Satellites Monitor Eutrophication of Estuaries

by David F. McGinnis, Jr., NOAA, Washington, DC, USA,
Karl-Heinz Szekielda, NOAA, Washington, DC, USA,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


In a study on eutrophication of estuaries, NOAA/AVHRR satellite data have been analyzed for the Changjiang River plume and the adjacent coastal areas. The different regimes identified in the satellite thermal image include river discharge, upwelling water, the Huanghai Sea Longshore Current, and warm water from the Taiwan Current. A feature in the offshore region is patches generated by the river discharge and upwelling process. By using different spectral channels, patterns created by bottom topography, sediment discharge from rivers and possible plankton blooms can be differentiated. These images indicate that the observed turbidity patterns are not necessarily caused by the outflow from the Changjiang River.

Subject Headings: Eutrophication | Satellites | Estuaries | Water discharge | Rivers and streams | Ocean currents | Aerial photography | Thermal pollution | Taiwan | Asia

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