Combined use of frequency-domain electromagnetic and electrical resistivity surveys to delineate near-lake groundwater flow in the semi-arid Nebraska Sand Hills, USA
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Abstract
A frequency-domain electromagnetic (FDEM) survey can be used to select locations for the more quantitative and labor-intensive electrical resistivity surveys. The FDEM survey rapidly characterized the groundwater-flow directions and configured the saline plumes caused by evaporation from several groundwater-dominated lakes in the Nebraska Sand Hills, USA. The FDEM instrument was mounted on a fiberglass cart and towed by an all-terrain vehicle, covering about 25 km/day. Around the saline lakes, areas with high electrical conductivity are consistent with the regional and local groundwater flow directions. The efficacy of this geophysical approach is attributed to: the high contrast in electrical conductivity between various groundwater zones; the shallow location of the saline zones; minimal cultural interference; and relative homogeneity of the aquifer materials.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Combined use of frequency-domain electromagnetic and electrical resistivity surveys to delineate near-lake groundwater flow in the semi-arid Nebraska Sand Hills, USA |
| Series title | Hydrogeology Journal |
| DOI | 10.1007/s10040-010-0617-x |
| Volume | 18 |
| Issue | 6 |
| Year Published | 2010 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | OGW Branch of Geophysics, Office of Ground Water, Toxic Substances Hydrology Program |
| Description | 7 p. |
| First page | 1539 |
| Last page | 1545 |
| Country | United States |
| State | Nebraska |
| Other Geospatial | Nebraska Sand Hills |
| Google Analytic Metrics | Metrics page |