 They may be substantially dry at the end of the dry season, revealing grey soils or black clays, but unlike a flooded grassland, they retain wet lines of drainage through the dry season.They are inundated (waterlogged) in the wet season but not generally above the height of the vegetation and any open water surface is usually confined to streams, rivers and small ponds or lagoons (called pans) at the lowest point, generally near the centre.The name dambo is most frequently used for wetlands on flat plateau which form the headwaters of streams and rivers.