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Multichannel seismic-reflection profiles collected in 1977 off the Northern California and Oregon coast

Open-File Report 86-406

By:
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Abstract

Groundwater level measurements were made in 690 observation wells in Arkansas in the spring of 1986. In addition, well hydrographs are given for aquifers in the Quaternary deposits and the Sparta Sand, the most important aquifers with respect to groundwater availability and use in Arkansas. Water levels in the Quaternary deposits in the 25 heavily irrigated counties of eastern Arkansas overall rose 1.3 feet between 1981 and 1986. The average rise in water levels from 1981 to 1986 reflects, at least in part, the recovery of water levels in the Quaternary deposits, following the drought of 1980 and is in contrast to the long-term declines that persist in many parts of eastern Arkansas. In Arkansas, Columbia, Jefferson, Ouachita, and Union Counties where withdrawals from the Sparta aquifer are greatest water-level changes ranged from a decline of 1.5 feet to a rise of 7.9 feet between 1981 and 1986. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Multichannel seismic-reflection profiles collected in 1977 off the Northern California and Oregon coast
Series title:
Open-File Report
Series number:
86-406
Edition:
-
Year Published:
1986
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
4 p. :maps ;28 cm.