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Use of NOAA/AVHRR data for flood monitoring in Mekong river delta
Hoang Minh Hien
Abstract: The quantitative split window channel threshold value has been given for an identification of waterbodies and land surface under semi-transparent clouds. By this way, much wider ground areas for any condition of the weather, for any kind of cloud systems can be analysed and detected. The techniques for objective defining the threshold values and automatically running the program for flood monitoring have been developed. A technique for identifying the image pixels with different rate of mixing between water and land has been developed, too. A case study for flood monitoring in the Mekong river delta in the late 1997 year has been carried out and the results of flood monitoring on 15 November 1997 are shown in the paper as a demonstration. |