Turn on Stream Link Numbers Display

   • In the top menu: Display -> Display Options
   • Select Map Data in top left box
   • In the center box, make sure Stream Link Numbers is checked under the Arcs subsection.

3. Determine the Link ID by looking on model.

Step 1.2: Connect RAPID river ID to GSSHA Link & Node and Generate IHG

Method 2: Generate XYS File

Step 2.1: Generate XYS File

Step 2.2: Add XYS File in WMS

In the Distributed Hydrology section, go to Overland Flow Boundary Conditions in GSSHA (Tutorial 55) at http://www.aquaveo.com/software/wms-learning-tutorials

Here is a direct link to the document: http://wmstutorials-10.1.aquaveo.com/55%20Gssha-Applications-OverlandBoundaryConditions.pdf