Skip to main content
U.S. flag

An official website of the United States government

Web Tools

Web Tools intro.

Mapping tools for the 2012 SPARROW models for the Pacific region

SPARROW mappers are interactive tools that allow users to explore river streamflow and nutrient and sediment loads and yields and the importance of different sources of contaminants in a particular river basin. Data can be visualized using maps and interactive graphs and tables, and rankings can be shown by state, major watershed, hydrologic unit (HUC), and catchment.