Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Mathematical Models Associated with Point Line Source Discharges in Rivers.
Author Lin, Philip C. L. ;
CORP Author Environmental Monitoring and Support Lab.-Cincinnati, OH.
Year Published 1983
Report Number EPA-600/4-83-021;
Stock Number PB83-207373
Additional Subjects Water pollution ; Mathematical models ; Rivers ; Sampling ; Fluid flow ; Dispersions ; Sources ; Point sources ; Path of pollutants ; Numerical solution
Library Call Number Additional Info Location Last
NTIS  PB83-207373 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 56p
A literature search was conducted in the area of mass dispersion from instantaneous and continuous sources in bounded and unbounded flows. This study presents a mathematical model consisting of only two nondimensionalized variables and capable of generating universal concentration profiles of the pollutants in a rectangular channel flow for specified initial and boundary conditions. Determination of diffusion coefficients, mixing distance, sampling location and number of sampling points in a cross-section is possible. In other aspects, determination of the minimum sampling frequency required to collect a representative composite sample based on the previous effort is reexamined. It is concluded that a minimum sampling frequency of eight (8) for most of the flow and concentration patterns in the complete mixing zone is sufficient to provide enough accuracy for a representative sample collected by three out of four known compositing techniques.