Record Display for the EPA National Library Catalog

RECORD NUMBER: 45 OF 68

OLS Field Name OLS Field Data
Main Title Phytoplankton water quality relationships in U.S. lakes /
Author Miller, Glenn C. ; Zepp, Richard G.
Other Authors
Author Title of a Work
Taylor, W. D.
CORP Author Environmental Research Lab., Athens, GA.
Publisher National Eutrophication Survey, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1978
Report Number EPA/600/J-79/013
Stock Number PB-298 471
OCLC Number 54077236
Subjects Phytoplankton--United States. ; Lakes--United States.
Additional Subjects Sediments ; Water pollution ; Photolysis ; Reaction kinetics ; Mathematical models ; Ultraviolet radiation ; Attenuation ; Actinometry ; Photochemistry ; Light scattering ; Numerical solution ; Reprints
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-298 471 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation parts 1-6 : illustrations ; 28 cm.
Abstract
Data are presented concerning the effects of suspended sediments upon photolysis rates of dissolved ultraviolet (u.v.) absorbing pollutants. The malachite green leucocyanide actinometer was found to be a convenient and sensitive device for measurement of solar u.v. radiation (about 330nm) in sediment suspensions. Irradiance measurements by the actinometer were employed to compute diffuse attenuation coefficients for sediment suspensions from six natural water bodies in Georgia, Mississippi, and Montana. Specific attenuation coefficients were remarkably similar for all the sediments examined. Evidence is presented that large underestimates of photolysis rates result when beam attenuation coefficients of turbid water bodies are employed to compute the effects of light attenuation. Finally, it is demonstrated that photolysis rates within the photic zone are generally more rapid in turbid than in clear water. Enhanced photolysis rates in turbid waters are attributed to the increased diffuseness of light caused by scattering.
Notes
Includes bibliographical references. Microfiche.
Contents Notes
pt. 1. Methods, rationale, and data limitations.--pt. 2. Genera Acanthosphaera through Cystodinium collected from eastern and southeastern lakes.--pt. 3. Genera Dactylococcopsis through Gyrosigma collected from eastern and southeastern lakes.--pt. 4. Genera Hantzschia through Pteromonas collected from eastern and southeastern lakes.--pt. 5. Genera Quadrigula through Zygnema collected from eastern and southeastern lakes.--pt. 5. Genera Quadrigula through Zygnema collected from eastern and southeastern lakes.--pt. 6. The common phytoplankton genera from eastern and southeastern lakes.