Linkage between an Advanced Air Quality Model and a Mechanistic Watershed Model
Krish Vijayaraghavan1*, Joel Herr2*, Shu-Yun Chen1, Eladio M. Knipping3 and Robert Goldstein3
Historically the air quality modeling and watershed modeling communities have tended to operate in distinct spheres. However, in cases where water quality and subsequent ecosystem impairment is due, in part, to atmospheric deposition, it is useful to directly link the effect of atmospheric sources to water quality. Also, air monitoring data required by watershed models are often sparse. These two issues are addressed in this work wherein we describe the development of a software linkage between an air quality model and a watershed model: (1) AMSTERDAM (the Advanced Modeling System for Transport, Emissions, Reactions and Deposition of Atmospheric Matter) and (2) WARMF (the Watershed Analysis Risk Management Framework). AMSTERDAM is a state-of-the-science 3-D multi-pollutant air quality model derived from EPA’s Community Multiscale Air Quality model (CMAQ). WARMF is an advanced model and decision support system for watershed planning and Total Maximum Daily Load (TMDL) analysis. Results from this multi-media framework are presented to compare the effect of measured and modeled meteorology and dry and wet deposition of gaseous and particulate sulfur and nitrogen species on flow rates and aqueous concentrations of these species in the Catawba River Watershed in North and South Carolina.
1 Atmospheric & Environmental Research, Inc. (AER), 388 Market Street, San Francisco, CA 94111
2 Systech Water Resources, Inc., 1200 Mount Diablo Blvd, Suite 102, Walnut Creek, CA 94596
3 EPRI, 3420 Hillview Avenue, Palo Alto, CA 94304
1* Krish Vijayaraghavan, Atmospheric & Environmental Research, Inc. (AER), 388 Market Street, San Francisco, CA 94111, Email:
2* Joel Herr, Systech Water Resources, Inc., 1200 Mount Diablo Blvd, Suite 102, Walnut Creek, CA 94596, Email: