Hydrogeologic and Geochemical Investigation of the Boone-St. Joe Limestone Aquifer in Benton County, Arkansas

摘要

Results from thirty-nine pumping tests and well samples were used to study the hydrogeology and hydrochemistry of an important shallow, surface exposed aquifer in northwest Arkansas, the Boone-St. Joe limestone aquifer. The aquifer has two formations, the upper Boone Limestone, and the lower St. Joe Limestone. Parameters determined by the pumping tests include permeability, coefficient of transmissibility, and specific capacity. Coefficient of transmissibility results varied from 24.8 to 24,640 gpd/ft and specific capacity ranged from 0.03 to 30 gpm/ft showing a large range in production capability. Groundwater from the aquifer is poor showing high fecal streptococcus counts and high levels of nitrates, chloride, phosphate and sulfate.