Abstract
Abstract This paper examines the applicability of NOAA satellite AVHRR imagery to monitoring and studying the river floods and associated hydrological conditions in Bangladesh and the adjoining regions. The flood period considered is that of the last 10 days of September 1984, when Bangladesh experienced one of the worst floods in recent years. Imagery from dry winter conditions have also been used for comparison. The analysis involved the calibration of the NOAA-7 Advanced Very High Resolution Radiometer (AVHRR) IB data tapes, linearization of pixel sizes and geometric rectification of the image to ground reference points. The imagery showed that a vast area of Bangladesh was flooded and rivers were highly turbid. Comparisons have been made between the major rivers, particularly the Ganges and the Brahmaputra, during the flood season. It has been found that the Ganges has higher albedo (is more turbid) and is warmer than the Brahmaputra during the flood season. The Brahmaputra shows a gradual increase in...
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