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Mississippi river could fight Gulf oil spill | There is finally a saviour for coastal wetlands of
Louisiana, currently threatened by the Gulf oil spill - the Mississippi river.
Louisiana wetlands "play a vital role in protecting New Orleans from hurricane
damage, providing habitat for wildlife, supporting economically important fisheries,
and maintaining water quality," says Efi Foufoula-Georgiou, director of NCED.
Scientists believe that Mississippi river's hydrology may help reduce oil onshore.
Robert Twilley and Guerry Holm of Louisiana State University (LSU) are investigating
the degree to which two delta wetland characteristics may help mitigate oil contamination.
The pair is performing baseline and damage assessments on the plants and soils
of, and comparing oil degradation processes in, freshwater and saltwater Louisiana
wetlands. "Since the Mississippi River is currently at a relatively high stage,
we expect the river's high volume of freshwater to act as a hydrologic barrier,
keeping oil from moving into the Wax Lake Delta from the sea," says Twilley. "The
Mississippi River's 'plumbing' provides a potential benefit to reducing the movement
of oil onshore from shelf waters," he adds. The plan is to build concrete gates
within the levees of the river to allow water to flow to specific coastal basins
and flood ways. However, as the river stage falls, the team will have to decide
the most optimum way of distributing this freshwater resource. |
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