Some numbers to boggle the brain:
•Each year approximately 11 cubic kilometers (11,000,000,000,000 litres) of water spread over the
6,000-15,000 km² area.
•Approximately 60% is consumed through transpiration by plants
•36% by evaporation
•2% percolates into the aquifer system
•2% flows into Lake Ngami
•0% flow into any sea or ocean
Although the Okavango Delta is widely believed to be the world largest inland delta, it is, in fact not. In Africa alone there are two larger similar geological features - the Sudd on the Nile in South Sudan, and the Inner Niger Delta in Mali.