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Abstract Ozbay, G. and C. Cawley.
2008. Highway Retention Pond Effects on Water Quality at DSU Outreach and
Research Farm in A study was undertaken to determine the impact of effluent from
a DELDOT retention pond on the water quality of a stream at the DSU Outreach
and Research Farm in Smyrna (SORC). The new DSU Aquaculture Research Facility
will be built at the farm raising the question of whether the stream water
would be suitable for farm use. Water quality was tested every two weeks for
9 months at sampling sites including the outflow from the retention pond, the
farm ditch above the outflow, between the ditch and stream, and at the
confluence of the ditch and stream. The study shows that pH decreased from 9
to below 5 in winter and late summer, and more than 90% of the water tested
at all sites had alkalinity levels below 20mg/L. Dissolved oxygen levels were
about 4.0mg/L during the summer months between the ditch and stream, and at
the confluence of the ditch and stream.
More than 50% of the samples collected at the confluence of the ditch
and stream site had total phosphorus concentrations higher than the total
maximum daily loads for streams, 0.05mg/L. The study concludes that water
quality will not be ideal for freshwater species because of stress due to low
pH, alkalinity and eutrophication during low flow events. It is therefore
recommended that long term water quality monitoring should continue to ensure
proper environmental conditions for fish and farm animal production. |
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