Wetlands:Wetlands setup

Wetlands are set up in WMS through creating a wetlands polygon. This polygon is in the same coverage as the stream data for the GSSHA simulation. When creating the polygon, be careful not to click on or very close to any stream arcs. Once the polygon is created, set its attributes to be a wetlands polygon. The following parameters must be defined and are uniform across the polygon extent.

• Initial Depth (mm) - Initial depth of water in the cell, from the bottom of the retention depth.
• Retention Depth (mm) - Depth of the peat layer. This value is actually subtracted from the elevation grid inside of GSSHA.
• Retention Depth Hydraulic Conductivity (m/day) - Lateral seepage hydraulic conductivity through the peat layer.
• Vegetation Height (mm) - Height of the vegetation above the peat layer.
• Vegetation Height Hydraulic Conductivity (m/day) - Lateral seepage hydraulic conductivity through the bottom of the vegetation.
• Inundated Vegetation Manning's Roughness - Manning's roughness value after the vegetation is overtopped (and possibly flattened.)

To visualize the wetland cells that underlie the polygon, turn on the wetland cells option in the 2D Grid Display Options dialog.

Related Topics

GSSHA Wiki Main Page
Primer Main Page

Wetlands

Wetlands conceptual model

Wetlands setup