Altered Hydric Soils. by: Wade Hurt, USDA, NRCS, NSSC/ University of Florida, Gainesville, FL, Chris Noble, USACE, Vicksburg, MS, and Victor Carlisle, University of Florida, Gainesville, FL. Types of Altered Hydric Soils. Artificial Drained (Protected) Historic Relict
Wade Hurt, USDA, NRCS, NSSC/ University of Florida, Gainesville, FL, Chris Noble, USACE, Vicksburg, MS, and Victor Carlisle, University of Florida, Gainesville, FL.
This dug pond has an artificial hydric soil fringe that was created when the pond was constructed. It now supports a wetland ecosystem.
The wetland shown here and on the first slide was created by removing soil material from a nonhydric soil. The resulting soil is an Artificial Hydric Soil.
Construction activities, note the railroad in the background, may be the reason wetlands and hydric soils exist here.
Historic Hydric Soils are altered soils that were once hydric but have had human modifications (additions) such that they are no longer hydric. The additions may be intentional (illegal fill) or non intentional (erosional deposition).
Channelization and the resulting spoil may change the hydric status of a soil. Also the surrounding area may have reduced wetness.
Depleted Matrix starts here
These redoximorphic features (nodules) most likely are relict because they have sharp boundaries and smooth surfaces. (photograph Vepraskas. 1994)
Relict redox concentrations may have sharp boundaries.
Present Land SurfaceGeologic Land Surface
Geologic Hydric Soil Boundary
Present Hydric Soil Boundary
0-10 cm lfs 10YR 5/3 10-29 cm sc 10YR 5/2 cd 10R 3/3
0-19 cm fsl 10YR 4/2 19-27 cm scl 10YR 4/2 fd 7.5YR 4/6
0-12 cm fsl 10YR 4/2 12-29 cm scl 10YR 4/2 cd 7.5YR 4/6
0-10 cm l 10YR 5/3 cd 7.5YR 4/6 10-25 cm sl 10YR 5/2 cd 7.5YR 4/6
cd = common distinct fd = few distinct