Located in Sanmenxia City, north-west Henan Province. In winter, when the reservoir is storing water, it may extend for 100 km in length and be 5 km wide and the water can be up to 324 m in depth. In summer and autumn, when the water is released from the reservoir, it has a maximum width of 4 km and the shallow areas will be exposed.
Non-bird biodiversity: No information.
BirdLife International (2020) Important Bird Areas factsheet: Sanmenxia Dam Nature Reserve. Downloaded from http://www.birdlife.org on 29/11/2020.