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SPARROW-SPAtially Referenced Regressions On Watershed Attributes

Modeling of Surface-Water Quality

MODEL DESCRIPTION

A method for regional interpretation of water-quality monitoring data.

SPARROW estimated nitrogen export from watersheds Estimated nitrogen export (kg/km2/yr) for watersheds of the conterminous United States.

SPARROW relates in-stream water-quality measurements to spatially referenced characteristics of watersheds, including contaminant sources and factors influencing terrestrial and stream transport.

The model empirically estimates the origin and fate of contaminants in streams, and quantifies uncertainties in these estimates based on model coefficient error and unexplained variability in the observed data.

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U.S. Department of the Interior
U.S. Geological Survey
URL: http://water.er.usgs.gov/nawqa/sparrow/index.html
Last Modified: 16:29:00 Wed 14 April 2004
Maintainer: R.B. Alexander
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