Bangladesh and India share some of the most intricate and complex river systems in the world. Totalling thousands of kilometres these formidable networks of waterways consist of tiny mountain streams, winding seasonal creeks, traversing canals and magnificent rivers and their tributaries and distributaries. These include around 54 large and small rivers. Virtually most of them are linked to the three major rivers, the Ganges, the Brahmaputra and the Meghna and all of them ultimately flow into the Bay of Bengal. The combined outflow of these three major rivers is only exceeded in the world, by the mighty Congo and the Amazon and is greater than the combined flows of the 20 largest rivers in Europe.