Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Storm Sewer Design - An Evaluation of the RRL Method.
Author Stal, John B. ; Terstrie, Michael L. ;
CORP Author Illinois State Water Survey, Urbana.
Year Published 1972
Report Number EPA-11030-FLN; 03519,; R2-72-068
Stock Number PB-214 134
Additional Subjects ( Storms ; Surface water runoff) ; ( Storm sewers ; Structural design) ; Rainfall ; Surface drainage ; Urban areas ; Pipes(Tubes) ; Fluid flow ; Evaluation ; RRL method
Library Call Number Additional Info Location Last
NTIS  PB-214 134 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 82p
Storm rainfall and runoff data were assembled from 10 urban basins in the U.S.A. ranging in size from 14 acres to 8 sq mi. The British RRL method of storm drainage design was applied to the 10 basins. The RRL method considers the urban basin to be comprised of the paved area of the basin which is directly connected to the artificial storm drainage system. In 3 of the 10 basins the RRL procedure was deemed to be appropriate and suitable for the design of a storm drainage system within the normal range of frequency of design rainfall events, from 2 to 20-year events. For greater storms and for certain cases within this frequency range, the RRL method breaks down because the runoff coming from the grassed area of the basin is significant. If the basin is highly steep or if the paved area comprises less than 15% of the total basin, this breakdown occurs. An example is given of the use of the RRL method in the re-design of an existing storm drainage system, as is current practice in Great Britain. (Author)