Record Display for the EPA National Library Catalog

RECORD NUMBER: 19 OF 54

OLS Field Name OLS Field Data
Main Title Long-Term Distributions of Annual Sediment Yields from Small Watersheds.
Author Van Sickle, John ;
CORP Author Oregon State Univ., Corvallis. Dept. of Electrical and Computer Engineering.;Corvallis Environmental Research Lab., OR.
Year Published 1981
Report Number EPA-R-806255; EPA-600/J-81-499;
Stock Number PB82-154675
Additional Subjects Sediments ; Sediment transport ; Watersheds ; Mathematical models ; Yield ; Stochastic processes ; Forest land ; Harvesting ; Runoff ; Reprints ; Pacific Northwest Region(United States)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB82-154675 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 7p
Abstract
Annual sediment yields from small (< 20 sq km) mountain watersheds in the northwestern United States are approximately log normally distributed over time. Stochastic sediment yield models, based on brief, infrequent transport events, reproduce the log normal property. Observed cumulative distributions of annual yields from several Pacific Northwest drainages also appear to be log normal. The property gives a statistical basis for interpreting annual yield data. For example, impacts of watershed disturbance should be assessed by median rather than mean annual yield.