Hydrologic and water-quality data in selected
agricultural drainages in Beaufort and Hyde Counties, North Carolina,
1990-92
Open-File Report 93-78
By M.W. Treece, Jr.
Abstract
An investigation was begun in 1988 to: (1) quantify nutrient,
sediment, and freshwater loadings in canals that collect
drainage from cropland field ditches; (2) determine the effects
of tide gates and flashboard risers on these loadings and on
receiving water quality; and (3) characterize the effects of
drainage on the salinity regime of a tidal creek. Data were
collected in three canals in Hyde County, two canals in Beaufort
County, and in Campbell Creek, which receives drainage directly
from the Beaufort County canals. A tide gate was placed in one
of the Hyde County canals near the beginning of the
investigation. In August 1990 following more than 2 years of
data collection, control structures were placed in the remaining
two Hyde County canals. Flashboard risers were installed in the
Beaufort County canals in April 1991. Hydrologic and water
quality data are presented for each of the study sites for the
period of October 1990 through May 1992. Following a description
of the study sites and data collection methods, data are
presented for the five drainage canals and Campbell Creek. The
data collected included: (1) daily values of accumulated
precipitation; (2) water level statistics; (3) daily mean values
of discharge in the canals; (4) biweekly water quality
measurements and sample analyses; (5) storm-event water quality
measurements and sample analyses; (6) continuous records of
specific conductance in the canals; (7) vertical profiles of
salinity in Campbell Creek; and (8) daily mean values of
salinity at five sites at Campbell Creek.
Citation:
Treece, M.W., Jr., 1993, Hydrologic and water-quality data in selected agricultural drainages in Beaufort and Hyde Counties, North Carolina, 1990-92: U.S. Geological Survey Open-File Report 93-78, 96 p.
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