An Examination of Winyah Bay,South Carolina Under Two Different Flow Conditions

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An Examination of Winyah Bay,South CarolinaUnder
Two Different Flow Conditions

• Kathryn Benson
• CE 394K GIS in Water Resources
• University of Texas at Austin
• Fall 2002

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OBJECTIVE To examine the mixing characteristics
of Winyah Bay, South Carolina under two different
streamflow conditions

• Where to start?
• Data Acquisition from the University of South
  Carolina
• EPA River Reach File-Region 03
• USGS Hydrologic Cataloging Unit

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Watershed Characteristics Second largest
watershed on the Atlantic Coast 3 States 12 HUCS
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Streamflow Conditions Five Main Rivers flow into
Winyah Bay Define streamflow for two days of
sampling High vs. average flow conditions due to
snowmelt Use of Time Series Function
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• WINYAH BAY, SC
• 68.3 km2 or 26.3 mi2
• Six sampling sites per day for ebbing tide
  (freshwater towards ocean)
• Interface between freshwater and saltwater is
  extended over approximately a 10 km area from the
  rivers to the mouth of Winyah Bay (Zabawa, 1979)
• Mixing point for low flow is WB499.9 Partially
  Mixed Estuary
• Mixing point for high flow is WB200.13 River
  Dominated Estuary

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CTD
What else does streamflow effect?
NISKIN
Chemical Processes Nutrient Concentrations Suspend
ed Material
Non-point Source Pollution
Point Source Pollution
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Higher Nutrient concentration
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Higher concentration of TSM with higher streamflow
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USGS website- HUCs, NHD, State geography and
waterbodies, gaging station and NWIS data
(http//www.usgs.gov) EPA website-surf your
watershed, river reach file (http//www.epa.gov) S
outh Carolina Department of Natural
Resources-orthophotos (http//dnr.state.sc.us)
ESRI-data library and help function
Correll, D.L., 1998. The Role of phosphorus in
the eutrophication of receiving waters A review.
Journal of Environmental Quality 27(2). Pp.
261-266.   Falhowski, P.G. and J.A. Raven, 1997.
Aquatic Photosynthesis. Blackwell Science, Lt.
2. pp. 310-311.   Horton, H.R., L.A. Moron, R.S.
Ocha, J.D. Rown, and K.G. Scriagaer, 1996.
Principles of Biochemistry 2nd edition.
Prentice-Hall, Inc. pp. 498-499.   Troup, B. N.
and Bricker, O. P, 1975. Processes Affecting the
Transport of Materials from the Continents to
Oceans. Marine Geochemistry in the Coastal
Environment American Chemical Society.   Zabawa,
Christopher F., 1979. Estuarine Sediments and
Sedimentary Processes in Winyah Bay, South
Carolina. South Carolina Geological Society
Geologic Notes 23(2). Pp. 79-117.
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Questions?