Publications

A statistical analysis of data from wells drilled into the crystalline rocks of the Piedmont and Blue Ridge provinces of North Carolina verified and refined previously proposed criteria for the siting of wells to obtain greater than average yields. An opportunity to test the criteria was provided by the expansion of the town of Cary's municipal ground-water system. Three criteria were...

Falls Lake, an 11,300-acre reservoir in the north-central Piedmont of North Carolina, was completed in December 1983. Hydrologic data were collected at seven inflow sites and one outflow site between 1982 and 1987 to define water-quality characteristics. Data include streamflow data and 56 physical and chemical characteristics of streamwater. Concentrations of some constituents at inflow...

No abstract available.

The numerous geologic formations and rock types in the Piedmont and Blue Ridge provinces of North Carolina have been grouped into 21 hydrogeologic units on the basis of their water-bearing potential as determined from rock origin, composition, and texture. All major classes of rocks--metamorphic, igneous, and sedimentary--are present, although metamorphic rocks are the most abundant. The...

The Albemarle-Pamlico estuarine system has a total basin area of nearly 31,000 square miles and includes the Neuse, Tar, Pamlico, Roanoke, Chowan, and Alligator Rivers, and the Albemarle, Pamlico, Currituck, Croatan, and Roanoke Sounds. Albemarle Sound receives the greatest freshwater inflow of all the sounds in the estuarine system. Inflow to this sound averages about 13,500 cubic feet...

No abstract available.

No abstract available.

Water resources data for the 1989 water year for North Carolina consists of records of stage, discharge and water quality of streams; stage and contents of lakes and reservoirs; and ground-water levels. This report contains discharge records for 178 gaging stations and stage and contents for 26 lakes and reservoirs; water quality for 26 gaging stations and 10 miscellaneous sites...

Unconsolidated sediments in Onslow and Jones Counties, North Carolina overlie crystalline basement rocks and range in thickness from about 700 ft to more than 1,800 ft, thickening toward the east. This material is composed of permeable sand and limestone interlayered with relatively impermeable clay and silt beds. Sediments are divided into two groups: aquifers in Quaternary-, and...

To fill an increasing need for reliable information on floods of various recurrence intervals on the Savannah River a flood-frequency relation was developed for the long-term gaging station at Augusta, Georgia. The flood-frequency analysis was complicated by the fact that the Savannah River upstream of Augusta has experienced increasing regulation of flow caused by three large dams...

Water level measurements were made in 95 wells open to the Black Creek aquifer at the end of 1986 to determine the configuration of its potentiometric surface over an area of about 4,900 sq mi in the central Coastal Plain of North Carolina. The altitude of the potentiometric surface of the Black Creek ranges between 80 and 100 ft above sea level along the western limit of the aquifer...

The Camp Lejeune Marine Corps Base occupies 164 square miles in the Coastal Plain of North Carolina, including 30 square miles of the New River estuary that bisects the Base. As much as 1,500 feet of unconsolidated or partly consolidated sand, limestone, silt, and clay beds that contain seven aquifers separated by six confining units underlie the Base. Freshwater is present in aquifers