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The use of near-infrared photography for biodegradable pollution monitoring of tidal riversOn October 2, 1972, a pattern of chlorophyll a containing phytoplankton (algae) was detected from 3-km altitude in a series of near-infrared photographs of the Potomac River 'Salt Wedge Area.' Densitometer traces over the film images, related to in situ measurements of chlorophyll a concentrations that varied from 4 to more than 3000 micrograms/liter, revealed a phytoplankton 'bloom' threshold in the near infrared between the concentration of 34 and 51 micrograms/liter. The photography also revealed bottom features through two meters of water and made it possible to integrate chlorophyll a concentrations over a 16 sq km area to demonstrate this remote sensing technique for biodegradable pollution monitoring.
Document ID
19740038735
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bressette, W. E. (NASA Langley Research Center Hampton, Va., United States)
Lear, D. E., Jr. (U.S. Environmental Protection Agency, Annapolis Field Office, Annapolis Md., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Geophysics
Meeting Information
Meeting: Fall Convention of the American Society of Photogrammetry
Location: Lake Buena Vista, FL
Start Date: October 2, 1973
End Date: October 5, 1973
Accession Number
74A21485
Distribution Limits
Public
Copyright
Other

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