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RECORD NUMBER: 40 OF 48

OLS Field Name OLS Field Data
Main Title Statistical Evaluation of the EMAP-Wetlands Classification.
Author Ernst, T. L. ; Leibowitz, N. C. ;
CORP Author ManTech Environmental Technology, Inc., Corvallis, OR. ;Oregon Div. of State Lands, Salem.;Corvallis Environmental Research Lab., OR.
Publisher 1993
Year Published 1993
Report Number EPA-68-C8-0006 ;EPA-68-03-3532; EPA/600/A-93/121;
Stock Number PB93-199446
Additional Subjects Wetlands ; Environment management ; Environmental impact assessments ; Ecosystems ; Illinois ; Washington ; North Dakota ; South Dakota ; Pollution monitoring ; Natural resource management ; EMAP(Environmental Monitoring and Assessment Program) ; NWI(National Wetlands Inventory)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-199446 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/23/1993
Collation 34p
Abstract
The study evaluates how well the EMAP-Wetlands sampling design estimates the wetland resource represented by the U.S. Fish and Wildlife Services's NWI digital wetlands data for portions of Illinois, Washington, and North and South Dakota. The EMAP-Wetlands sampling design was evaluated by comparing numbers of wetland polygons, total areas, and common versus rare classes in the EMAP sample to the NWI data base. Summary statistics demonstrate that the EMAP sample estimates compare well to the known population parameters, except for rare wetland classes. Rare EMAP classes, defined as comprising < 1 percent of the total number or total area of wetlands in a region, were estimated with poor accuracy and precision. Rare EMAP classes, in these regions, included saturated palustrine emergents, saturated emergents along rivers, and saturated forested/scrub-shrub wetlands along rivers.