| Main Title |
Natural Gradient Experiment on Solute Transport in a Sand Aquifer. 2. Spatial Moments and the Advection and Dispersion of Nonreactive Tracers. |
| Author |
Freyberg, D. L. ;
|
| CORP Author |
Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK. |
| Year Published |
1986 |
| Report Number |
EPA-R-808851; EPA/600/J-86/329; |
| Stock Number |
PB87-176673 |
| Additional Subjects |
Aquifers ;
Sand filters ;
Hydraulic conductivity ;
Bromides ;
Chlorides ;
Plumes ;
Ground water ;
Solutes ;
Transport properties ;
Gradients ;
Dispersing ;
Reprints ;
Tracer studies
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB87-176673 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
19p |
| Abstract |
The three-dimensional movement of a tracer plume containing bromide and chloride is investigated using the data base from a large-scale natural gradient field experiment on groundwater solute transport. The analysis focuses on the zeroth-, first-, and second-order spatial moments of the concentration distribution. These moments define integrated measures of the dissolved mass, mean solute velocity, and dispersion of the plume. Estimates of the mass in solution for both bromide and chloride demonstrate that the tracers behaved conservatively, as expected. Analysis of the first-order moment estimates indicates that the experimental tracer plumes traveled along identical trajectories. The estimated mean solute velocity is identical for both tracers (0.091 m/day) and is spatially and temporally uniform for the first 647 days of travel time. Plots of the components of the covariance tensor as functions of time show evidence of what is commonly called 'scale-dependent' dispersion: the rate of growth of the covariance over time is not linear. (Copyright (c) 1986 by the American Geophysical Union.) |
| Supplementary Notes |
Pub. in Water Resources Research, v22 n13 p2031-2046 Dec 86. See also PB87-176665. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Natural Gradient Experiment on Solute Transport in a Sand Aquifer. 2. Spatial Moments and the Advection and Dispersion of Nonreactive Tracers. |
| PUB Date Free Form |
c1986 |
| Category Codes |
68D |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/15 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
716921212 |
| Origin |
NTIS |
| Type |
CAT |
