Record Display for the EPA National Library Catalog

RECORD NUMBER: 5 OF 8

OLS Field Name OLS Field Data
Main Title Numerical Models for Predicting Watershed Acidification.
Author Eary, L. E. ; Jenne, E. A. ; Vail, L. W. ; Girvin., D. C. ;
CORP Author Corvallis Environmental Research Lab., OR. ;Battelle Pacific Northwest Labs., Richland, WA. Environmental Sciences Dept.
Publisher c1989
Year Published 1989
Report Number EPA/600/J-89/473;
Stock Number PB91-115956
Additional Subjects Acidification ; Mathematical models ; Deposition ; Water pollution ; Responses ; Hydrology ; Water flow ; Routing ; Soil chemistry ; Simulation ; Test methods ; Geochemistry ; Reliability ; Neutralizing ; Environmental impacts ; Weathering ; Cation exchanging ; Sulfates ; Watersheds ; Ecosystems
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB91-115956 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 03/04/1991
Collation 27p
Abstract
Three numerical models of watershed acidification, including the MAGIC II, ETD, and ILWAS models, are reviewed, and a comparative study is made of the specific process formulations that are incorporated in the models to represent hydrological, geochemical, and biogeochemical processes which affect the responses of watersheds to acidic deposition. The models differ notably in the level of detail with which they represent various processes and in the degree of aggregation used to assimilate important watershed-specific parameters relating to hydrologic-flow routing and soil and solution chemistry. The models have been used to simulate the short-term dynamics of water quality at a number of different watersheds currently receiving acidic deposition. The predictive reliabilities of these models still need to be tested against observed data from watersheds that have been monitored for long periods.