Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
STOCHASTIC AND DETERMINISTIC ANALYSIS OF DISPERSION IN UNSTEADY-FLOW AT THE BORDEN TRACER-TEST SITE, ONTARIO, CANADA
Autore:
FARRELL DA; WOODBURY AD; SUDICKY EA; RIVETT MO;
Indirizzi:
UNIV MANITOBA,DEPT GEOL ENGN WINNIPEG R3T 2N2 MANITOBA CANADA UNIV WATERLOO,WATERLOO CTR GROUNDWATER RES WATERLOO N2L 3G1 ONTARIO CANADA
Titolo Testata:
Journal of contaminant hydrology
fascicolo: 3, volume: 15, anno: 1994,
pagine: 159 - 185
SICI:
0169-7722(1994)15:3<159:SADAOD>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
FICKIAN SUBSURFACE DISPERSION; NATURAL GRADIENT EXPERIMENT; QUASI-LINEAR THEORY; SOLUTE TRANSPORT; HETEROGENEOUS AQUIFERS; GROUNDWATER-FLOW; SPATIAL MOMENTS; SAND AQUIFER; MACRODISPERSION; MIGRATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
D.A. Farrell et al., "STOCHASTIC AND DETERMINISTIC ANALYSIS OF DISPERSION IN UNSTEADY-FLOW AT THE BORDEN TRACER-TEST SITE, ONTARIO, CANADA", Journal of contaminant hydrology, 15(3), 1994, pp. 159-185

Abstract

In this work, recently collected water-level data from the Borden aquifer are applied to two recent models to determine whether they predict the observed horizontal transverse dispersion observed at the aquifer. The collected water-level data are first detrended using a combination of ordinary least-squares and generalized least-squares methods. The trend surface information shows that the hydraulic head gradient istransient. A geostatistical analysis is performed on the time series of the components of the hydraulic head gradient to determine the variances and integral scales present. Assuming the data represent earlierbehaviour at the aquifer, the results of the geostatistical analysis are combined with those obtained from the Stanford Waterloo tracer experiment and the combination used to evaluate Rehfeldt's equations for the asymptotic macrodispersivity due to unsteady flow conditions. The computed range in asymptotic transverse horizontal macrodispersivity is found to be 0.0014 m less-than-or-equal-to A22 less-than-or-equal-to0.054 m. This computed range is in good agreement with the measured dispersivity values for the Borden aquifer. Spectral analysis is also performed on the component of hydraulic head gradient perpendicular to the mean flow direction and these results, along with those obtained from the Stanford Waterloo tracer experiment, are incorporated into Naff et al.'s moment model to predict the horizontal transverse moments at the site. The moments, computed using Naff et al.'s model, are foundto significantly under-predict the observed moments at the site. The analysis shows that flow transients contribute to the transverse macrodispersion at the Borden site.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 02:12:56