N2: Oral Presentation C Thursday, 4:00 Ė 4:30 pm C Lake Superior Ballroom MN
SWCD: A Wetland Functional Analysis Model
Clay Soil and Water Conservation District
1506 30th Avenue South Suite B
Moorhead, MN 56560
Pro-West & Associates, Inc.
PO Box 812
Walker, MN 56484
Clay County, funded by a challenge grant through
the Minnesota Board of Water and Soil Resources (BWSR) and Legislative
Commission on Minnesota Resources (LCMR), has developed a wetland model to
assist in local wetland planning. The model uses GIS to evaluate wetland
functions and generate a map with detailed information -≠ both physical and
functional. Using the hydric soils coverage along with DEMís, and in some
areas photo interpretation data, the whole county has been analyzed for possible
drained wetland basins that can be evaluated as potential replacement sites. GIS
tools have been developed that will assist the user in locating replacement
sites with similar functions or total score as the impacted wetland, either in
the same minor watershed or a nearby watershed.
An interagency technical panel was assembled to develop criteria for evaluating wetland functions based on their area of expertise. Wetland Functions were determined by physical or geophysical characteristics and rated as low, medium or high. The results of this analysis identify wetlands that are high priority for protection and those where greater jurisdictional flexibility may be exercised. It improves the efficiency of natural resource managers and saves considerable time in processing wetland applications. It also provides a basis for local policy decisions.