Our Dead Zone Largest Ever This Year!

Congratulations! We Are Breaking Another Record: Our Dead Zone in Gulf of Mexico

Alas, the cost of Midwest flooding, the multibillion-dollar crop losses, doesn’t include the damage to our coastal waters and the marine “manna.”

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Summertime satellite observations of ocean color from MODIS/Aqua show highly turbid waters which may include large blooms of phytoplankton extending from the mouth of the Mississippi River all the way to the Texas coast. When these blooms die and sink to the bottom, bacterial decomposition strips oxygen from the surrounding water, creating an environment very difficult for marine life to survive in. Reds and oranges represent high concentrations of phytoplankton and river sediment. Image taken by NASA and provided courtesy of the NASA Mississippi Dead Zone web site.

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The annual dead zone, which stretches from Texas to Louisiana coasts, could grow to about 9,000 square miles (23,300 km²), nearly double the annual average since 1990 of about 4,800 square miles.

This year’s record dead zone is caused by inordinate demand for corn and soybeans which are used to make ethanol to boost gasoline supplies, and by the earlier Midwest flooding.

The massive increases in the use of fertilizers in Midwestern corn country results in the fertilizer run-off that flow down the Mississippi River into the Gulf of Mexico. Nitrogen and phosphorus, the main constituents of fertilizers, promote excessive growth and decay of algae which cause severe reductions in water quality. The decaying aquatic vegetation or phytoplankton (an algal bloom) sinks to the bottom of the waters in the Gulf and is broken down by bacteria which consume the dissolved oxygen in the water and produce carbon dioxide.

The bacterial respiration process kills fish, clams, crabs, shrimp, zooplankton and all other species that swim in the water or dwell on the bottom of the Gulf [and other water bodies] creating dead zones.

Red algae completely covers this municipal reservoir. Credit: CASF. Photo date: July 14, 2008. Licensed under Creative Commons Attribution-Share Alike 3.0 United States License.

“We’re planting an awful lot of corn and soybeans,” said Eugene Turner, a scientist at Louisiana State University. “It rinses off easily when there is a rain.”

“Excess nutrients from the Mississippi River watershed during the spring are the primary human-influenced factor behind the expansion of the dead zone,” said Rob Magnien, director of the NOAA Center for Sponsored Coastal Ocean Research.

One-third of this year’s U.S. corn crop, or 4 billion bushels, will go to make the alternate fuel ethanol, the U.S. government has projected, compared to 3 billion bushels of the 2007 crop. Reuters reported.

Related News Links:

Gulf of Mexico “dead zone” to hit record size: NOAA

Related Links:

• Dead Zones
• Our Oceans [Index Page]
• The Eight Steps that Help Kill More of Our Fish

• Dead Zone – General Collection

• Marsification of Earth

Mississippi Levees Breached in 23 Places

A Shrinking World Series

‘We are seeing a historic hydrological event taking place with unprecedented river levels occurring.’ —Brian Pierce, meteorologist, National Weather Service.

Mississippi river surges over at least 23 levees and another 30 barriers are at risk, as the Midwest floods move south.

In 1993, devastating floods, sweeping down Missouri and Mississippi rivers, surged levees and destroyed communities from St. Louis to northern Louisiana.

Mississippi River floodwaters engulf a farm about 15 miles north Quincy, Ill. after the south portion of the Indian Graves levee breached. (Tribune photo by Michael Tercha / June 18, 2008). Image may be subject to copyright. See FEWW Fair Use Notice!

Midwest Flood Victims Feel Misled by Feds

“They all told us, `The levees are good. You can go ahead and build,”‘ said Parks, who did not buy flood coverage because her bank no longer required it. “We had so much confidence in those levees.”

“People put all their hopes in those levees, and when they do fail, the damage is catastrophic,” said Paul Osman, the National Flood Insurance Program coordinator for Illinois. “New Orleans is the epitome; a lot of those people didn’t even realize they were in a floodplain until the water was up to their roofs.”

“We reported to the president in ’94 that the levee system was in disarray, the levees were not high enough to take care of any potential problem. People didn’t understand their flood risk and there wasn’t good co-ordination across federal, state and local governments,” said Gerald Galloway, a professor of engineering and flood control expert.

“The same thing applies today,” Galloway said. “It’s amazing that in the face of [Hurricane] Katrina and now this particular challenge that we continue to relearn the same lessons.”

Galloway’s recommendations to improve the levee system were basically ignored. He said that he’s experiencing much the same response now from officials as in 1993.

Related Links:

• Floods
• China “Frankenstein”
• Midwest Flood Victims Feel Misled by Feds
• More levees at risk from surging Mississippi as Bush tours flood areas

• Drought (Index Page)
• In Spain, Water Is a New Battleground
• California ‘Mojavefied’ by 2011?
  

• First Wave of World’s Collapsing Cities

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