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  • 1
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    Mapping of chlorophyll a distributions in coastal zones (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: It is pointed out that chlorophyll a is an important environmental parameter for monitoring water quality, nutrient loads, and pollution effects in coastal zones. High chlorophyll a concentrations occur in areas which have high nutrient inflows from sources such as sewage treatment plants and industrial wastes. Low chlorophyll a concentrations may be due to the addition of toxic substances from industrial wastes or other sources. Remote sensing provides an opportunity to assess distributions of water quality parameters, such as chlorophyll a. A description is presented of the chlorophyll a analysis and a quantitative mapping of the James River, Virginia. An approach considered by Johnson (1977) was used in the analysis. An application of the multiple regression analysis technique to a data set collected over the New York Bight, an environmentally different area of the coastal zone, is also discussed.
    Keywords: ENVIRONMENT POLLUTION
    Type: Photogrammetric Engineering and Remote Sensing; 44; May 1978
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Remote sensing and spectral analysis of plumes from ocean dumping in the New York Bight Apex (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The application of the remote sensing techniques of aerial photography and multispectral scanning in the qualitative and quantitative analysis of plumes from ocean dumping of waste materials is investigated in the New York Bight Apex. Plumes resulting from the dumping of acid waste and sewage sludge were observed by Ocean Color Scanner at an altitude of 19.7 km and by Modular Multispectral Scanner and mapping camera at an altitude of 3.0 km. Results of the qualitative analysis of multispectral and photographic data for the mapping, location, and identification of pollution features without concurrent sea truth measurements are presented which demonstrate the usefulness of in-scene calibration. Quantitative distributions of the suspended solids in sewage sludge released in spot and line dumps are also determined by a multiple regression analysis of multispectral and sea truth data.
    Keywords: ENVIRONMENT POLLUTION
    Type: Remote Sensing of Environment; 9; May 1980
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    NASA TECHNICAL REPORTS
  • 3
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    Quantitative analysis of aircraft multispectral-scanner data and mapping of water-quality parameters in the James River in Virginia (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Statistical analysis techniques were applied to develop quantitative relationships between in situ river measurements and the remotely sensed data that were obtained over the James River in Virginia on 28 May 1974. The remotely sensed data were collected with a multispectral scanner and with photographs taken from an aircraft platform. Concentration differences among water quality parameters such as suspended sediment, chlorophyll a, and nutrients indicated significant spectral variations. Calibrated equations from the multiple regression analysis were used to develop maps that indicated the quantitative distributions of water quality parameters and the dispersion characteristics of a pollutant plume entering the turbid river system. Results from further analyses that use only three preselected multispectral scanner bands of data indicated that regression coefficients and standard errors of estimate were not appreciably degraded compared with results from the 10-band analysis.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TP-1021 , L-10968
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Location, identification, and mapping of sewage sludge and acid waste plumes in the Atlantic coastal zones (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: ENVIRONMENT POLLUTION
    Type: In: Joint Conference on Sensing of Environmental Pollutants; Nov 06, 1977 - Nov 11, 1977; New Orleans, LA
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  • 5
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    Remote sensing and laboratory techniques for monitoring ocean dumping (1977)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Results of field experiments conducted in the Atlantic Coastal Zone indicate that plumes resulting from ocean dumping of acid waste and sewage sludge have distinguishable spectral characteristics when the radiance of the pollutant is normalized (ratioed to) background ocean water. Acid waste spectra peak between 550-650 nm while sewage sludge spectra have peak values at wavelengths of about 700 nm or greater. Results indicate that identification of acid waste and sewage sludge plumes may be independent of geographical location in the Atlantic Coastal Zone. Radiance ratio curves obtained in the laboratory qualitatively agree with those obtained from field experiments. Results from the July 25, 1977, Galveston Deep Ocean Dump Site experiment show the radiance ratio curve of the biodigested industrial waste to be fairly flat and similar to the radiance ratio curves of sewage sludge line dumps and sewage sludge spot dumps that have been in the water for several hours.
    Keywords: ENVIRONMENT POLLUTION
    Type: Fall Meeting; Dec 05, 1977 - Dec 09, 1977; San Francisco, CA
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    NASA TECHNICAL REPORTS
  • 6
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    A Simulation Model for Studying Effects of Pollution and Freshwater Inflow on Secondary Productivity in an Ecosystem (1974)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: A mathematical model of an ecosystem is developed. Secondary productivity is evaluated in terms of man related and controllable factors. Information from an existing physical parameters model is used as well as pertinent biological measurements. Predictive information of value to estuarine management is presented. Biological, chemical, and physical parameters measured in order to develop models of ecosystems are identified.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TM-X-72169
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Quantitative mapping of chlorophyll a distributions in coastal zones by remote sensing (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results of experiments conducted in the James River, Virginia and the New York Bight indicate that concurrently collected sea-truth measurements may be used to calibrate remotely sensed multispectral scanner data collected over each of these environmentally different scenes. Statistical stepwise regression analysis was used in both experiments to incorporate significant bands of MSS data into regression equations that quantitatively relate remotely sensed data to water quality parameters, such as chlorophyll a and suspended sediment. These regression equations are used to map synoptic distributions of chlorophyll a in the remotely sensed scenes.
    Keywords: ENVIRONMENT POLLUTION
    Type: ASP 77-160 , Annual Meeting of the American Society of Photogrammetry; Feb 27, 1977 - Mar 05, 1977; Washington, DC
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    NASA TECHNICAL REPORTS
  • 8
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    Application of aircraft multispectral scanners to quantitative analysis and mapping of water quality parameters in the James River, Virginia (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: ENVIRONMENT POLLUTION
    Type: Symposium on Minor Constituents and Excited Species; Jun 08, 1976 - Jun 19, 1976; Philadelphia, PA; US|Symposium on Minor Constituents and Excited Species; Jun 09, 1976 - Jun 10, 1976
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  • 9
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    Multispectral analysis of ocean dumped materials (1977)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Remotely sensed data were collected in conjunction with sea-truth measurements in three experiments in the New York Bight. Pollution features of primary interest were ocean dumped materials, such as sewage sludge and acid waste. Sewage-sludge and acid-waste plumes, including plumes from sewage sludge dumped by the 'line-dump' and 'spot-dump' methods, were located, identified, and mapped. Previously developed quantitative analysis techniques for determining quantitative distributions of materials in sewage sludge dumps were evaluated, along with multispectral analysis techniques developed to identify ocean dumped materials. Results of these experiments and the associated data analysis investigations are presented and discussed.
    Keywords: ENVIRONMENT POLLUTION
    Type: International Symposium on Remote Sensing of Environment; Apr 25, 1977 - Apr 29, 1977; Ann Arbor, MI
    Format: text
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