Detecting anthropogenic and natural disturbances in wetland ecosystems with multitemporal ERS 2 data

Details Detecting anthropogenic and natural disturbances in wetland ecosystems with multitemporal ERS 2 data Detecting anthropogenic and natural disturbances in wetland ecosystems with multitemporal ERS 2 data

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.475..111m&link_type=abstract

In: Proceedings of the Third International Symposium on Retrieval of Bio- and Geophysical Parameters from SAR Data for Land Appl

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Agriculture, Land Cover

Scientific paper

Wetlands are areas where the frequent and prolonged presence of water at or near the soil surface drives the natural system. Next to Buenos Aires, the Lower Delta islands of the Paraná River constitute a fresh water wetland characterized by a complex mosaic of natural and man made ecosystems and an hydrologic regime defined by the Paraná and De la Plata rivers. Marshes cover up to 50% of the area, 20% of which are subjected to continues fire events. Monitoring broad-scale ecological responses to disturbance such as fire events can be facilitated by automated change-detection approaches using remotely sensed data. The objective of the work is to detect changes in this wetland using a time-series of ERS 2 data, and relate these changes to wetland characteristics and condition. The data set consisted of 14 ERS images (one of 1998 acquired during a El Niño episode, 6 of 1999 and 7 of 2000 using the 35-day repeat cycle) which were calibrated, co-registered, and temporally and spatially filtered. This presentation discusses temporal patterns of SAR response in the area, and presents a map of fire-disturbed areas.

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