All wetlands must meet three criteria:
1. soils developed in wet conditions
2. wet either above ground or
within 12 inches of the surface
during all or part of the growing season
adapted to live in wet
U.S. Fish and Wildlife Service divided wetlands into 8 types (Types 1-8). The two primary characteristics used in the
classification system include the wetland's dominant plant type and water depth during the growing season.
Wetlands monitored in WHEP are depressional wetlands with emergent marsh vegetation (Types 3, 4, or 5).
The Minnesota Pollution Control Agency designed and tested
the WHEP sampling protocols for Type 3, 4 and 5 wetlands located in the Central Hardwood Region of the State of Minnesota.
Wetlands sampled in WHEP are chosen by the sponsoring agency
(City, Watershed Managment Organization, Park Department, etc.).