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RECORD NUMBER: 254 OF 309

OLS Field Name OLS Field Data
Main Title Remote monitoring of organic carbon in surface waters {microform} /
Author Bristow, Michael. ; Nielsen, David
Other Authors
Author Title of a Work
Nielsen, David.
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher U.S. Environmental Protection Agency, Office of Research and Development, Environmental Monitoring Systems Laboratory ;
Year Published 1981
Report Number EPA-600/4-81-001
Stock Number PB81-168965
OCLC Number 28918200
Additional Subjects Remote sensing ; Water pollution ; Hydrocarbons ; Surface waters ; Raman spectroscopy ; Fluorescence ; Monitoring ; Concentration(Composition) ; Ultraviolet spectroscopy ; Equipment ; Nomographs ; Laser spectroscopy
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ERBD  EPA/600/4-81/001 NERL/ESD-LV Library/Las Vegas,NV 08/30/1997
NTIS  PB81-168965 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 93 p. : ill. ; 28 cm.
Abstract
This study shows that the intensity of the Raman normalized fluorescence emission induced in surface waters by ultraviolet radiation can be used to provide a unique remote sensing capability for airborne monitoring the concentration of dissolved organic carbon (DOC). Trace concentrations of hydrocarbons, both manmade and natural in origin, are the predominant source for this fluorescence. Water, on the other hand, is nonfluorescent under UV irradiation, but emits an intense Raman band of constant amplitude relative to the incident light. This Raman emission can be used as an internal reference or normalizing standard with which to correct the fluorescence emission for the effects of attenuation, for variations in system sensitivity, and for changes in sensor elevation. It is suggested that a direct calibration of the airborne fluorescence data in terms of equivalent DOC concentration be accomplished by making DOC measurements on samples obtained at a small number of reference sites under the aircraft flight path at the time of the airborne survey. Airborne laser fluorosensors that utilize this principle will provide a synoptic survey capability for rapidly and cost-effectively producing isopleth maps that show concentrations of surface water DOC. These isopleths can be used for delineating gradients, temporal changes and anomalies in the distribution of total dissolved organics in the surface layers of rivers, lakes and costal waters.
Notes
EPA-600/4-81-001. Feb. 1981. NTIS: PB81-168965. Includes bibliographical references.