Flooding patterns of the Okavango Delta from Envisat Advanced Synthetic Aperture Radar (ASAR) time-series. Areas identified as open water surfaces appear as blue, and water surfaces covered by vegetation appear as green. The spatial resolution of 150 m captures precisely small-scale flooding patterns, such as channels and lagoons. The time series comprises 13 images for the year 2005. The spatial extent of the flooded area varies between 1200 and 9000 sq km. This time series, created under the TIGER project 'Remote Sensing as a data source for surface and groundwater modelling in Botswana', will be used for calibrating a hydrological model.