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Two Agricultural Production Data Libraries for Risk Assessment Models¹

ABSTRACT

Two data libraries based on the 1974 United States Census of Agriculture are described. The data packages (AGDATC and AGDATG) are available from the Radiation Shielding Information Center (RSIC), Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (contact: B. L. McGill, 615-574-6176 or FTS 624-6176). Agricultural production and land-use information by county (AGDATC) or by 1/2 by 1/2 degree longitude-latitude grid cell (AGDATG) provide geographical resolution of the data. The libraries were designed for use in risk assessment models that simulate the transport of radionuclides from sources of airborne release through food chains to man. However, they are also suitable for use in the assessment of other airborne pollutants that can affect man from a food ingestion pathway such as effluents from synfuels or coal-fired power plants. The principal significance of the data libraries is that they provide default location-specific food-chain transport parameters when site-specific information are unavailable. Plant food categories in the data libraries include leafy vegetables, vegetables and fruits exposed to direct deposition of airborne pollutants, vegetables and fruits protected from direct deposition, and grains. Livestock feeds are also tabulated in four categories: pasture, grain, hay, and silage. Pasture was estimated by a material balance of cattle and sheep inventories, forage feed requirements, and reported harvested forage. Cattle (Bos spp.), sheep (Ovis aries), goat (Capra hircus), hog (Sus scrofa), chicken (Gallus domesticus), and turkey (Meleagris gallopavo) inventories or sales are also tabulated in the data libraries and can be used to provide estimates of meat, eggs, and milk production. Honey production also is given. Population, irrigation, and meteorological information are also listed.

Key Words: agricultural parameters • terrestrial food chains • risk assessment • magnetic tapes

¹ Research sponsored by the Office of Radiation Programs, U.S. Environmental Protection Agency, ANR-460, Washington, DC 20460, under Interagency Agreement EPA-89-F-2-A106 under Contract no. DE-AC05-84OR21400 with Martin Marietta Energy Systems, Inc., U.S. Dep. of Energy. Although the research described in this report has been funded wholly or in part by the USEPA, it has not been subjected to the Agency's required peer and policy review, and therefore does not necessarily reflect the views of the Agency and no official endorsement should be inferred.

² Research scientist, Environmental Sciences Division; research scientist, Health & Safety Research Division; and computing specialists Computing & Telecommunications Division, respectively, Oak Ridge National Laboratory, P.O. Box X, Oak Ridge, TN 37831.

Received for publication May 31, 1983.