CRWR Online Report 2003-4
Nueces Bay TMDL Project for Zinc in Oyster Tissue
By Imane Mrini, M.S.E. and David R. Maidment
ABSTRACT
Nueces Bay is on the 303(d) list of impaired water bodies for
not meeting the oyster water use due to elevated zinc concentrations in oyster
tissue. This work is a preliminary study for the Nueces Bay TMDL project.
Information and data about zinc concentrations in water, sediments, oyster
tissue and contributing point and non-point sources of zinc in Nueces Bay, are
compiled and analyzed. Zinc loadings are determined for each contributing point
and non-point source, and a simple water quality-loading model is used to
simulate equilibrium concentrations of total zinc in Nueces Bay. Two
Continuously Stirred Tank Reactor (CSTR) model scenarios are performed, where
loads from the Corpus Christi Inner Harbor through the Central Power and Light
(CP&L) station are excluded in the first scenario, and included in the second.
Results of the CSTR modeling indicate that high total zinc concentrations in
Nueces Bay may be due to the water discharged by the CP&L station from the
Corpus Christi Inner Harbor.
CRWR Online Report 2003-4
Nueces Bay TMDL Project for Zinc in Oyster Tissue
By Imane Mrini, M.S.E. and David R. Maidment
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