Nutrient load characterization from integrated source data for the lower Mississippi River

James E. Bollinger, Laura J. Steinberg, Andrew J. Englande, James P. Crews, Janet M. Hughes, Cruz Velasco, Karen H. Watanabe, William R. Hartley, Christopher M. Swalm, Jeffrey M. Mendler, Lu Ann E. White, William J. George

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Nutrient data from all available sources for the lower Mississippi River were examined for potential differences among sampling agencies and geographic locations for the period between 1960 and 1998. Monthly means grouped by parameter, sampling location and agency, were calculated and compared as paired sets. Excluding those months where data were not available for both sets. Some significant differences were found between various agencies collecting nutrient data on the river, as well as between various stretches of river, especially in the case of phosphorus nutrient data. Results were used to synthesize data sets from which a history of nutrient loading in the Mississippi River was determined. General trends in nitrate+nitrite, total Kjeldahl nitrogen, orthophosphate, total phosphorus and silica loads, as well as changes in nutrient proportions and the specific limiting nutrient (by month) are reported. This study provides a useful summary of contemporary and historical nutrient data that may assist in the evaluation of Mississippi River water quality and its potential effect on the Gulf of Mexico.

Original languageEnglish (US)
Pages (from-to)1375-1390
Number of pages16
JournalJournal of the American Water Resources Association
Issue number6
StatePublished - 2000
Externally publishedYes


  • Gulf of Mexico
  • Hypoxia
  • Mississippi River
  • Nutrient loads
  • Water pollution
  • Water quality

ASJC Scopus subject areas

  • Ecology
  • Water Science and Technology
  • Earth-Surface Processes


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