Analysis on the causes of Dongan dam construction from the perspective of climate

1, precipitation and evaporation: if the local precipitation is less or insufficient, but the evaporation is large, this may lead to insufficient water supply. Damming can store water resources in rainy season and replenish them in dry season, and adjust the unbalanced seasonal distribution of water resources.

2. Climate change and extreme weather events: Climate change may lead to more frequent or severe extreme weather events, such as drought or flood. Dams can reduce flood disasters in downstream areas during floods and provide stable water sources during droughts.