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Main Title Evaluation of unsaturated/vadose zone models for Superfund sites /
Author Nofziger, D. L.
Other Authors
Author Title of a Work
Chen, Jin-Song.
Haan, C. T.
CORP Author Oklahoma Agricultural Experiment Station, Stillwater.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1994
Report Number EPA/600/R-93/184;CR-818709; EPA-R-818709
Stock Number PB94-157765
OCLC Number 30539721
Subjects Zone of aeration--United States--Mathematical models--Evaluation ; Soil moisture--United States--Mathematical models--Evaluation
Additional Subjects Hazardous materials ; Water flow ; Sediment transport ; Ground water ; Superfund ; Chemical compounds ; Mathematical models ; Soil properties ; Cleanup ; Unsaturation ; Concentration(Composition) ; Moisture content ; Density(Mass/volume) ; Weather ; Degradation ; Graphs(Charts) ; Tables(Data) ; Uncertainty
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-R-93-184 Headquarters Library/Washington,DC 02/17/2011
EJED  EPA 600/R-93-184 OCSPP Chemical Library/Washington,DC 08/27/1999
EMBD  EPA/600/R-93/184 NRMRL/GWERD Library/Ada,OK 07/08/1994
ESAD  EPA 600-R-93-184 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB94-157765 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation vii, 188 p. : ill. ; 28 cm.
Mathematical models of water and chemical movement in soils are being used as decision aids for defining ground-water protection practices for Superfund sites. Numerous transport models exist for predicting movement and degradation of hazardous chemical through soils. Many of these require extensive input parameters which include uncertainty due to soil variability and unknown future weather. The impact of uncertain model parameters upon the model output is not known. Model users need an understanding of this impact so they can measure the appropriate parameters for the site and incorporate the model prediction uncertainty into their decisions. The report summarizes research findings which address the sensitivity and uncertainty of model output due to uncertain input parameters. The objective of the research was to determine the sensitivity and uncertainty of travel time, concentration, mass loading and pulse width of contaminants at the water table due to uncertainty in soil properties such as organic carbon content, bulk density, water content, and hydraulic conductivity. Chemical properties, such as organic carbon partition coefficient and degradation half-life, were also examined. The four models selected for this analysis were RITZ, VIP, CMLS and HYDRUS.
"Funded wholly or in part by the ... under cooperative agreement # CR-818709 with the Oklahoma Agricultural Experiment Station, Oklahoma State University, Stillwater, Oklahoma"--T.p. verso. Shipping list no.: 94-0168-P. "March 1994." Includes bibliographical references (p. 184-186). "EPA/600/R-93/184."