Above, this overlay of two radar mosaics constructed by the Global Rain Forest Mapping Project shows the patterns of flooding in a section of the central Amazon River Basin. The image is nearly centered on the GPS station in Manaus, Brazil. One mosaic was acquired during the low-water period of late1995, and the second during peak stage in 1996. Dark blue indicates channels that always contain water, while white depicts floodplains that seasonally flood and drain, and green represents non-flooded areas. Below, a topographic map of much of the same region.