In 1996 44 rhinoceros were killed by floods. In 1998 due to exceptionally heavy rainfall the Brahmaputra River flooded and parts of the park were under 6 metres of water.
Forty-four rhinos died in floods in 1996. In 1998, owing to severe rainfalls, the Brahmaputra River overflowed, submerging parts of the park up to six meters deep.