Large-scale natural gradient tracer test in sand and gravel, Cape Cod, Massachusetts: 2. Analysis of spatial moments for a nonreactive tracer
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Abstract
A large-scale natural gradient tracer test was conducted to examine the transport of reactive and nonreactive tracers in a sand and gravel aquifer on Cape Cod, Massachusetts. As part of this test the transport of bromide, a nonreactive tracer, was monitored for about 280 m and quantified using spatial moments. The calculated mass of bromide for each sampling date varied between 85% and 105% of the injected mass using an estimated porosity of 0.39, and the center of mass moved at a nearly constant horizontal velocity of 0.42 m per day. A nonlinear change in the bromide longitudinal variance was observed during the first 26 m of travel distance, but afterward the variance followed a linear trend, indicating the longitudinal dispersivity had reached a constant value of 0.96 m. The transverse dispersivities were much smaller; transverse horizontal dispersivity was 1.8 cm, and transverse vertical dispersivity was about 1.5 mm.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Large-scale natural gradient tracer test in sand and gravel, Cape Cod, Massachusetts: 2. Analysis of spatial moments for a nonreactive tracer |
| Series title | Water Resources Research |
| DOI | 10.1029/91WR00242 |
| Volume | 27 |
| Issue | 5 |
| Year Published | 1991 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 14 p. |
| First page | 911 |
| Last page | 924 |
| Country | United States |
| State | Massachusetts |
| Other Geospatial | Cape Cod |
| Google Analytic Metrics | Metrics page |