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Flashcards in Corps Delineation Deck (7):

"normal circumstances"

The soil and hydrological conditions that would exist if the vegetation or hydrology were not altered or removed


special aquatic sites

- significantly influencing or positively contributing to the general overall health or vitality of the ecosystem or region
- wetlands, mudflats, vegetated shallows, coral reefs, riffle and pool complexes, official sanctuary or refuge


arid west hydrology indicators

-Group A: Direct observation of surface or groundwater
-Group B: Evidence of flooding or ponding, but no surface water
-Group C: Indirect evidence of soil saturation
-Group D: Vegetation/soil features indicating contemporary wet conditions


waters of the U.S.

- Waters used in interstate or foreign commerce
- Waters subject to the ebb and flow of the tide
- Interstate waters, wetlands
- lakes rivers streams mudflats sandflats sloughs
- adjacent wetlands and tribs



"Those areas that are inundated or saturated by surface or groundwater at a frequency or duration sufficient to support, and that under normal circumstances, do support a prevalence of vegetation typically adapted for line in saturated soil conditions.


field techniques to verify reduction

- redox potential (meter)
- Dyes
- Rusty nails
- FeO2 paper


How to determine if the rain is wetting the soil and not the water table

dig further and find water table