Introduction to the Donghekou Barrier Lake: The Donghekou Barrier Lake is located in the Hongguang section of the Qingzhu River. It was formed when the dangerous Donghekou earthquake collapsed during the "5.12" earthquake and rocks blocked the river channel. The total collapse volume of this barrier lake is 12 million cubic meters, with a maximum storage capacity of 6 million cubic meters, an existing storage capacity of 3 million cubic meters, and a water depth of 18 meters.