Sources and Delivery of Nutrients to the Northwestern Gulf of Mexico from Streams in the South-Central United States.

摘要: Rebich, Richard A., Natalie A. Houston, Scott V. Mize, Daniel K. Pearson, Patricia B. Ging, and C. Evan Hornig, 2011. Sources Delivery of Nutrients to the Northwestern Gulf Mexico From Streams in South-Central United States. Journal American Water Resources Association (JAWRA) 47(5):1061-1086. DOI: 10.1111/j.1752-1688.2011.00583.x Abstract:  SPAtially Referenced Regressions On Watershed attributes (SPARROW) models were developed estimate nutrient inputs [total nitrogen (TN) total phosphorus (TP)] northwestern part from streams States (U.S.). This area included drainages Lower Mississippi, Arkansas-White-Red, Texas-Gulf hydrologic regions. The standardized reflect sources stream conditions during 2002. Model predictions loads (mass per time) yields generally greatest eastern region along reaches near Texas Louisiana shoreline. Mississippi River Atchafalaya watersheds, which drain nearly two-thirds conterminous U.S., delivered largest Mexico, as expected. However, three TN Trinity River/Galveston Bay, Calcasieu River, Aransas while TP Mermentau Bay watersheds. output indicated that atmospheric deposition (42%), commercial fertilizer (20%), livestock manure (unconfined, 17%). (28%), urban runoff (23%), (confined unconfined, 23%).