Development of an environmental data base for rivers, lakes, and reservoirs
Titel:
Development of an environmental data base for rivers, lakes, and reservoirs
Auteur:
Hedden, Kenneth F. Skaggs, Richard L.
Verschenen in:
Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering
Paginering:
Jaargang 23 (1988) nr. 2 pagina's 103-126
Jaar:
1988-02
Inhoud:
One method for performing exposure assessments is to use mathematical models that predict the transport and transformations of toxic substances in the environment. To run these models, a variety of input data on receiving water-body properties and water-quality parameters that define a range of environments and influence the chemical-specific rate coefficients must be developed. A data base that contains selected hydrologic and water quality parameters has been developed by EPA for 15 major U.S. river basins. Called the Canonical Environments Data Base, the file brings together information developed by public and private organizations on each reach of the rivers as well as individual lakes and reservoirs in the basins. Coupling raw data with a data base management system in this environmental file will facilitate entry into and deletions from the data base and development of data input to the Exposure Analysis Modeling System (EXAMS) and other similar exposure assessment mathematical models. To assure compatibility with simplified process models, average monthly or seasonal values for each parameter are being stored in the data base. The structure of the data base is similar to that of the REACH File, and EPA-developed data base that defines the hydrolgoic connections between rivers, their tributaries, and associated lakes and reservoirs. This paper describes the development of the Canonical Environments Data Base and the hydrologic and water quality parameters that are included in the file.
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