Regional Lagrangian Model of Air Pollution RELMAP

Other regional transport models, such as the Regional Lagrangian Model of Air Pollution (RELMAP Eder et al., 1986), use a different computational scheme than Eulerian models. In a Lagrangian model, the coordinate system moves with a parcel of air and mass balance of pollutant concentrations is computed on a parcel as it moves through space. [Pg.350]

Bullock (1997) used the Regional Lagrangian Model of Air Pollution (RELMAP) to simulate the emission, transport, chemical transformation, and wet and dry deposition of elemental mercury gas, divalent mercury gas, and particulate mercury from various point and area source types to develop an atmospheric mercury emissions inventory by anthropogenic source type. The results of the RELMAP model are shown in Table 5-3. On a percentage basis, various combustion processes (medical waste incinerators, municipal waste incinerators, electric utility power production [fossil fuel burning] and nonutility power and heat generation) account for 83% of all anthropogenic emissions in the United States. Overall, of the emissions produced, 41% were associated with elemental mercury vapor (Hg°), 41% with the mercuric form (Hg2+), and 18% was mercury associated with particulates. [Pg.427]

These chapters provide examples of the types of approaches that are needed to better understand contaminant fate and transport. Some examples of aquatic models currently in use include the EPA-funded Green Bay and Lake Michigan Mass Balance Studies (36), and Chesapeake Bay Water Quality Model (37,38), Models have also been developed for atmospheric transport of pollutants including the Regional Lagrangian Model of Air Pollution (RELMAP)and the Regional Acid Deposition Model (RADM) (39,40)... [Pg.11]