CWD Wetland Identification & Classification 3

Question 1

In the Cowardin classification, which water regime modifier is used for areas that are flooded throughout the year in all years?

Accepted Answer

Permanently flooded

Answer

Permanently flooded means water covers the land surface throughout the year in all years.

Question 2

Which HGM subclass describes a wetland located on a slope where groundwater discharges to the surface and flows downslope as sheet flow?

Accepted Answer

Slope

Answer

Slope wetlands occur on topographic inclines and are fed by groundwater discharge, with lateral water movement as their primary hydrologic characteristic.

Question 3

A delineator finds black, mucky soil with a strong sulfurous odor in the upper 12 inches. This is most indicative of:

Accepted Answer

A hydric soil with reduced conditions and hydrogen sulfide production

Answer

Hydrogen sulfide odor (rotten egg smell) indicates strongly anaerobic reducing conditions characteristic of hydric soils.

Question 4

Which indicator is used to confirm wetland hydrology in areas where surface water is not present at the time of observation?

Accepted Answer

Secondary indicators such as water-stained leaves or drift deposits

Answer

Secondary hydrologic indicators like drift lines, water-stained leaves, sediment deposits, and aquatic invertebrates confirm past inundation when water is not present.

Question 5

According to the 1987 Corps Manual, what percentage of dominant plant species must be hydrophytic (OBL, FACW, FAC) to meet the vegetation criterion?

Accepted Answer

More than 50%

Answer

More than 50% of dominant species across all strata must have a wetland indicator status of OBL, FACW, or FAC to meet the hydrophytic vegetation criterion.

(CWD) Certified Wetland Delineator Practice Test

(CWD) Certified Wetland Delineator Practice Test

CWD Wetland Identification & Classification 3