Water quality monitoring by thematic mapper in coastal environments. A performance analysis of local biooptical algorithms and atmospheric correction procedures

Journal Article · Sun Aug 01 00:00:00 EDT 1993 · Remote Sensing of Environment; (United States)

DOI:https://doi.org/10.1016/0034-4257(93)90041-U· OSTI ID:6283094

Tassan, S ^[1]; d'Alcala, M R ^[2]

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1. Commission of the European Communities, Ispra (Italy). Inst. for Remote Sensing Applications
2. Stazione Zoologica, Napoli (Italy). Biological Oceanography Lab.

The Thematic Mapper (TM) sensor's ability to monitor localized phenomena associated with anthropogenic pollution in coastal waters has been investigated with reference to experimental data collected on a test site in the Gulf of Naples. In situ measurements yielded the biooptical algorithms for chlorophyll and sediment retrieval as well as an optical model for the computation of the subsurface reflectance as a function of water composition, specific to the site. The algorithms' performance was assessed through a sensitivity analysis, taking into account the correlation among chlorophyll, sediment, and yellow substance contents, as well as the stratification characteristics of the water body. Sensitivity analysis techniques were similarly used to evaluate the performance in the coastal environment of three atmospheric correction models, which assume uniform aerosol load and composition, uniform aerosol composition, and varying aerosol load and composition, respectively. A comparison with sea-truth data collected for the Land-sat overpass of 22 June 1988 showed a satisfactory correspondence between measured concentrations and concentrations retrieved from the TM data using the above atmospheric correction procedures and local biooptical algorithms. Consistent with the indications of the sensitivity analysis, the best agreement was obtained by the atmospheric model assuming varying aerosol load and composition.

• OSTI ID: 6283094
• Journal Information: Remote Sensing of Environment; (United States), Vol. 45:2; ISSN 0034-4257
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AEROSOLS
CHEMICAL COMPOSITION
ITALY
WATER POLLUTION
REMOTE SENSING
WATER QUALITY
ALGORITHMS
CHLOROPHYLL
COASTAL WATERS
CORRELATIONS
LANDSAT SATELLITES
SEDIMENTS
SENSITIVITY ANALYSIS
CARBOXYLIC ACIDS
COLLOIDS
DEVELOPED COUNTRIES
DISPERSIONS
ENVIRONMENTAL QUALITY
EUROPE
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
MATHEMATICAL LOGIC
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYTOCHROMES
PIGMENTS
POLLUTION
PORPHYRINS
PROTEINS
SATELLITES
SOLS
SURFACE WATERS
WESTERN EUROPE
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)