National Water-Quality Assessment (NAWQA) Program

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Amounts and Sources of Nutrients Delivered to Estuaries in the Gulf of Mexico

Click on the watershed of interest to see maps of SPARROW model estimates of Total Nitrogen and Total Phosphorus loads and delivery to river basin outlets, estuaries, bays, and sounds in the Gulf of Mexico.

Total Nitrogen

index map Tampa Suwannee Apalachicola Pensacola Brazos Mobile East Mississippi West Mississippi Lake Borgne Barataria Atchafalaya Mermentau Calcasieu Sabine Galveston Matagorda San Antonio Aransas Lower Laguna Madre Upper Laguna Madre Corpus Christi

Total Phosphorus

index map Tampa Suwannee Apalachicola Pensacola Brazos Mobile East Mississippi West Mississippi Lake Borgne Barataria Atchafalaya Mermentau Calcasieu Sabine Galveston Matagorda San Antonio Aransas Lower Laguna Madre Upper Laguna Madre Corpus Christi

Additional information describing nutrient loads and delivery maps

Data Tables

Data Tables with estimates of total nitrogen and phosphorus delivered to estuaries draining into the Gulf of Mexico with the percent delivered by major source.

Online Decision Support System

explore the regional SPARROW models online to determine nutrient sources, track nutrient transport to downstream reservoirs and estuaries of interest, and evaluate combinations of nutrient reduction scenarios:

Related Links

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Page Last Modified: Wednesday, 09-Jan-2013 11:58:49 EST