Combined use of frequency-domain electromagnetic and electrical resistivity surveys to delineate near-lake groundwater flow in the semi-arid Nebraska Sand Hills, USA

Autor:	Eric A. White, John B. Ong, John W. Lane, Vitaly A. Zlotnik, Todd Halihan
Rok vydání:	2010
Předmět:	Hydrology High contrast geography Hydrogeology geography.geographical_feature_category Groundwater flow Combined use Aquifer Arid Electrical resistivity and conductivity Earth and Planetary Sciences (miscellaneous) Geomorphology Groundwater Geology Water Science and Technology
Zdroj:	Hydrogeology Journal. 18:1539-1545
ISSN:	1435-0157 1431-2174
DOI:	10.1007/s10040-010-0617-x
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b1dc918b553204bec3b5053c890d11c2 https://doi.org/10.1007/s10040-010-0617-x Zobrazit plný text záznamu Full text from SpringerLink