Monte Carlo Based Multi-Media Fate Model for the Great Lakes Ecosystem

These maps may be helpful in determining an emission rate for use in the model.

Disclaimer

These pesticide use maps show the average annual pesticide use intensity expressed as average kilograms of a pesticide active ingredient (a.i.) applied to each square mile of county area. The table inset shows the total number of kilograms of a pesticide active ingredient applied to the land within each lake watershed (without regard to county area). Pesticide use for each map is based on state-level estimates of pesticide use rates for individual crops that were compiled by the CropLife Foundation, Crop Protection Research Institute based on information collected during 1999 through 2004 and on 1997 Census of Agriculture county crop acreage from the National Agricultural Statistics Service (NASS). The maps do not represent a specific year, but rather show typical use patterns over the five year period 1999 through 2004. The key limitations of the data used to produce these maps include the following: (1) state use-coefficients represent an average for the entire state and consequently do not reflect the local variability of pesticide management practices found within states and counties, (2) pesticide use estimates are not for a specific year, but represent typical use patterns for a five year period, (3) state pesticide use coefficients may not have been available for all states where a pesticide may have been applied, and therefore, are not displayed on the maps, and (4) the county crop acreage is based on the 1997 Census of Agriculture and may not represent all crop acreage because of Census nondisclosure rules. The maps are not intended for making local-scale estimates of pesticide use, such as estimates at the county level. We utilized the USGS Method for Estimating Pesticide Use for calculating pesticide use data from the NCFAP and NASS datasets; however, we did not apply the more detailed mapped agricultural land from the 1992 USGS National Land Cover Data (NLCD) as described in the method. These maps do not take into account applications from Ontario, Canada.

2002 Great Lakes Toxic Air EmissionsHazardous Air Pollutant (HAP) maps:

The maps show the 2002 emissions of toxic air pollutants within the Grat Lakes watershed expressed as kilograms per square mile of county area symbolized from green to red. Emissions data was obtained from the 2002 Inventory of Toxic Air Emissions For the Great Lakes Region available from the Great Lakes Commission. This inventory contains emissions data for 195 toxic air pollutants, 171 of which were emitted within the Great Lakes Watershed boundary. The data is stored in the Regional Air Pollutant Inventory Development System (RAPIDS) and can be accessed through the Centralized Air emissions Repository On-Line CAROL program.

The table insert displays the total number of kilograms of a HAP emitted within each lake watershed. The emissions within each county are based on the proportion of that county's land area that lies within each of the Great Lakes watershed. For example, if a county is entirely within the Lake Erie watershed, 100% of the emissions from that county are reflected here as occuring in the Lake Erie watershed. If 30% of a county's area lies within the watershed and 70% does not, 30% of the emissions are included. Counties included in the emissions inventory, but lying outside the Great Lakes watershed are not included here. This table contains both US and Canadian data.


	Developed by the Syracuse Research Corporation Environmental Science Center under contract to the Great Lakes Commission's Great Lakes Air Deposition (GLAD) program, supported by the U.S. EPA .