Change detection analysis in wetlands using JERS-1 radar data:tonle Sap Great Lake, Cambodia

Abstract

AIRSAR data were collected over the Tonle Sap Great Lake (TSGL) and Angkor regions of Cambodia during the NASA-Australia sponsored PACRIM2 Mission flown in September 2000 and analysed to produce a wetlands vegetation map and to determine flood extent in the TSGL. Archival JERS-1, L-band radar data for the period 1992-98 was available to assess changing environmental conditions brought about by the seasonal variation in water levels associated with flooding and that caused by human occupation and migration. Assessment of the changing environmental conditions was undertaken using three JERS-1 L-band images acquired in 1997. One image was obtained during the dry season in January when water levels associated with the TSGL were changing; one at the end of the dry season in April near to the period of low water in the lake, and the third image in August at the beginning of the next wet season.