OLS : Record


Main Title Aquatox for Windows a modular fate and effects model for aquatic ecosystems. {microform} :
Author Park, R. A.
CORP Author Environmental Protection Agency, Washington, DC. Office of Water.
Publisher U.S. Environmental Protection Agency, Office of Water, Office of Science and Technology,
Place Published Washington, DC :
Year Published 2000
Report Number EPA/823/R-01/008
Stock Number PB2002-104397
OCLC Number 51066228
Subjects Ecosystem models; Aquatic ecosystems; Toxic chemicals; Model components; Applications; Data considerations; Calibration; Biomass; Documentation; Quality assurance; Validation; Uncertainty analysis; Environmental factors; Ecological risk models; AQUATOX; Microsoft windows
Subject Added Ent Aquatic ecology--Computer programs--Handbooks, manuals, etc
Internet Access
Description Access URL
Library   Call Number Additional Info Location Date Modified
ERBD PB2002-104397 NERL/ESD-LV Library/Las Vegas,NV 04/18/2003
NTIS PB2002-104397 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Edition Release 1.1 .
Collation 41 p.
Abstract The AQUATOX periphyton submodel was successfully calibrated and validated with data from Walker Branch, Tennessee. A single parameter set for diatoms, green algae, and gastropods was developed to fit all twenty treatments in a factorial experiment involving low and high nutrient levels, low and high light levels, and grazing and no grazing in stream-side channels and stream enclosures. A two-year data set for periphyton on cobbles in the stream-bed was used to validate the model for continuous ambient conditions in this woodland stream. Nitrogen, phosphorous, light, and grazing were all limiting, both singly and in combination. Inclusion of a sloughing term based on senescence due to deteriorating environmental conditions and the drag force of currents on exposed periphyton biomass provided a realistic response to limiting environmental factors and was especially useful in modeling the effects of variable flow rates on diatoms and filamentous algae. The model was shown to be calibrated and validated based on the weight of evidence of reproduction of observed patterns of biomass change, concordance of maxima between predicted and observed biomass, and equivalence in predicted and observed means and variances as confirmed by relative bias and F tests.
Notes "November 2001." EPA/823/R-01/008 vol. 3 only Includes bibliographical references. Microfiche.
Contents Notes v. 3. Model validation reports Addendum.
Availability Notes Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
Corporate Au Added Ent United States. Environmental Protection Agency. Office of Water. ; United States. Environmental Protection Agency. Office of Science and Technology.
Alternate Title Modular fate and effects model for aquatic ecosystems
PUB Date Free Form {2001- }
NTIS Prices PC A04/MF A01
BIB Level m
OCLC Time Stamp 20030416134131
Cataloging Source OCLC/T
Language eng
Origin OCLC
OCLC Rec Leader 01271cam 2200313Ka 45020