River delta The Okavango Delta in Botswana is one example. The generic term "mega delta" can be used to describe very large Asian river deltas, such as the Yangtze, Pearl, Red, Mekong, Irrawaddy, Ganges-Brahmaputra, and Indus. The formation of a delta is complicated, multiple, and cross-cutting over time, but in a simple delta three main types of bedding may be distinguished: the bottomset beds, foreset/frontset beds, and topset beds. This three part structure may be seen in small scale by crossbedding. The Ganges/Brahmaputra combination delta, which spans most of Bangladesh and empties into the Bay of Bengal, is the world's largest delta.
Saskatchewan River Delta northwestern region of the delta. For example, Cumberland Lake, the largest lake in the SRD, has become shallower --- from pre-avulsion depths of over 6 meters to average depths of less than 1.5 meters today --- through sediment infilling following the avulsion. The 1870s event also contributed to the demise of sternwheeler riverboat traffic on the Saskatchewan River in the late 1800s and early 1900s because of difficulties in navigating through the modified channel networks resulting from the diversion. Developmental and avulsion history of the lower delta is more poorly known although evidence of multiple historical channels is apparent from