Hydrologic and water-quality
data in selected agricultural drainages in Beaufort and Hyde Counties,
North Carolina, 1988-90
Open-File Report
92-498
By M.W. Treece, Jr. and J.D. Bales
Abstract
An investigation was begun in North Carolina 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, three
canals in Beaufort County, and in Campbell Creek, which
receives drainage directly from two of the Beaufort County
canals. Water-control structures were placed on two of the six
canals near the beginning of the investigation. Following about
2 years of data collection, control structures were placed on
the remaining four canals. Hydrologic and water-quality data are
presented for each of the study sites for the period of October
1990 through May 1992. Data presented in this report cover the
second phase of the investigation after the installation of
water-control structures in the six drainage canals. Following a
description of the study sites and data-collection methods, data
are presented for five of the drainage canals and Campbell
Creek. Data collection was discontinued at one of the Beaufort
County sites after the first phase of the investigation. The
data collected include: (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 in Campbell Creek.
Citation:
Treece, M.W., Jr., and Bales, J.D., 1992, Hydrologic and water-quality data in selected agricultural drainages in Beaufort and Hyde Counties, North Carolina, 1988-90: U.S. Geological Survey Open-File Report 92-498, 89 p.
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