Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Regional Reference Sites: A Method for Assessing Stream Potentials.
Author Hughes, R. M. ; Larsen, D. P. ; Omernik, J. M. ;
CORP Author Northrop Services, Inc., Corvallis, OR.;Corvallis Environmental Research Lab., OR.
Year Published 1986
Report Number EPA-68-03-3124; EPA/600/J-86/218;
Stock Number PB87-170767
Additional Subjects Ecology ; Assessments ; Stream pollution ; Sites ; Classifying ; Disturbances ; Environmental impacts ; Watersheds ; Maps ; Variability ; Sampling ; Reprints ; Reference sites
Library Call Number Additional Info Location Last
NTIS  PB87-170767 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
Collation 9p
Field assessments of impacted streams require a control or at least an unbiased estimate of attainable conditions. Control sites, such as upstream/downstream or wilderness sites, have proven inadequate for assessing attainable ecological conditions where the control streams differ naturally from the impacted streams to a considerable degree or where different disturbances exist than those being studied. Relatively undisturbed reference sites with watersheds in areas having the same land-surface form, soil, potential natural vegetation, and land use as are predominant in large, relatively homogeneous regions are suggested as alternative control sites. These areas are considered typical of the region because their watersheds exhibit all the terrestrial variables that make that region a region. (Copyright (c) 1986 Springer-Verlag New York Inc.)