Preliminary hydrologic observations of a regional aquifer system in glacial deposits and carbonate bedrock, Midwestern Basin and Arches Region

Conference · Wed Jan 01 00:00:00 EST 1992 · Geological Society of America, Abstracts with Programs; (United States)

OSTI ID:5805064

Eberts, S M ^[1]

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1. Geological Survey, Columbus, OH (United States). Water Resources Div.

A conceptual model of ground-water flow in the steady-state regional aquifer system has been developed. Boundaries of the regional aquifer system include physical boundaries, such as surface-water bodies and freshwater-saltwater interfaces, and hydraulic boundaries, such as ground-water divides and streamlines. The water-table configuration is a subdued reflection of land-surface topography as established by means of linear regression of land-surface and water-table altitudes. A potentiometric-surface map of the underlying semiconfined carbonate aquifer, generated from a set of synoptic water-level measurements, also illustrates the effect of land-surface topography on the regional aquifer system. Hydraulic gradients in the carbonate aquifer are flattest in the northern part of the study areas, except along the Wabash River and east of the Sandusky River, and steepen in the central and southern parts of the study area. Potentiometric highs on the regional potentiometric-surface map of the carbonate aquifer are in west-central Ohio and near the southern limit of the aquifer along the border between Indiana and Ohio. The lowest potentiometric levels, less than or equal to 600 feet, are along the Wabash and Ohio Rivers and Lake Erie. Steady-state ground-water discharge was estimated for selected stream reaches by use of hydrograph-separation techniques. These estimates approximate the central tendency of base flows from a combination of bank-storage discharge and discharge from local, intermediate, and regional flow systems within the regional aquifer system. Base-flow duration curves were constructed from estimates of daily mean base flows to estimate the range of base flows in which discharge from the deep, stable intermediate and regional flow systems dominates streamflow.

• OSTI ID: 5805064
• Report Number(s): CONF-921058-; CODEN: GAAPBC
• Journal Information: Geological Society of America, Abstracts with Programs; (United States), Vol. 24:7; Conference: 1992 annual meeting of the Geological Society of America (GSA), Cincinnati, OH (United States), 26-29 Oct 1992; ISSN 0016-7592
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
54 ENVIRONMENTAL SCIENCES
AQUIFERS
HYDROLOGY
GROUND WATER
FLOW MODELS
INDIANA
OHIO
CARBONATE ROCKS
DEPOSITS
GLACIERS
HYDRAULIC CONDUCTIVITY
LIQUID FLOW
MAPPING
DEVELOPED COUNTRIES
FLUID FLOW
HYDROGEN COMPOUNDS
MATHEMATICAL MODELS
NORTH AMERICA
OXYGEN COMPOUNDS
ROCKS
SEDIMENTARY ROCKS
USA
WATER
580000* - Geosciences
540250 - Environment
Terrestrial- Site Resource & Use Studies- (1990-)