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Differences in Phosphorus and Nitrogen Delivery to the Gulf of Mexico from the Mississippi River Basin

Article and supplemental material in Environmental Science and Technology

Press Release

Podcast

Maps and graphics

• Hypoxia in the Northern Gulf of Mexico
• Primary sources of nitrogen and phosphorus
• Nutrient contributions to the Gulf, by State
  • Table showing estimated State contributions, in descending order (more details are provided in the ES&T supplemental material, pages 22-25)
  • Maps showing States, grouped by four percent-share categories
• Stream size and reservoirs affect delivery to the Gulf
• Locations of monitoring stations used in USGS modeling

Frequently Asked Questions

Related links:

• USGS SPARROW model
• EPA Homepage on the Mississippi River Basin and Gulf of Mexico Hypoxia

For additional information on the study, please contact:

Richard Alexander
U.S. Geological Survey
12201 Sunrise Valley Drive, MS 413
Reston, Virginia 20192
Email: ralex@usgs.gov
Phone: (703)648-6869

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Page Last Modified: Tuesday, 04-Mar-2014 14:45:03 EST