Record Display for the EPA National Library Catalog


Main Title Statistical Basis for the Design and Interpretation of the National Surface Water Survey. Phase 1. Lakes and Streams.
Author Blick, D. J. ; Messer, J. J. ; Landers, D. H. ; Overton, W. S. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Oregon State Univ., Corvallis. Dept. of Statistics.
Year Published 1987
Report Number EPA/600/D-88/160;
Stock Number PB88-237938
Additional Subjects Water pollution ; Surface waters ; Environmental surveys ; Acid deposition ; Lakes ; Streams ; Statistical samples ; Reprints ; National Surface Water Survey
Library Call Number Additional Info Location Last
NTIS  PB88-237938 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
The primary objectives of Phase I of the National Surface Water Survey were to determine the number of acidic or potentially acidic lakes and streams, their location, and their physical and chemical characteristics. To meet these objectives, a statistically designed survey was implemented. For both lakes and streams, probability samples were drawn in order to make population estimates within known confidence bounds. The National Lake Survey utilized a stratified design in which the population consisted of lakes identified on 1:250,000 maps in regions of interest. Strata were defined on the basis of region, subregion, and mapped alkalinity classes. A systematic random sample was taken within each stratum. The National Stream Survey was also stratified by region and subregion, but a two-stage sampling scheme utilizing a point frame was employed within strata.