Ground-water levels in the alluvial aquifer in eastern Arkansas, 1985

This report, prepared by the U.S. Geological Survey in cooperation with the Arkansas Soil and Water Conservation Commission, the U.S. Soil Conservation Service and local Conservation Districts, contains groundwater level measurements in 485 wells tapping the Mississippi River Valley alluvial aquifer of eastern Arkansas. The measurements were made by district Soil Conservation Service personnel during 1985. The purpose of this report is to provide these data to other State and Federal agencies as well as to private landowners. The shallowest pre-pumping water levels occurred in Clay, Independence, and Mississippi County where most water levels were within 20 feet of land surface. Counties where water levels of 100 feet below land surface or greater were measured included: Arkansas, Lonoke, Poinsett, and Prairie. Water-level measurements made during the post-pumping (recovery) season averaged 3.65 feet less than those made during the pre-pumping season. A comparison of pre-pumping water-level measurements made in 1984 to those made in 1985 shows an average rise of 1.0 foot within the area (Edds and Spencer, 1985). (USGS)