Sources of Nutrients in the Nation’s Watersheds

Presentation Outline

Objective

Problem

Problem (Cont.)
Source inputs are documented, but watershed processes require a model.  There are good arguments for including processes:

Desirable properties of the watershed model:

SPARROW

Overview of SPARROW

Schematic of a Nested Basin

  Nutrient Sources

Process  Variables

Estimated Equation

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Model Evaluation

Results displayed for Hydrologic Cataloging Unit watersheds:

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Conclusions

Conclusions (continued)

Conclusions (continued)

Conclusions (continued)

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