HOME
wetlands defined
wetland delineation
hydrophytic plants
hydrophytic plant adaptations
wetland hydrology
-primary indicators
-secondary indicators
-test your knowledge
 
wetland soils
delineation procedures
wetland mitigation
 

 

Identification, delineation and mitigation

Wetland hydrology

Primary indicators

inundation | saturation within 12 inches of surface | water marks | drift lines
sediment deposits | drainage pattern

 
Saturation within 12 inches of surface
To observe this indicator dig a pit in the soil to a depth of 16 inches note the level at which water stands after a period of time. (Amount of time will depend on the soil texture).This level represents the depth to the water table. For this saturation to impact vegetation it should occur within 12 inches of the surface.

CAUTION: In some heavy clay soils, water may not rapidly accumulate in the hole even when the soil is saturated. If water is observed at the bottom of the hole but has not filled to the 12-inch depth, examine the sides of the hole and determine the shallowest depth at which water is entering the hole. When applying this indicator, both the season of the year and preceding weather conditions must be considered.

back to wetland hydrology page