| Main Title |
Large-Scale Natural Gradient Tracer Test in Sand and Gravel, Cape Cod, Massachusetts. 1. Experimental Design and Observed Tracer Movement. |
| Author |
LeBlanc, D. R. ;
Garabedian, S. P. ;
Hess, K. M. ;
Felhar, L. W. ;
Quadri, R. D. ;
|
| CORP Author |
Geological Survey, Reston, VA. ;Massachusetts Inst. of Tech., Cambridge. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.;National Science Foundation, Washington, DC. |
| Publisher |
c1991 |
| Year Published |
1991 |
| Report Number |
NSF-ECE83-11786 ;NSF-CES88-14615; EPA/600/J-91/135; |
| Stock Number |
PB91-216275 |
| Additional Subjects |
Tracer studies ;
Environmental transport ;
Subsurface investigations ;
Water pollution ;
Path of pollutants ;
Aquifers ;
Ground water ;
Chemical properties ;
Field tests ;
Physical properties ;
Lithium ;
Bromides ;
Horizontal orientation ;
Vertical migration ;
Injection wells ;
Stochastic processes ;
Geochemistry ;
Hydrogeology ;
Hydrology ;
Water quality ;
Molybdates ;
Reprints ;
Cape Cod(Massachusetts)
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB91-216275 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
18p |
| Abstract |
A large-scale natural gradient tracer experiment was conducted on Cape Cod, Massachusetts, to examine the transport and dispersion of solutes in a sand and gravel aquifer. The nonreactive tracer; bromide, and the reactive tracers, lithium and molybdate, were injected as a pulse in July 1985 and monitored in three dimensions as they moved as far as 280 m down-gradient through an array of multilevel samplers. The bromide cloud moved horizontally at a rate of 0.42 m per day. It also moved downward about 4 m because of density-induced sinking early in the test and accretion of areal recharge from precipitation. After 200 m of transport, the bromide cloud had spread more than 80 m in the direction of flow, but was only 14 m wide and 4-6 m thick. The lithium and molybdate clouds followed the same path as the bromide cloud, but their rates of movement were retarded about 50% relative to bromide movement because of sorption onto the sediments. (Copyright (c) 1991 by the American Geophysical Union.) |
