Geology topics
Charles W. Smoot
Publications and source records attributed to Charles W. Smoot.
Louisiana ground-water map no. 6: Potentiometric surface, 1990, and water-level changes, 1974-90, of the Mississippi River alluvial aquifer in northeastern Louisiana
The Mississippi River alluvial aquifer is the largest source of fresh ground water in northeastern Louisiana. In 1990, an average of 170 million gallons per day was withdrawn from the aquifer in 12 northeast Louisiana parishes. Additional knowledge about ground-water flow and the effects of withdrawals on the Mississippi River alluvial aquifer is needed for future ground-water development and protection of the resource. Generalized contours of the altitude of water levels in September 1990 and changes of water levels from 1974 to 1990 in the Mississippi River alluvial aquifer in northeastern Louisiana are shown on maps. Water-level trands in the aquifer are shown in hydrographs of selected wells.
Louisiana ground-water map no. 8; potentiometric surface, 1991, of the Carrizo-Wilcox Aquifer in northwestern Louisiana
In northwestern Louisiana, the Carrizo-Wilcox aquifer is the primary source of ground water within six parishes (Bossier, Caddo, De Soto, Natchitoches, Red River, and Sabine) and the secondary source in parts of three other parishes (Bienville, Claiborne, and Webster). Withdrawals from the aquifer increased from 4.7 Mgal/d (million gallons per day) in 1965 to 13.3 Mgal/d in 1990. A map of the potentiometric surface indicates that the altitudes of water levels in the Carrizo-Wilcox aquifer ranged from less than 100 feet to 300 feet above sea level in November and December 1991. The direction of ground-water flow within the aquifer generally is to the southeast and east or west to the Red River Valley.
Generalized potentiometric surfaces of the Red River alluvial aquifer, pool 1, Red River waterway area, central Louisiana
No abstract available.
Louisiana hydrologic atlas map No. 4; geohydrologic sections of Louisiana
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Louisiana hydrologic atlas map no. 3: Altitude of the base of freshwater in Louisiana
No abstract available.
Louisiana hydrologic atlas map no. 2: Areal extent of freshwater in major aquifers of Louisiana
The areal availability of freshwater (cl content < 250 mg/L) in 14 major aquifers in Louisiana was investigated. The depth of occurrence of fresh groundwater in Louisiana is variable. The aquifers were mapped to show their areal extent from the outcrop or subcrop to the downdip limit of freshwater. Water in each aquifer becomes saline downdip; but in most areas an overlying (younger) aquifer contains freshwater. None of the major aquifer contains freshwater in northern Louisiana where the Vicksburg and Jackson groups crop out and the underlying Cockfield aquifer (Cockfield Formation) contains saline water.