NAWQA Nutrient Synthesis Past, Present, and Future. USGS Workshop on Nutrient Processes in the Upper Mississippi River Basin UMESC, LaCrosse, WI March 25 – 26, 2002 Jeff Stoner Dave Mueller Norm Spahr Tom Nolan Barb Ruddy Mark Munn Richard Alexander. NAWQA Past 1992 - 2000.
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USGS Workshop on Nutrient Processes in the Upper Mississippi River Basin
UMESC, LaCrosse, WI
March 25 – 26, 2002
Streams (NO3+NO2, NO2, NH4+OrgN, NH4, TN, DP, OPO4, TP, DOC, SOC)
Ground water (NO3+NO2, NO2, NH4, OPO4, DOC)
Stream habitat, basin and well characteristics, soils, geology, land use and cover, chemical use
Predicted Nitrate (mg / L)
Water years 1994-95
Mixed Land Use
To be published in ES&T,
B.T. Nolan and others, 2002
draining agricultural areas
Interrelations Between Physical, Chemical and Biological Variables, even for Large Rivers, may best be Explained by Study-Unit Investigators
Nitrite + nitrate
on Main Stem TN and TP Concentrations
Sources and Transport of Agricultural Chemicals in Streams and Ground Water
Effects of Nutrient Enrichment on Agricultural Streams
Combinations of colors indicate multiple
seasons of high concentrations, ex. winter-spring
Compare: 505 to 145 sites; 1st to 2nd decade
(2001 – 2010+)
(2001 – 2010+)
Determine how biological communities and processes respond to varying levels of nutrient enrichment in agricultural streams from contrasting environmental settings.
Land UseNutrients SedimentPesticides
Wooded riparian corridors
DO, pH, SOC relations
Fish & Wildlife
GW-SW relationsSoil Permeability
Precip – Potential evapotranspiration
Large and consistent nutrients data base for streams and ground water at multiple scales.
Relations to broad categories of land use.
Continue status of nutrients conditions and improve confidence in statistical correlations to land use on other physical factors.
A consistent look at time trends and why.
Improve understanding of biogeochemical processes within streams and near hyporheic zones (NEET) .Summary NAWQA Nutrients Synthesis