The ground-water resources in the Ross Barnett Reservoir area, Mississippi

Water-Resources Investigations Report 84-4160




The Ross Barnett Reservoir area occupies about 78 sq mi of a 490 sq mi study area northeast of the City of Jackson, MS. For several years, water use in the area has increased and during 1983 about 0.57 mil gal/day were obtained from groundwater sources. Virtually all groundwater in the area is used for public supplies. The principal aquifers currently used in the area are in the Sparta Sand and Cockfield Formations. The Sparta Sand is the most intensively developed and generally the highest yielding aquifer in the study area. Water level declines have averaged 2 to 3 ft/yr since 1940. The principal source of groundwater recharge to the aquifers is precipitation on outcrops of permeable strata northeast of the area. The base of freshwater is at the base of the Meridian-upper Wilcox aquifer except in the extreme northeast part of the area where the lower Wilcox aquifer contains freshwater. Water from the aquifers is suitable for public supply use without treatment except in a few places where iron concentrations are high, at from 0.10 to 9.3 mg/L. Excessive color is also a problem in the water from some wells in the area. Color was 20 units or greater in 8 of 25 wells sampled. (Author 's abstract)

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USGS Numbered Series
The ground-water resources in the Ross Barnett Reservoir area, Mississippi
Series title:
Water-Resources Investigations Report
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U.S. Geological Survey,
iv, 32 p. :ill., maps ;28 cm.