Abstract: “Dry Lake” is an important representation of the shortage of water resources and the change of water environment in Baiyangdian.The shallow dish-shaped topography of Baiyangdian determines its weak water storage capacity,large evaporation capacity and large infiltration capacity.As the climate dries,the rainfall decreases,and the water consumption of industry and agriculture in the region increases,the water interception of upstream water conservancy projects is large,and the groundwater overdraft is serious,resulting in a further decrease in surface runoff.A variety of factors have led to a sharp decline in the water inflow of Baiyangdian in the 1970s and 1980s after the wet season in the 1950s and 1960s,and the “Dry Lake” occurs frequently.It is imperative to take “water diversion to the lake” and “comprehensive treatment” to strive to remove the threat of “Dry Lake”.

Key words: Baiyangdian, Dry Lake, impoundment