Record Display for the EPA National Library Catalog


Main Title Predicting and forecasting surface water acidification: a planfor assessing data aggregation effects /
Author Johnson, M. G. ; Shaffer, P. W. ; Stevens, D. L. ; Thornton, K. W. ; Turner, R. S.
CORP Author ManTech Environmental Technology, Inc., Corvallis, OR. ;FTN Associates, Little Rock, AR. ;Oak Ridge National Lab., TN.;Corvallis Environmental Research Lab., OR.
Year Published 1991
Report Number EPA/600/3-91/024
Stock Number PB91-182451
Additional Subjects Water pollution effects ; Surface waters ; Acidification ; Soil surveys ; Agglomeration ; Simulation ; Soil science ; Forecasting ; Deposition ; Watersheds ; Mathematical models ; Hydrology ; US EPA ; Adsorption ; Sulfates ; Cations ; Water chemistry ; Regional analysis ; Physical properties ; Chemical properties ; Direct/Delayed Response Project ; Northeast Region(United States) ; Southeast Region(United States) ; Appalachian Mountain Region(United States)
Library Call Number Additional Info Location Last
NTIS  PB91-182451 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 66 pages ; 29 cm
A major goal of the Direct/Delayed Response Project (DDRP), a project within the U.S. Environmental Protection Agency's (EPA) Aquatic Effects Research Program (AERP) is to project potential changes in surface water chemistry in lakes in the northeastern U.S. and streams in the Mid-Appalachians and southeastern U.S., over the next 50 years as a function of current and alternative levels of acidic deposition. The DDRP projection are based on various types of simulations models that predict surface water and soil chemistry. All models- statistical, empirical, mechanistic, logical or others - represent a simplification or abstraction of the real world. A major question associated with the application of an model is how to prepare subset, and aggregate, or lump, data so that they will represent the processes and system being simulated. The models used in the DDRP require physical and chemical data on watershed soils as part of the model inputs. In conjunction with the DDRP, soil surveys were conducted in selected watersheds in each of the three regions. The document describes and discusses the approaches used in the DDRP for aggregating soil chemical and physical data for use in the various DDRP analyses.
"EPA 600/3-91/024." April 1991. Microfiche.
Contents Notes