SPARROW: SPAtially Referenced Regressions on Watershed Attributes

National SPARROW Applications

Nutrient Applications in the Chesapeake Bay Watershed

National data applied to the Chesapeake Bay watershed

Version 1.0, late 1980s TN & TP

• Preston, S.D., and Brakebill, J.W., 1999, Application of Spatially Referenced Regression Modeling for the Evaluation of Total Nitrogen Loading in the Chesapeake Bay Watershed. U.S. Geological Survey Water-Resources Investigations Report 99-4054 12p.

• Brakebill, J.W., and Preston, S.D., 1999, -Digital Data Used to Relate Nutrient Input to Water Quality in the Chesapeake Bay Watershed, Version 1.0. U.S. Geological Survey Open-File Report 99-60

• 1987 Nutrient-Input Source Data
  Late 1980s Nutrient Yield Estimates (Under Construction)

Version 2.0, early 1990's, TN & TP

• Brakebill, J.W., Preston, S.D., and Martucci, S.K., 2001, Digital Data Used to Relate Nutrient Inputs to Water Quality in the Chesapeake Bay, Version 2.0. U.S. Geological Survey Open-File Report OFR-01-251, accessed at URL http://md.usgs.gov/publications/ofr-01-251/index.htm

• 1992 Nutrient-Input Source Data

• Early 1990s Nutrient Estimates

• Brakebill, J.W., and Preston, S.D., A Hydrologic Network Supporting Spatially Referenced Regression Modeling in the Chesapeake Bay Watershed, EPA's EMAP Symposium 2001: Coastal Monitoring Through Partnerships, Environmental Monitoring and Assessment [81:1-3] 73-84 403p.

Version 3.0, late 1990s, TN & TP

• Brakebill, J.W., Preston, S.D., 2004, Digital Data Used to Relate Nutrient Inputs to Water Quality in the Chesapeake Bay, Version 3.0. U.S. Geological Survey Open-File Report OFR-2004-1433, accessed at URL http://md.water.usgs.gov/publications/ofr-2004-1433/

• 1997 Nutrient-Input Source Data

• Late 1990s Nutrient Estimates