Record Display for the EPA National Library Catalog

RECORD NUMBER: 19 OF 44

OLS Field Name OLS Field Data
Main Title Downcore Variation in Sediment Organic Nitrogen (Journal Version).
Author Fisher, John Berton ; Matisoff, Gerald ; Lick, W. J. ;
CORP Author Case Western Reserve Univ., Cleveland, OH.;Environmental Research Lab., Duluth, MN.
Year Published 1982
Report Number EPA-R-8057160; EPA-600/J-82-361;
Stock Number PB83-243576
Additional Subjects Nutrients ; Sediments ; Metals ; Water pollution ; Nitrogen organic compounds ; Decomposition ; Microorganisms ; Concentration(Composition) ; Chemical reactions ; Mathematical models ; Lake Erie ; Reprints ; Organic loading ; Particulates ; Sediment water interfaces
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB83-243576 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 4p
Abstract
An historical record of natural (pre-cultural) and anthropogenic (influenced by man's activities) chemical inputs to the environment is contained in accumulating sediment deposits and is commonly expressed as a depositional flux. This flux is traditionally calculated as the product of the sediment accumulation rate and the concentration of a substance in the sediment. Previous work has quantified depositional fluxes of metals and nutrients by assuming that the vertical distribution of these substances in sediments is unaffected by post-depositional migration, chemical reaction or porosity variations. The authors present here a procedure for calculating the historical depositional flux (loading record) of a substance which undergoes post-depositional chemical reaction in a compacting sediment column. The method is demonstrated by calculating the loading record of organic nitrogen at one locality in Lake Erie. (Copyright (c) Macmillan Journals Ltd., 1982.)