Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Studies in the Analysis of Metropolitan Water Resource Systems. Volume V: A Method of Data Reduction for Water Resources Information Storage and Retrieval.
Author Lewinge, K. L. ;
CORP Author Cornell Univ., Ithaca, N.Y. Water Resources and Marine Sciences Center.
Year Published 1972
Report Number TR-51; DI-14-31-0001-3684; OWRR-C-3101 (3684); 06505,; C-3101 (3684) (1)
Stock Number PB-217 862
Additional Subjects ( Water resources ; Information systems) ; ( Urban areas ; Water resources) ; Data reduction ; Information retrieval ; Data acquisition ; Water quality ; Economic models ; Computer programs ; Benefit cost analysis ; Management ; Allocation models ; Linear programming ; Management information systems
Library Call Number Additional Info Location Last
NTIS  PB-217 862 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 75p
Data storage and retrieval expenses represent a significant portion of the cost of operating a management information system. The study focuses on the question of how much data already collected need be stored for future use, and on methods of reducing the quantity of data without necessarily reducing the information content. Several linear interpolation and least squares methods are explored for achieving data reduction, using as a means of illustration twenty-three different types of hydrologic records. Discussed also is the value of the data, the desired accuracy needed for various water resources studies, and the costs of data reduction as compared to data storage and retrieval.