Shallow Seasonal High Water Table

In areas with a shallow depth to the seasonal high water table elevation, select green infrastructure with shallow profiles or design green infrastructure to be submerged within the groundwater table. For example, set pervious pavement adjacent to a constructed wetland. Instead of recharging, the pervious pavement would flow horizontally into the adjacent wetland area to assist in maintaining the wetland hydrology.

Green infrastructure BMPs that have a shallow profile include the following:

• Pervious pavement such as asphalt, concrete, and pavers
• Vegetated filter strip

Green infrastructure BMPs that can be set into the water table include:

• Manufactured Treatment Devices
• Wet pond
• Constructed wetland
• Subsurface gravel wetland