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Modeling Atmospheric Nitrogen Deposition and Transport in the Chesapeake Bay Watershed

Scott A. Sheeder*,a, James A. Lynchb and Jeffrey Grimmc

a Environmental Resources Research Institute, 001 Land and Water Building, Pennsylvania State Univ., University Park, PA 16802
b School of Forest Resources, 311 Forest Resources Lab., Pennsylvania State Univ., University Park, PA 16802
c School of Forest Resources, 201 Forest Resources Lab., Pennsylvania State Univ., University Park, PA 16802



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  		Fig. 1. Diagram depicting the modeling procedure.

 


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  		Fig. 2. Example of wet nitrate nitrogen and ammonium nitrogen deposition model output for the Chesapeake Bay watershed.

 


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  		Fig. 3. Nitrogen export variability grid created from soil hydrologic group and land cover information. Each number corresponds to a unique combination of land cover and soil hydrologic group (i.e., cell value 22 represents low intensity developed land and soil hydrologic group B soils, 33 represents high intensity developed land and soil hydrologic group C soils, etc.).

 


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  		Fig. 4. Scatter plots of each of the regression models developed in the analysis.

 




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